DIY_EFI Digest Wednesday, March 29 2000 Volume 05 : Number 129 In this issue: Re: O2 sensor response times- catalyst Re: aftermarket ecu etc... Re: aftermarket ecu etc... Re: 8051 Code Re: O2 sensor response times- catalyst Re: Aftermarket ECU & RT OS Re: Diacom cable RE: aftermarket ecu etc... Re: aftermarket ecu etc... Re: aftermarket ecu etc... Re: Diacom cable RE: Diacom cable Re: 8051 Code Re: Diacom cable Re: aftermarket ecu etc... Re: aftermarket ecu etc... As The World Turns . . . (was Cheap Protection ... The circuit) See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Wed, 29 Mar 2000 21:52:52 From: "Mike (Perth, Western Australia)" Subject: Re: O2 sensor response times- catalyst At 07:30 PM 29/3/2000 +0800, you wrote: >save on mail volume. You've already distrivuted the huge caveat. Why >repeat it? A repeat is OK, best to ignore speed slips or arguments and criticality will creep into whats been interesting discussion, people seem to get awfully defensive and upset over really trivial things when they can't see someones expression face to face etc, Consequence of the primitive technology at moment I guess, Just for instance, I've been doing net stuff on and off since 1979 or so and found email's become a real casual (hopefully non-pedantic) way of sharing knowlegde. I saw a email argument on a CPU user group that started with some really trivial thing, nobody else said anything, but the vitriol and defensiveness went way over the top - got serious. It made me very sad it got to that stage, my 2c worth Best to ignore mistakes and repeats - *everyone* makes them, >Why would you deliverately put in so much excess fuel? I've heard F1 runs as high as 4:1 from time to time - for the most part to keep the exhaust valves from melting whilst still getting some usable power... Of course those engines are now doing around 17,000 rpm with a fairly narrow power band. Someone once said the screaming sound you hear when they go past ain't the engines - its the gearboxes ! Also to reduce pinging you might move to lower AFR as well, even though the power goes down, this I might add is for engines where there ain't WI, but we'll all change that soon ;-) Rgds :) Mike - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 06:24:59 -0800 From: Mike R Brown Subject: Re: aftermarket ecu etc... Toby Atwater wrote: > Sorry I know this isn't "Do It Yourself", more like "Pay it Yourself and > break the bank" > > Does anybody know of a aftermarket ECU that has some kind of PC output? All > the ones I have seen either have a separate unit with a small b/w lcd > screen, or else they have some kind of data logging capabilities that will > off load to a PC "after the race". What I am looking for is something with a > PC output that will display what is being inputting into the ECU through > it's sensors in real time, or close to real time. I basically want to > monitor what is happening inorder to 1) learn more about how it's doing its > thing, 2) troubleshoot sensors and other things if things aren't working 3) > the coolness factor. Toby, The Edelbrock-Weber Pro-Flo is a capable system. It comes with a small control module that interfaces with the ECM to monitor and set many parameters. Building a simple interface cable you can plug it into your laptop and do the same. Makes it a lot easier to see what is going on than using their two line display. You can also record what is happening for later analysis. PC software is out there to do all of this. Mike - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 08:48:26 -0600 From: Gabe Subject: Re: aftermarket ecu etc... Someone may have already mentioned it, but the Electromotive unit does everything you're talking about. It won't data log and then dump to PC after a race, but you can datalog during the race and look at it later. I can change the timing and the fuel curve realtime, monitor sensors realtime, save as many calibrations as my hdd can hold, etc... In the datalogging portion of the software, it records the values in less than .1 sec intervals. Gabe > Toby Atwater wrote: > > > Sorry I know this isn't "Do It Yourself", more like "Pay it Yourself and > > break the bank" > > > > Does anybody know of a aftermarket ECU that has some kind of PC output? All > > the ones I have seen either have a separate unit with a small b/w lcd > > screen, or else they have some kind of data logging capabilities that will > > off load to a PC "after the race". What I am looking for is something with a > > PC output that will display what is being inputting into the ECU through > > it's sensors in real time, or close to real time. I basically want to > > monitor what is happening inorder to 1) learn more about how it's doing its > > thing, 2) troubleshoot sensors and other things if things aren't working 3) > > the coolness factor. - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 07:51:20 -0800 From: "John Dammeyer" Subject: Re: 8051 Code > Date: Wed, 29 Mar 2000 12:33:12 +0100 > From: Corner Paul > Subject: 8051 EFI code > > Hi John > > Any chance you would like to share the algorithms or some of the source code > ? > I've looked at Al Lipper's work - the core routines aren't that different to > what I had allready coded. > > Regards, Paul. Hi Paul, Can't distribute code as I'm bound by NDA but I can talk about it a bit. I based my code on Al Grippo's paper along with the series of articles in Circuit Cellar Ink. In other words, I used a Volumetric Efficiency table approach rather than the MAP-RPM 2-D table. I have parameters like Displacement, number of cylinders and injector size along with Fuel/air ratio to determine the baseline 100% VE fuel required on a per stroke basis. I guess at Vapour pressure because I don't measure RH. Given X amount of air in the cylinder at atmospheric pressure I then have the amount of fuel (F) the engine requires. The MAP divided by the Barometer forms a ratio less than 1.0 and the VE table is in percent so the basic equation is simply (X+F) * MAP/Barometer * VE[RPM]. I have a mainline loop that continuously calculates these values along with acceleration and temperature enrichments and updates a global pulse width variable. The main loop just reports status out the CAN bus and recalculates PW based on the A/D values which are triggered to also update via interrupts. We have two HALL sensors underneath the CAM timing pulley which are switched by 4 magnets set at 90 degrees to each other to create a Grey Code encoder. This tells me from the bit pattern: 00, 01, 11, 10 which cylinder is at TDC and creates an interrupt on each single bit change. Notice the Grey Code only has one bit that ever changes so an interrupt is fairly easy to decode into a quadrant. The down side is the CAM has to make one complete revolution after power up before the sensors report the correct values as they are latching sensors where a North magnetic pole turns them on and South turns them off and they come up in an unknown state. It means at worst case the engine cranks two revolutions before starting. I chose the 80C592 because it has enough compare registers to assign one per injector and coil pair and of course comes with CAN bus. The rest of the code is just house-keeping to make the injectors and coils fire at the right time. I've done empirical tests and found that up to about 4000RPM I'm updating the PW once per injector squirt after that I start to lag behind but we haven't found that to be a hindrance as an unloaded engine winds up to redline far faster than I can pull the throttle back and a fully loaded engine doesn't change load on a per stroke basis. To tune the engine we've determined the best way is to set the dyno, (or propeller) to load the engine enough so that the throttle is wide open at a number of different RPM settings. (1500, 2000, 2500, 3000 ...). During this time we tweak the VE table values till the O2 sensor starts dancing around 0.5V. With a bit of extrapolating we end up filling in the VE table between those values (100RPM steps) and end up with values from about 45% up to 95%. For values less than WOT the MAP/Barometer ratio seems to keep the mixture fairly even. This beats filling in a Lookup[RPM,MAP] table with hundreds of values. Enrichments are done by monitoring engine temp, air temp and the TPS. What is really cool is that when we put in bigger injectors the only thing we change is the size of the injector and the engine runs with shorter pulse widths but the mixture is just about spot on. One other parameter that affects the low end idle and overall mixture is the open/close time of the injector. We guess that 66% of the rated fuel is delivered during this time so if we need 4ms fuel and the open/close time is 3ms then we need a 5ms pulse. i.e.: PW = Desired rate - (OpenTime*.66666) + OpenTime. or PW = 4ms - (3ms * 0.66666) + 3ms ==> 4ms - 2ms + 3ms ==> 5ms. Change to Lucas Disk Injectors from Pintle Injectors and that formula changes because the Lucas open faster. I'd like to say .. simple eh? .... but it wasn't and we still have little glitches that are unsolved but I suspect are mechanical or electrical rather than software. Cheers, John - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 08:51:04 -0800 From: garwillis@xxx.com (Garfield Willis) Subject: Re: O2 sensor response times- catalyst On Wed, 29 Mar 100 19:30:16 +0800 (WST), Bernd Felsche wrote: >>Argh. All I'm at liberty to say to the immediately above is "BZZZT". > >Thought you might. :-) I didn't put a big disclaimer on there to >save on mail volume. You've already distrivuted the huge caveat. Why >repeat it? I am kinda worried about others thinking those numbers were authoritative, given the source you quoted, and try them, only to damage their expensive sensor. Thas all, mate. Someone recently mentioned getting an NTK sensor directly from NTK. If so, they paid *alot* more than $100 for it from NTK. Those sensors are also quite different in pumping current requirements, cal res value, even physical construction, from the ones NTK makes for Honda. Having them side-by-side is quite revealing. When someone asks for advice on how to do something, you wanna be careful you don't recommend something potentially damaging. Not tryna flame ya, just tryna keep my own frustration levels under control. I'd love to just blurt out all the stuff we've been thru in getting working/robust hardware, but I can't cuz it's now business. Sigh. I would like to mention one other facet of these "caveats". Every mfg. of equipment that uses these sensors has had to build in a number of electrical safety-measures and checks, to guard against the sensor being damaged, either during warm-up, or disconnects, or even circuit failure. So you can imagine my chagrin to hear people say, "yeah, +25 mils should do it on the rich side". Argh, it's hard to watch. >It's the latest book. The book doesn't provide the numbers, other >than the lambda range and the characteristic curve. The current >values are from the data sheet. I see; when you said those numbers were derived from the Bosch book, I read too much into the word "derived". Was it the data sheet of the Bosch sensor, BTW? >Is the NTK any different to the Bosch wide-range lambda probe? Yes, of course. You can expect each of them to vary quite a bit as to driving requirements, etc. The Denso 4-wire widebands are also considerably different in their pump current requirements. There are even two of THESE now to contend with and research; one that Toyota uses, and one that Honda uses on their HX engines. They have different Denso part nos, as well as looking physically different, but they're both Denso 4-wire wideband sensors! Cain't assume they're all the same. >Both use the pump current to indicate the AFR. >Both use a reference cell against which to balance O2 concentration. Yes, the basics/fundamentals are probly all the same if it's a 5-wire. Yet, witness the recent discussion that suggested the LSU and NTK sensors may use different circuitry and have different behavior. The 4-wires are again only slightly different apparently. But that doesn't mean you can take the numbers for one and use them on the other, eh? That was my point. If you do, you're gonna damage something spendy. Ooops, there I go AGAIN! Dang. Forgive me, I grew up in poverty as a child. :) >>BTW, 0.7 lambda is roughly 10AFR. WOT turbo engines can/will fuel in the >>10'sAFR during transient enrichment under heavy load, so altho this >>isn't "steady-state running", being able to see and measure these rich >>excursions isn't so far afield. And carb'd engines will lean-misfire and >>even backfire, if idle-jetting combined with a rapid undamped >>throttle-off runs the AFR to above 17-18, so measuring to this lean, >>again altho not "steady-state" still can be important, too. > >Why would you deliverately put in so much excess fuel? >It takes you right off the power curve peak. In aviation engine work, it's referred to as "detonation margin". The excess fuel is used as a coolant basically. And it appears from the transient nature in EFI turbo engines, that these short rich excursions at the points of sudden throttle pos change are more like safety measures to ensure that there *won't* be any sudden unplanned/unwanted *lean* excursions to light off the expensive fireworks. After those short enrichments, the mix settles quickly down to somewhere in the 12sAFR for max power. These transients only last for some fraction of a second. I trust anyone would at least certainly want to see any transient *lean* excursions occurring under high boost and fast throt changes? The only reason the Honda wideband ECU uses open-loop for AFRs lower than 12 is that it probly doesn't *use*/command higher enrichment, unless under cold-crank or cold-start; and there as you point out, the sensor isn't likely lighted off yet (takes about 30-40 secs, pretty fast but still not fast enough), not to mention the fact that in those regimes with wall-wetting and fuel condensation, trying to measure the AFR would be a pretty goofy idea anyway. All the commercial AFR meters go down into the 10sAFR; it's an area people want to at least get a glimpse at, even if you're only there for a brief moment. Peace, Gar - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 08:58:55 -0800 From: Randall Subject: Re: Aftermarket ECU & RT OS Hi Paul : No, but I have looked at other UNIX variants with "real time extensions". For what I do (which has nothing to do with EFI or engine management), they are just way too slow, and take too much processor. It's possible that Linux would make sense, for a "one of a kind" homebrew, but you'd want to see some hard figures on worst-case interrupt latency, task switch, etc. Part of the issue is that "real-time" means different things to different people. Most of the UNIX enhancements I've seen concentrate on things like adding task priorities (which is certainly important), but do little to address things like worst-case task switch. Whether you can live with that depends a lot on what your requirements are. Frankly, IMO a complex operating system always adds complexity to the project. If you don't need that complexity (and I don't see it as being required for engine management/EFI), why bother ? To put it another way, there's a lot to be said for the KISS (Keep It Simple, Stupid) principle Cheers Randall Corner Paul wrote: > > Hi Randall > > Have you looked at Linux - there are Real Time patches available. > > Regards, Paul > ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 13:15:03 EST From: "93 Formula" Subject: Re: Diacom cable The company would probably not appreciate that much since they dont copy protect there $25-500 software. An easy way to EXTEND the cable if that is what you are really doing is to just add a 25 pin straight through cable between the cable and the pc... The problem being it is parallel and may have problems over extended distances. but 20' should be fine. If you need to go longer, a signal enhancer may be needed. Jeff go.to/LilDemon >Dan Plaskett wrote: > > > > Hey gang, > > > > Has anyone built a Diacom cable? I'd like to build one that is about >20ft > > long so I can use the PC in my garage (not a portable). I thought I saw >a > > schematic some time ago but since the archives have been down haven't >been > > able to find it. > >I have it if you need it. Just e-mail me. Haven't gotten around to >building it yet, but I plan to in a couple of days when I have a little >spare time. >-- >Steve >97 Chevy Camaro Z28, Mystic teal, A4, not stock >90 Kawasaki EX500A4, black, M6, not even CLOSE to stock! >lt1_z28@xxx.net/~lt1_z28 >Aluminum, steel, carbon fiber, titanium, and two cast iron balls. >McMillan Motorsports- http://www.mmsbikes.com >---------------------------------------------------------------------------- >To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the >quotes) >in the body of a message (not the subject) to majordomo@xxx.org > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 11:44:00 -0500 From: dave.williams@xxx.us (Dave Williams) Subject: RE: aftermarket ecu etc... - -> There is also no reason you can't "roll yer own" : use DOS (or - -> equivalent) to load your program image into memory, then grab all the - -> interrupts and the machine is yours. Tom Wagner's CTASK multitasking library for C does polled and pre-emptive tasking under DOS. Very small, more features than you can shake a register at, thoroughly documented and debugged, widely used, and free. What more could you ask? - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 21:11:30 +0200 From: "Espen Hilde" Subject: Re: aftermarket ecu etc... Hi! You cant change a particular point on the map just the "idle jet" and the "main jet" to scale the flow and a volumetric compensation all over, you can change the timing but it will increase or decrease all over. You have to stop the engine to download the new calibration. Thats what the Paf blend software I have are capable of. Espen Electromotive unit does everything > you're talking about. It won't data log and then dump to PC after a race, but you > can datalog during the race and look at it later. I can change the timing and the > fuel curve realtime, monitor sensors realtime, save as many calibrations as my hdd > can hold, etc... In the datalogging portion of the software, it records the values > in less than .1 sec intervals. > > Gabe > > > Toby Atwater wrote: > > > > > Sorry I know this isn't "Do It Yourself", more like "Pay it Yourself and > > > break the bank" > > > > > > Does anybody know of a aftermarket ECU that has some kind of PC output? All > > > the ones I have seen either have a separate unit with a small b/w lcd > > > screen, or else they have some kind of data logging capabilities that will > > > off load to a PC "after the race". What I am looking for is something with a > > > PC output that will display what is being inputting into the ECU through > > > it's sensors in real time, or close to real time. I basically want to > > > monitor what is happening inorder to 1) learn more about how it's doing its > > > thing, 2) troubleshoot sensors and other things if things aren't working 3) > > > the coolness factor. > > - ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 14:09:52 -0600 From: Gabe Subject: Re: aftermarket ecu etc... Yep that's true.... Guess I should've been a little more clear. I run SuperBlend... How do you like PAFblend? It wasn't available when I got my system. Gabe Espen Hilde wrote: > Hi! > You cant change a particular point on the map just the "idle jet" > and the "main jet" to scale the flow and a volumetric compensation all > over, you can change the timing but > it will increase or decrease all over. > You have to stop the engine to download the new calibration. > Thats what the Paf blend software I have are capable of. > Espen > Electromotive unit does everything > ? you're talking about. It won't data log and then dump to PC after a > race, but you > ? can datalog during the race and look at it later. I can change the > timing and the > ? fuel curve realtime, monitor sensors realtime, save as many calibrations > as my hdd > ? can hold, etc... In the datalogging portion of the software, it records > the values > ? in less than .1 sec intervals. > ? > ? Gabe > ? > ? ? Toby Atwater wrote: > ? ? > ? ? ? Sorry I know this isn't "Do It Yourself", more like "Pay it Yourself > and > ? ? ? break the bank" > ? ? ? > ? ? ? Does anybody know of a aftermarket ECU that has some kind of PC > output? All > ? ? ? the ones I have seen either have a separate unit with a small b/w lcd > ? ? ? screen, or else they have some kind of data logging capabilities that > will > ? ? ? off load to a PC "after the race". What I am looking for is something > with a > ? ? ? PC output that will display what is being inputting into the ECU > through > ? ? ? it's sensors in real time, or close to real time. I basically want to > ? ? ? monitor what is happening inorder to 1) learn more about how it's > doing its > ? ? ? thing, 2) troubleshoot sensors and other things if things aren't > working 3) > ? ? ? the coolness factor. > ? > ? > ---------------------------------------------------------------------------- > > ? To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the > quotes) > ? in the body of a message (not the subject) to majordomo@xxx.org > ? > ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 14:18:36 -0600 From: MysticZ Subject: Re: Diacom cable 93 Formula wrote: > > The company would probably not appreciate that much since they dont copy > protect there $25-500 software. An easy way to EXTEND the cable if that is > what you are really doing is to just add a 25 pin straight through cable > between the cable and the pc... The problem being it is parallel and may > have problems over extended distances. but 20' should be fine. If you need > to go longer, a signal enhancer may be needed. I didn't explain it earlier, but this cable is NOT a copy of theirs, it's just a compatible one. I didn't design it, and I haven't even built it yet, but I do own the software. - -- Steve 97 Chevy Camaro Z28, Mystic teal, A4, not stock 90 Kawasaki EX500A4, black, M6, not even CLOSE to stock! lt1_z28@xxx.net/~lt1_z28 Aluminum, steel, carbon fiber, titanium, and two cast iron balls. McMillan Motorsports- http://www.mmsbikes.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 12:36:29 -0800 From: Dave Plummer Subject: RE: Diacom cable What good is a compatible cable? Is there software that you can use with it? - - Dave > -----Original Message----- > From: MysticZ [mailto:lt1_z28@xxx.org] > Sent: Wednesday, March 29, 2000 12:19 PM > To: diy_efi@xxx.org > Subject: Re: Diacom cable > > > 93 Formula wrote: > > > > The company would probably not appreciate that much since > they dont copy > > protect there $25-500 software. An easy way to EXTEND the > cable if that is > > what you are really doing is to just add a 25 pin straight > through cable > > between the cable and the pc... The problem being it is > parallel and may > > have problems over extended distances. but 20' should be > fine. If you need > > to go longer, a signal enhancer may be needed. > > I didn't explain it earlier, but this cable is NOT a copy of theirs, > it's just a compatible one. I didn't design it, and I haven't > even built > it yet, but I do own the software. > -- > Steve > 97 Chevy Camaro Z28, Mystic teal, A4, not stock > 90 Kawasaki EX500A4, black, M6, not even CLOSE to stock! > lt1_z28@xxx.net/~lt1_z28 > Aluminum, steel, carbon fiber, titanium, and two cast iron balls. > McMillan Motorsports- http://www.mmsbikes.com > -------------------------------------------------------------- > -------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" > (without the quotes) > in the body of a message (not the subject) to > majordomo@xxx.org > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 21:06:26 +0100 From: Paul Corner Subject: Re: 8051 Code Hi John > > Any chance you would like to share the algorithms or some of the source code > > Can't distribute code as I'm bound by NDA but I can talk about it a bit. I based my code > on Al Grippo's paper along with the series of articles in Circuit Cellar Ink. I was afraid you would say that.... This Circuit Celler thing, where can I find the articles you mention. I doubt if they are on line. Thanks for the insight into your algorithims, I'll plug the Monitor ROM back into my board and have a little play. Looks like I'm going to have to fit air preasure and airflow sensors at some stage. At least I don't have to worry about emission regs. Regards, Paul - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 16:40:39 -0500 From: "nacelp" Subject: Re: Diacom cable Just for like if someone traded, or bought a used diacom, and then ruined a cable. Or just didn't like the kinky mess of a cable they use, and you wanted to wire it in permanently. Diacom only will talk to you if your the original owner. They, can be alot less then customer oriented in my opinion, but it's a free world. I like their program. Just I won't do any more business with them then absolutely neccessary. I have a scanner I bought from LTS, and when I mentioned a spare connector, they sent it no charge. Grumpy > What good is a compatible cable? Is there software that you can use with > it? > > - Dave > > > -----Original Message----- > > From: MysticZ [mailto:lt1_z28@xxx.org] > > Sent: Wednesday, March 29, 2000 12:19 PM > > To: diy_efi@xxx.org > > Subject: Re: Diacom cable > > > > > > 93 Formula wrote: > > > > > > The company would probably not appreciate that much since > > they dont copy > > > protect there $25-500 software. An easy way to EXTEND the > > cable if that is > > > what you are really doing is to just add a 25 pin straight > > through cable > > > between the cable and the pc... The problem being it is > > parallel and may > > > have problems over extended distances. but 20' should be > > fine. If you need > > > to go longer, a signal enhancer may be needed. > > > > I didn't explain it earlier, but this cable is NOT a copy of theirs, > > it's just a compatible one. I didn't design it, and I haven't > > even built > > it yet, but I do own the software. > > -- > > Steve > > 97 Chevy Camaro Z28, Mystic teal, A4, not stock > > 90 Kawasaki EX500A4, black, M6, not even CLOSE to stock! > > lt1_z28@xxx.net/~lt1_z28 > > Aluminum, steel, carbon fiber, titanium, and two cast iron balls. > > McMillan Motorsports- http://www.mmsbikes.com > > -------------------------------------------------------------- > > -------------- > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" > > (without the quotes) > > in the body of a message (not the subject) to > > majordomo@xxx.org > > > -------------------------------------------------------------------------- - -- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 30 Mar 2000 09:31:50 +1000 From: Peter Gargano Subject: Re: aftermarket ecu etc... Where do I find the repository for CTASK's most recent source code? Dave Williams wrote: > Tom Wagner's CTASK multitasking library for C does polled and > pre-emptive tasking under DOS. Very small, more features than you can > shake a register at, thoroughly documented and debugged, widely used, > and free. What more could you ask? - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 30 Mar 2000 01:42:27 +0200 From: "Espen Hilde" Subject: Re: aftermarket ecu etc... Hi! It could do what they say it can if I could get my hands on a EGOR. Its nice to look at the stored datas and point out a lean spot at cruise thats with a swich EGO.The grafic rpm output gives some sort of accleration indication ,maybe with some sort of calculation could tell the hp.I canged the chip and softwear from Super and its much better. Infact the engine didnt work with Super,it started occilating when the exhaust backpressure increased over 1,6bar.I tought it was the exhaust turbines that was to smal and choked the engine and put the compressors over their pump limmit,but when I canged to PAF Blend without using the mix funktion of TPS and MAP at high rpm the engine ran good. I think it sucks that you dont have millisec bars to change and the itot and gamma things is confusing.If you cange the fuel pressure or injectors īts impossible to re scale it you have to map it once more. You have to shut down your glowing turbo engine to change one parameter in the map,time consuming and costs money at the dyno. You can change the small numbers in the volumetric tables ,it wouldn t help ,it dont change anything.The pulsewith resolution is crap.If I have 1%co next step in fuel delivery is 3%Co........I got WERY dissapointed when I discovered this after some fuel tanks at Idle. Allmost impossible to use staged injectors without a week in the dyno. I think I hate it.................. It could be very good ,it has easy mounting ,compact ,rugged,ok,quality. perfect with the coils on top of the ecu . fun toy.....but thats all. I think its good on a standard 4000rpm max V8 .but then GM is better also. Sorry I have to stop this ....I could keep up for hours,maybe my exspectations where to high . Espen. > Yep that's true.... Guess I should've been a little more clear. > > I run SuperBlend... How do you like PAFblend? It wasn't available when I got > my system. > > Gabe > > Espen Hilde wrote: > > > Hi! > > You cant change a particular point on the map just the "idle jet" > > and the "main jet" to scale the flow and a volumetric compensation all > > over, you can change the timing but > > it will increase or decrease all over. > > You have to stop the engine to download the new calibration. > > Thats what the Paf blend software I have are capable of. > > Espen > > Electromotive unit does everything > > ? you're talking about. It won't data log and then dump to PC after a > > race, but you > > ? can datalog during the race and look at it later. I can change the > > timing and the > > ? fuel curve realtime, monitor sensors realtime, save as many calibrations > > as my hdd > > ? can hold, etc... In the datalogging portion of the software, it records > > the values > > ? in less than .1 sec intervals. > > ? > > ? Gabe > > ? > > ? ? Toby Atwater wrote: > > ? ? > > ? ? ? Sorry I know this isn't "Do It Yourself", more like "Pay it Yourself > > and > > ? ? ? break the bank" > > ? ? ? > > ? ? ? Does anybody know of a aftermarket ECU that has some kind of PC > > output? All > > ? ? ? the ones I have seen either have a separate unit with a small b/w lcd > > ? ? ? screen, or else they have some kind of data logging capabilities that > > will > > ? ? ? off load to a PC "after the race". What I am looking for is something > > with a > > ? ? ? PC output that will display what is being inputting into the ECU > > through > > ? ? ? it's sensors in real time, or close to real time. I basically want to > > ? ? ? monitor what is happening inorder to 1) learn more about how it's > > doing its > > ? ? ? thing, 2) troubleshoot sensors and other things if things aren't > > working 3) > > ? ? ? the coolness factor. > > ? > > ? > > - ---------------------------------------------------------------------------- > > > > ? To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the > > quotes) > > ? in the body of a message (not the subject) to majordomo@xxx.org > > ? > > - ---------------------------------------------------------------------------- > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > > in the body of a message (not the subject) to majordomo@xxx.org > > - ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 29 Mar 2000 16:44:56 PST From: "mike mager" Subject: As The World Turns . . . (was Cheap Protection ... The circuit) (complete quotation below) Bernd, Thanks for patching that hyperlink into the WWW page, it worked just fine the first time. Immediately before you sent that (this) message, I had tried the hyperlink posted to the DIY EFI list, and, still, no success; I saw that Microsoft Internet Exploder 5.00.2314.1003 cranked up the 'bytes downloaded' statistic by 46,743 exactly bytes, and then just 'hung' - for over twenty minutes!; A question to all: should Microsoft's new logo be that spinning 'world' thing in IE (As The World Turns . . . ), or should it be the hour-glass mouse-cursor? Back to the subject . . . so I gave up (on MS IE!); the new hyperlink on your page allowed download to a _file_ (where I can 'touch' it) in 25 seconds; can you say, "WTF?"? Now, I need to take a close look at the design . . . Thanks, Mike >From: Bernd Felsche >Reply-To: diy_efi@xxx.org >To: diy_efi@xxx.org >Subject: Re: Cheap Protection ... The circuit >Date: Wed, 29 Mar 100 18:50:42 +0800 (WST) > >mike mager writes: > > >> http://www.perth.dialix.com.au/~bernie/tech/LW.pdf > > >The hyper link completely stalls my computer; I understand PDF; is the >file > >enourmous, or is there some reason that it won't just 'pop' into an >Acrobat > >Reader window (allowing time for download)? > >It's only about 56 kbytes. I thought that better than 450kb of >Postscript... > > >I can (and did) access the site, no problem, but I saw no link to the PDF > >file. > >No link at all to that file. (You can't read the directory either >because if I had secrets, I wouldn't want you to know that I have :-) > >OK... I've taken mercy on you and added in the link on > http://perth.dialix.com.au/~bernie/ > >Under Technical Articles. > >If your network bruiser can't handle it automagically, then use >either the right mouse button options to download the file or a >shift-click usually does the job. > >I can even download it with lynx. No Problem. > >-- >Real Name: Bernd Felsche > Email: nospam.bernie@xxx.au > http://www.perth.dialix.com.au/~bernie - Private HP >---------------------------------------------------------------------------- >To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the >quotes) >in the body of a message (not the subject) to majordomo@xxx.org > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ End of DIY_EFI Digest V5 #129 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. 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