DIY_EFI Digest Sunday, 17 May 1998 Volume 03 : Number 227 In this issue: Re: Pressure Sensor for Flow Bench Bench Testing ecm-Please Read Re: Haltech F3 Bins Re: Haltech F3 Throttle Bracket Re: Bench Testing ecm-Please Read Re: Haltech F3 Re: Bench Testing ecm-Please Read Re: Haltech F3 Re: Haltech F3 Re: Haltech F3 Re: Haltech F3 Re: Bench Testing ecm-Please Read Re: Haltech F3 Re: Attachments Re: Solved ignition noise problem...thanks all! Re: Prom ID's Re: Angular acceleration Re: Solved ignition noise problem...thanks all! Re: Prom ID's turned out not 2 b ez Re: Wide Range 02 Re: Prom ID's Re: Bench Testing ecm-Please Read Re: Haltech F3 My EFI is alive! Re: Bench Testing ecm-Please Read & Very important question See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: "Dean" Date: Sat, 16 May 1998 23:54:20 +1200 Subject: Re: Pressure Sensor for Flow Bench For other people like me who like it basic and cheap here is some info on making a karting carb flow bench: http://4cycle.drikka.net/karting/flow.htm and some more flow bench stuff: http://www.govictory.com/ Dean. ------------------------------ From: "Bruce Plecan" Date: Sat, 16 May 1998 07:47:55 -0400 Subject: Bench Testing ecm-Please Read Again for the moment this is in reference to gm type ecms. Here at Cone Shaped Hat World Headquarters we're still gathering parts, for bench testing ecms, and another thought has ocurred to me. Shortly I'll be able to fire up an ecm with a rpm input, VSS, tps, coolant, IAT, map, and hopefully a closed loop O2. Then at the injector/ign end I'll have a dual trace scope, and a recorder type scanner at the aldl. So then I'll be able to verify prom locations, and net res. My question then is this, What type/name/nomenclature/devise would allow me to change the prom without having to reburn it. An emulator would but that is quessing blindly for addresses right?. Would it take a laptop to drive, this other devise?. Has anyone tried the above?. I imagine gm has exactly what I need but wouldn't give me one, even for educational use.. Other than needing 3 more O2 inputs would a OBDII ecm need anything more in the way of inputs?. Cheers Bruce All I need now is an EGOR for detecting neural misfirings when wearing my Cone Shaped Hat ------------------------------ From: Graeme Wellington Date: Sat, 16 May 1998 20:06:04 +0800 Subject: Re: Haltech F3 > . Does anyone know where I can get sensors with similar > response characteristics? Apparantly they are not GM units. > > > Matt Beaubien > mbeaubie@xxx.ca For what it may be worth, Haltech F9 sensors for temperature have the following temp/reistance specs. (both air intake and coolant sensors) deg F deg C ohm 210 100 185 160 70 450 100 38 1,800 70 20 3,400 40 4 7,500 20 -7 13,500 0 -18 25,000 - -10 -40 100,700 Graeme Wellington ------------------------------ From: "Bruce Plecan" Date: Sat, 16 May 1998 08:27:13 -0400 Subject: Bins Well, I need any gm bins anyone has to spare, perferably .bin.. Would appreciate Broadcast Code, and application. Any 2732/27128/27256/27512. Any flash stuff Please no mail bigger than a Meg atta time Cheers Bruce nacelp@xxx.net Almost makes ya wonder what going on a Cone Shaped Hat HQ......... Course most of the people at CSH, HQ also wonder that. ------------------------------ From: "Bruce Plecan" Date: Sat, 16 May 1998 08:57:41 -0400 Subject: Re: Haltech F3 From: Graeme Wellington Subject: Re: Haltech F3 >> . Does anyone know where I can get sensors with similar >> response characteristics? Apparantly they are not GM units. >> Matt Beaubien >> mbeaubie@xxx.ca > >For what it may be worth, Haltech F9 sensors for temperature >have the following temp/reistance specs. (both air intake and >coolant sensors) > >deg F deg C ohm > >210 100 185 >160 70 450 >100 38 1,800 >70 20 3,400 >40 4 7,500 >20 -7 13,500 >0 -18 25,000 >-10 -40 100,700 > >Graeme Wellington > Those are the same values that I show for the GM, IAT, and Coolant HTH Bruce ------------------------------ From: "Bruce Plecan" Date: Sat, 16 May 1998 09:16:33 -0400 Subject: Throttle Bracket Anybody have a throttle/TV cable bracket for a 85-6 Plenum?. If any other years would work, would someone let me know. TIA Bruce nacelp@xxx.net ------------------------------ From: Matthew Harding Date: Sun, 17 May 1998 00:10:12 +1000 Subject: Re: Bench Testing ecm-Please Read At 07:47 16/05/98 -0400, you wrote: >Again for the moment this is in reference to gm type ecms. >Here at Cone Shaped Hat World Headquarters we're still gathering >parts, for bench testing ecms, and another thought has ocurred to me. > Shortly I'll be able to fire up an ecm with a rpm input, VSS, tps, >coolant, IAT, map, and hopefully a closed loop O2. Then at the >injector/ign end I'll have a dual trace scope, and a recorder type >scanner at the aldl. > So then I'll be able to verify prom locations, and net res. >My question then is this, What type/name/nomenclature/devise >would allow me to change the prom without having to reburn it. >An emulator would but that is quessing blindly for addresses right?. > Would it take a laptop to drive, this other devise?. > Has anyone tried the above?. I imagine gm has exactly what I >need but wouldn't give me one, even for educational use.. > Other than needing 3 more O2 inputs would a OBDII ecm need >anything more in the way of inputs?. > Cheers isn't that what the software, and replacement memcal boards from these guys does? http://white.aljan.com.au/~bradhost/ our Aussie Management systems have gotta be real close to any delco unit you have over there..... ------------------------------ From: Steven Gorkowski Date: Sat, 16 May 1998 09:17:03 -0500 Subject: Re: Haltech F3 My F3 sensors stays at 43k ohms no matter what temp. It is using zener temp sensor in both non standard to gm . Throttle position sensor has three colors here are the (note it's not the same as GM) . color normal pos wot green /black 310 ohms 3.7k ohms orange/black 3.7k ohms 3.7k ohms orange/green 3.7k ohms 0 ohms Bruce Plecan wrote: > From: Graeme Wellington > Subject: Re: Haltech F3 > > >> . Does anyone know where I can get sensors with similar > >> response characteristics? Apparantly they are not GM units. > >> Matt Beaubien > >> mbeaubie@xxx.ca > > > >For what it may be worth, Haltech F9 sensors for temperature > >have the following temp/reistance specs. (both air intake and > >coolant sensors) > > > >deg F deg C ohm > > > >210 100 185 > >160 70 450 > >100 38 1,800 > >70 20 3,400 > >40 4 7,500 > >20 -7 13,500 > >0 -18 25,000 > >-10 -40 100,700 > > > >Graeme Wellington > > > Those are the same values that I show for the GM, IAT, and Coolant > HTH > Bruce ------------------------------ From: "Bruce Plecan" Date: Sat, 16 May 1998 11:19:48 -0400 Subject: Re: Bench Testing ecm-Please Read From: Matthew Harding Subject: Re: Bench Testing ecm-Please Read >> Shortly I'll be able to fire up an ecm with a rpm input, VSS, tps, >>coolant, IAT, map, and hopefully a closed loop O2. Then at the >>injector/ign end I'll have a dual trace scope, and a recorder type >>scanner at the aldl. >> So then I'll be able to verify prom locations, and net res. >>My question then is this, What type/name/nomenclature/devise >>would allow me to change the prom without having to reburn it. >>An emulator would but that is quessing blindly for addresses right?. >> Would it take a laptop to drive, this other devise?. >> Has anyone tried the above?. I imagine gm has exactly what I >>need but wouldn't give me one, even for educational use.. >> Other than needing 3 more O2 inputs would a OBDII ecm need >>anything more in the way of inputs?. >> Cheers > >isn't that what the software, and replacement memcal boards from these guys >does? Yes but at $700 (AUS) it would get expensive to do a bunch of different ecms, I can find some/most of the tables, which is what I think a good part of the information that your paying for with their system. > >http://white.aljan.com.au/~bradhost/ > >our Aussie Management systems have gotta be real close to any delco unit >you have over there..... > The other issue is I haven't heard of a distributor here in the US, and I get lerry about international problems. Cheers Bruce ------------------------------ From: goflo@xxx.net Date: Sat, 16 May 1998 09:51:24 -0700 Subject: Re: Haltech F3 Hi Matt - I'm not familiar with HALTECH's system but I wonder if the scheme is to sense the differential pressure across a venturi? If so this would explain the low pressure range of the sensor used. Jack ------------------------------ From: goflo@xxx.net Date: Sat, 16 May 1998 09:57:31 -0700 Subject: Re: Haltech F3 >I'm not familiar with HALTECH's system but I wonder if the >scheme is to sense the differential pressure across a venturi? >If so this would explain the low pressure range of the sensor >used. And there might be enough headroom left for boost. Jack ------------------------------ From: Sandy Date: Sat, 16 May 1998 10:31:28 -0700 Subject: Re: Haltech F3 F9 must be using a conventional automotive sensor, as this looks like the GM MAT/TEMP curves that I did a while ago. Not the same as the F3's which use an actual Temp IC from national. Sandy At 08:06 PM 5/16/98 +0800, you wrote: >> . Does anyone know where I can get sensors with similar >> response characteristics? Apparantly they are not GM units. >> >> >> Matt Beaubien >> mbeaubie@xxx.ca > >For what it may be worth, Haltech F9 sensors for temperature >have the following temp/reistance specs. (both air intake and >coolant sensors) > >deg F deg C ohm > >210 100 185 >160 70 450 >100 38 1,800 >70 20 3,400 >40 4 7,500 >20 -7 13,500 >0 -18 25,000 >-10 -40 100,700 > >Graeme Wellington > ------------------------------ From: Sandy Date: Sat, 16 May 1998 10:32:59 -0700 Subject: Re: Haltech F3 Again, I'm pretty confidant that the sensor on the F3 is an LM335 from national semiconductor. But, hey, it's still a guess... Sandy At 09:17 AM 5/16/98 -0500, you wrote: >My F3 sensors stays at 43k ohms no matter what temp. It is using zener >temp sensor in both non standard to gm . Throttle position sensor has >three colors here are the (note it's not the same as GM) . > >color normal pos wot >green /black 310 ohms 3.7k ohms > >orange/black 3.7k ohms 3.7k ohms > >orange/green 3.7k ohms 0 ohms [snip] ------------------------------ From: "Clive Apps Techno-Logicals 416 510 0020" Date: Sat, 16 May 1998 13:45:03 -0400 (EDT) Subject: Re: Bench Testing ecm-Please Read > > >> Shortly I'll be able to fire up an ecm with a rpm input, VSS, tps, > >>coolant, IAT, map, and hopefully a closed loop O2. Then at the > >>injector/ign end I'll have a dual trace scope, and a recorder type > >>scanner at the aldl. > >> So then I'll be able to verify prom locations, and net res. > >>My question then is this, What type/name/nomenclature/devise > >>would allow me to change the prom without having to reburn it. > >>An emulator would but that is quessing blindly for addresses right?. > >> Would it take a laptop to drive, this other devise?. > >> Has anyone tried the above?. I imagine gm has exactly what I > >>need but wouldn't give me one, even for educational use.. > >> Other than needing 3 more O2 inputs would a OBDII ecm need > >>anything more in the way of inputs?. > >> Cheers a generic prome emulator is a few 100$ these can work from parallel/serial or internal chassis boards they do not require a fast computer since they can be programmed on the fly they allow real time tweaking do a web search for in circuit emulators and see what you find Clive ------------------------------ From: Steven Gorkowski Date: Sat, 16 May 1998 13:38:37 -0500 Subject: Re: Haltech F3 Yes that is true but it is a three wire device , to make it a two wire you need at least one resistor in the sensor assuming it is not using engine ground which I was reading a open each pin to the case of the sensor. The opamp used in this unit is a lm324 for signal conditioning . I have to trace it back. Steve Sandy wrote: > Again, I'm pretty confidant that the sensor on the F3 is an LM335 > from > national semiconductor. > > But, hey, it's still a guess... > > Sandy > > At 09:17 AM 5/16/98 -0500, you wrote: > >My F3 sensors stays at 43k ohms no matter what temp. It is using > zener > >temp sensor in both non standard to gm . Throttle position sensor > has > >three colors here are the (note it's not the same as GM) . > > > >color normal pos wot > >green /black 310 ohms 3.7k ohms > > > >orange/black 3.7k ohms 3.7k ohms > > > >orange/green 3.7k ohms 0 ohms > [snip] ------------------------------ From: Scott Schaaf Date: Sat, 16 May 1998 15:39:52 -0400 Subject: Re: Attachments Dan Zorde wrote: > > Switch to Outlook, I'm using version 8.02.4212 and I've been told I don't have > any attachments (pheewww). So its definitely doable with this version. > I'd reather have a case of the clap as to have OUTLOOK for ANY use, It is easier to get rid of the clap than to get rid of IE4, or Outlook. ------------------------------ From: "Michael Farrugia" Date: Sat, 16 May 1998 13:46:05 PDT Subject: Re: Solved ignition noise problem...thanks all! Is the 3 Amp diode in series for protection against reverse polarity connection ? If it is I have done this in another way - I have put a diode in reverse direction in parallel with the whole circuit, then the whole is connected to the battery through a high currect fuse. Like this if the circuit is connected wrongly the diode becomes a short circuit and blows the fuse. The fuse can also be made some 10A so that it does not drop any signifigant voltage. Sorry if I went off track but I think the above is a good idea. Michael > >That is very similar to what I have, main power through a fuse, a TVS to >ground, 3 Amp diode feeding an inductors and related filter caps. I think >the inductor does more then I think, but who knows, I have not tried it >without it. The diode in series is costly, but I think could be worth it. >The Low Drop out Regs are nice, and they are not that hard to get from >Digi-Key. The best thing is they are drop in, and high temp to boot. > >Sandy > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ------------------------------ From: Ludis Langens Date: Sat, 16 May 1998 16:16:19 -0800 Subject: Re: Prom ID's "Bruce Plecan" wrote: > The 1227148 turbos use a 41 entry. Location 8 in a '148 PROM is in the ignition advance table. > If you can read any gm bins, and look at the 0008 please do so. > I'd really like to see if there is more in common amongt the bins > that we may know. If ya want to e-mail me, or post it to the list > PLEASE do. > Id really like to put together a list of ecm's and prom ID's, Bruce and Wayne: Now you've done it! We'll be talking about the $31 and $42 PROMs and AU$5D MEMCALs. Outsiders will have no idea what we're talking about. Here's a list of "experimental" locations and normal values: 1226864 $E004 aka $004 == 28 or $1C 1226867 $D002 aka $002 == 32 or $20 1226869 $356D aka $56D == 36 or $24 1227170 $3587 aka $587 == 36 or $24 1227148 $37A2 aka $7A2 == 49 or $31 1227747 $D004 aka $004 == 66 or $42 1227783 $3004 aka $004 == 68 or $44 1227748 w/ ACMH $C008 aka $0008 == 72 or $48 1228321 w/ ARRP $C008 aka $0008 == 80 or $50 1227808 w/ ASBX $C008 aka $0008 == 93 or $5D 1228746 $D004 aka $004 == 97 or $61 16136965 $D004 aka $004 == 98 or $62 As you can see, the location of this byte moves around, and sometimes isn't even near the beginning. It is also does not fully identify a specific ECM program. The 1226869 and 1227170 are for different years of the same application, but their PROMs are not compatible. Yet, they have the same code number. [Gee - I had thought this byte was a carefully chosen bit pattern used to quickly detect an empty or defective PROM socket. The first two ECMs I dumped ('6869 and '7170) have the same number and it forms an interesting binary pattern: %00100100.] unsigned long BinToBCD(unsigned long i) {unsigned long t; Ludis Langens return i ? (t = BinToBCD(i >> 1), (t << 1) + (i & 1) + ludis@xxx.com (t + 858993459 >> 2 & 572662306) * 3) : 0;} ------------------------------ From: Walter Petermann Date: Sat, 16 May 1998 19:28:15 -0500 Subject: Re: Angular acceleration John C. Lagerquist wrote: > > Does anyone have any figures for the maximum angular > acceleration of a typical high performance engine (unloaded)? > > John C. Lagerquist (vision_a@xxx.net) > Design Engineer > Control Vision, Inc. > http://www.performancetrends.com/programs.html The DataMite software supposedly has real time data taken from drag racing. Maybe there's a graph of rpm/time. Walter > #include ------------------------------ From: Sandy Date: Sat, 16 May 1998 17:51:31 -0700 Subject: Re: Solved ignition noise problem...thanks all! Good idea, but here is the problem, it's 2, yes, 2 thing in one. ;-) The diode does protect against reverse voltage, but it also keeps the charge on the input filter caps if the voltage dips below what are in the caps. Think of this, you turn on the key, the caps are sitting at 12V, you crank the engine, your voltage drops due to the starter motors large draw. Now the input filter which is at a higher potential then the battery now can't discharge through the diode to help power your starter, it gets applied to the input of the regulator. In pratice, I'm not sure how much it will help, but in theory it is a good idea! Also make sure that on the input you use a bi-directional TVS as who the hell knows what kind and which polarity the spikes can be. Either way will work, but this costs only about a volt in drop, and is not destructive if the battery is reversed. Sandy At 01:46 PM 5/16/98 -0700, you wrote: >Is the 3 Amp diode in series for protection against reverse polarity >connection ? If it is I have done this in another way - I have put a >diode in reverse direction in parallel with the whole circuit, then the >whole is connected to the battery through a high currect fuse. Like >this if the circuit is connected wrongly the diode becomes a short >circuit and blows the fuse. The fuse can also be made some 10A so that >it does not drop any signifigant voltage. >Sorry if I went off track but I think the above is a good idea. >Michael >> >>That is very similar to what I have, main power through a fuse, a TVS >to >>ground, 3 Amp diode feeding an inductors and related filter caps. I >think >>the inductor does more then I think, but who knows, I have not tried it >>without it. The diode in series is costly, but I think could be worth >it. >>The Low Drop out Regs are nice, and they are not that hard to get from >>Digi-Key. The best thing is they are drop in, and high temp to boot. >> >>Sandy >> > > >______________________________________________________ >Get Your Private, Free Email at http://www.hotmail.com > ------------------------------ From: "Bruce Plecan" Date: Sat, 16 May 1998 22:19:59 -0400 Subject: Re: Prom ID's turned out not 2 b ez - -----Original Message----- From: Ludis Langens Subject: Re: Prom ID's >"Bruce Plecan" wrote: >> The 1227148 turbos use a 41 entry. snip > >Bruce and Wayne: Now you've done it! We'll be talking about the $31 and $42 PROMs and AU$5D MEMCALs. Outsiders will have no idea what we're talking about. snip >Ludis Langens ludis@xxx.com Excuse me, I loaded like 25 proms of one sort , and several batches of others, and it looked like a winning idea, I was looking to verify this. OK IT DIDN'T Work. I was looking for a simple solution for quickly identifing how the tables might be organized for an unknown chip. Idea 12,947,294,938,565,924,983.8 that didn't work. Cheers Bruce ------------------------------ From: David Piper Date: Sat, 16 May 1998 22:54:11 -0400 Subject: Re: Wide Range 02 Hi Gar Tnx for info. Guess I will wait and be part of product development/QA, so keep us advised, as usual. Can I go ahead and get the sensors; or are we doing lot buy for price break? What is full P/N info for sensor? I can investigate for group, if required and/or not done already. What is expected volume; 100 or so? TurboDave At 07:58 PM 5/15/98 -0700, you wrote: >On Fri, 15 May 1998 19:36:43 -0700, garfield@xxx.com wrote: > >>we >>ended up choosing the Honda OEM version of the 5-wire ion-pump type >>sensor > >Argh, left out the most important part: lemme retype that as was >intended: > >"we ended up choosing the Honda OEM version of the NTK 5-wire ion-pump >type sensor". > >Gar > > ------------------------------ From: "TBK" Date: Sat, 16 May 1998 21:32:39 -0700 Subject: Re: Prom ID's I think you were talking P4. C3 move around. TK - -----Original Message----- From: Ludis Langens To: Diy_efi Date: Saturday, May 16, 1998 5:01 PM Subject: Re: Prom ID's >"Bruce Plecan" wrote: >> The 1227148 turbos use a 41 entry. > >Location 8 in a '148 PROM is in the ignition advance table. > >> If you can read any gm bins, and look at the 0008 please do so. >> I'd really like to see if there is more in common amongt the bins >> that we may know. If ya want to e-mail me, or post it to the list >> PLEASE do. >> Id really like to put together a list of ecm's and prom ID's, > >Bruce and Wayne: Now you've done it! We'll be talking about the $31 and >$42 PROMs and AU$5D MEMCALs. Outsiders will have no idea what we're >talking about. > >Here's a list of "experimental" locations and normal values: > >1226864 >$E004 aka $004 == 28 or $1C > >1226867 >$D002 aka $002 == 32 or $20 > >1226869 >$356D aka $56D == 36 or $24 > >1227170 >$3587 aka $587 == 36 or $24 > >1227148 >$37A2 aka $7A2 == 49 or $31 > >1227747 >$D004 aka $004 == 66 or $42 > >1227783 >$3004 aka $004 == 68 or $44 > >1227748 w/ ACMH >$C008 aka $0008 == 72 or $48 > >1228321 w/ ARRP >$C008 aka $0008 == 80 or $50 > >1227808 w/ ASBX >$C008 aka $0008 == 93 or $5D > >1228746 >$D004 aka $004 == 97 or $61 > >16136965 >$D004 aka $004 == 98 or $62 > >As you can see, the location of this byte moves around, and sometimes >isn't even near the beginning. It is also does not fully identify a >specific ECM program. The 1226869 and 1227170 are for different years >of the same application, but their PROMs are not compatible. Yet, they >have the same code number. > > >[Gee - I had thought this byte was a carefully chosen bit pattern used >to quickly detect an empty or defective PROM socket. The first two ECMs >I dumped ('6869 and '7170) have the same number and it forms an >interesting binary pattern: %00100100.] > > unsigned long BinToBCD(unsigned long i) {unsigned long t; >Ludis Langens return i ? (t = BinToBCD(i >> 1), (t << 1) + (i & 1) + >ludis@xxx.com (t + 858993459 >> 2 & 572662306) * 3) : 0;} > > > ------------------------------ From: Shannen Durphey Date: Sat, 16 May 1998 23:02:37 -0600 Subject: Re: Bench Testing ecm-Please Read Bruce Plecan wrote: >snip< >Other than needing 3 more O2 inputs would a OBDII ecm need > anything more in the way of inputs?. > Cheers > Bruce All I need now is an EGOR for detecting neural misfirings > when wearing my Cone Shaped Hat I would think that you would need crankshaft sensor signals of various resolution, and/or cam signal, as OBDII uses these for misfire detection. My experiences with OBDII lead me to believe it is much less forgiving of a mistake, and less likely to forget about it afterward. Shannen ------------------------------ From: Ed Date: Sun, 17 May 1998 01:52:06 -0400 Subject: Re: Haltech F3 Graeme Wellington wrote: > > For what it may be worth, Haltech F9 sensors for temperature > have the following temp/reistance specs. (both air intake and > coolant sensors) > > deg F deg C ohm > > 210 100 185 > 160 70 450 > 100 38 1,800 > 70 20 3,400 > 40 4 7,500 > 20 -7 13,500 > 0 -18 25,000 > -10 -40 100,700 Would these specs ring true for the Accel/DFI air and water temp sensors? - -Ed ------------------------------ From: Chris Vondrachek Date: Sun, 17 May 1998 00:05:59 -0700 Subject: My EFI is alive! Dimers, Well I did it! My totally homebuilt EFI project lives. After fouling 3 sets of plugs, the engine fired early friday morning, and boy does it purr. I still have lots of tuning to do...the fuel map is really rough and the O2 sensor correction doesn't work right....oh yeah there is no acceleration enrichment...yet. But other than that it is totally functional, it really does work well. So like I promised...here are the details: Engine: Block/Head- Z-22S block (+0.020), U67 head, 270/0.450 cam, ~10.6:1 Intake/Exhaust- 280Z intake cut and welded, Z-22E throttle body, L-16 cast manifold (O2 sensor in down pipe) Ignition- stock breaker points - a really wacky distributorless igntion is in the works though EFI System: TYPE: Batch firing Speed-Density (uses manifold pressure and rpm w/ air temp to get mass air flow....no MAF box needed, 2 injector events/revolution, all four injectors go at once (soon to be changed)) COMPUTER: custom designed by me, based on Motorola 68HC912B32 16 bit/16 MHz MCU 32 kbytes Flash EEPROM, 2 kbytes RAM, 768 bytes EEPROM. SOFTWARE: also written by me, over 5 pages of assembly code plus 2 fuel maps SYSTEM HARDWARE: Motorola MC33293 quad fuel injector driver, misc signal conditioning, power supply and filtering circuitry all in a Radio Shack metal project box :) SENSORS: manifold abs. pressure (MAP), manifold air temp (MAT), coolant temp, Lambda (O2) system triggering/rpm signal from coil. (MAP, MAT, and CLT are GM, 02 is Bosch) INJECTION STUFF- 4 Bosch injectors out of a Z-22E, also a cold start injector in the plenum, Nissan fuel injection pump (~60 psi), system pressure 40 psi, pressure regulator, custom tube fuel rail, idle air valve set for about 5 minutes from cold. FUEL MAPS: 2 maps: base map and correction map, user defines base map used for open loop, computer modifies correction map to compensate for above map and "other" factors when in closed loop operation. user can modify and reload base map in 10 minutes max. allows sloppy rich or lean and clean A/F settings. 10 MAP levels, 15 rpm levels (will be 15 map levels and 10 rpm levels soon), maps stored in EEPROM for easy modification. lots of changes to come in this area.... Next step is finshing/refining the system including testing, bashing, dropping etc to see if I can get the system to hicup. If not the next phase is to pull the engine off the dyno and drop it into my 2dr for some serious performance analysis :) It will be at Shasta...heck, I might even have the turbo on then too...ah we'll see (10.6:1 + 7 psi = knock, knock, clank!). Well those are just a few of the details :) If anybody has any questions, comments, political statements etc I'd be happy to hear 'em. And yes I do have some pictures of the more important processes...when I get them developed and scanned....I'll post. Chris "EFI'd" Vondrachek /////////////////////////////\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\/////////////////////////// Chris Vondrachek chris@xxx.edu winter: EE student (junior), University of Portland President & Founder of the U of P Formula SAE Team summer: Datsun 510 nut, in my garage: Newberg, Oregon '70 2dr 510 - (soon to get a EFI'd LZ-22) '71 4dr 510 - (will get hand me down L-20B from above) '71 2dr 510 - (race car project...someday) '73 2dr 510 - (parts car) '85 VG30E - (twin turbo EFI engine by Shasta '99.....or I own Kelvin a pizza) ------------------------------ From: "Joachim M. Wagner" <1028-156@xxx.de> Date: Sun, 17 May 1998 10:02:22 +0300 Subject: Re: Bench Testing ecm-Please Read & Very important question Has any body tried to check if ECU-programs are dynamically working, normally all the programming is done for constant rpm! So what about using small fuzzy control unit to improve engine parameters dynamically, e.g. spark advance for instantaneous driving and therefore self adjusting for all loads and gears, because: EVERY GEAR NEEDS A DIFFERENT ECU-PROGRAM for optimum acceleration! (Did you know that?) Joachim - ---------- > Von: Bruce Plecan > An: diy_efi@xxx.edu > Betreff: Re: Bench Testing ecm-Please Read > Datum: Samstag, 16. Mai 1998 18:19 > > From: Matthew Harding > Subject: Re: Bench Testing ecm-Please Read > > > >> Shortly I'll be able to fire up an ecm with a rpm input, VSS, tps, > >>coolant, IAT, map, and hopefully a closed loop O2. Then at the > >>injector/ign end I'll have a dual trace scope, and a recorder type > >>scanner at the aldl. > >> So then I'll be able to verify prom locations, and net res. > >>My question then is this, What type/name/nomenclature/devise > >>would allow me to change the prom without having to reburn it. > >>An emulator would but that is quessing blindly for addresses right?. > >> Would it take a laptop to drive, this other devise?. > >> Has anyone tried the above?. I imagine gm has exactly what I > >>need but wouldn't give me one, even for educational use.. > >> Other than needing 3 more O2 inputs would a OBDII ecm need > >>anything more in the way of inputs?. > >> Cheers > > > >isn't that what the software, and replacement memcal boards from these guys > > >does? > > Yes but at $700 (AUS) it would get expensive to do a bunch of > different ecms, I can find some/most of the tables, which is what > I think a good part of the information that your paying for with their > system. > > > >http://white.aljan.com.au/~bradhost/ > > > >our Aussie Management systems have gotta be real close to any delco unit > >you have over there..... > > > The other issue is I haven't heard of a distributor here in the US, > and I get lerry about international problems. > Cheers > Bruce > ------------------------------ End of DIY_EFI Digest V3 #227 ***************************** 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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