DIY_EFI Digest Saturday, March 13 1999 Volume 04 : Number 157 In this issue: diesel home dyno RE: AutoMeter (Aluminum or Platinum???) Re: AutoMeter (Aluminum or Platinum???) Re: Wiring harness for late model GM trucks Re: AutoMeter (Aluminum or Platinum???) Fwd: Recommend an a/f meter? Re: Wiring harness for late model GM trucks Dangerous injection ideas... EFI in a boat 3800 supercharged, please read! Re: Recommend an a/f meter? Re: MAP Q? Re: Dangerous injection ideas... Re: AutoMeter (Aluminum or Platinum???)Found Low cost EGT RE: ProJection mods, was Re: New to list, have a question. Re: ProJection mods, was Re: New to list, have a question. See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Wed, 10 Mar 1999 17:19:33 +0000 From: xxalexx@xxx.com Subject: diesel home dyno Mar 4, 99 Design News has rpm sensor that uses a piezoelectric sensor and a alligator clip attached to fuel line. Scope trace shows shows other cylinders. Circuit uses a ICL7611 charge amp. alex ------------------------------ Date: Wed, 10 Mar 1999 16:35:44 -0600 (CST) From: Roger Heflin Subject: RE: AutoMeter (Aluminum or Platinum???) On Wed, 10 Mar 1999, Jeray, Rick wrote: > I use the Cyberdyne gage, it does respond slow but its good enough to set > up my TBI pressure. > It displays 0-30 psi in .2 increments, might not be enough for MPI. Its > digital and rectangular. > > I think the issue with it is that the blowers and N2O kits gneerally work by boosting (significantly) the fuel pressure, and that is how they get more fuel into the engine, and the gage apparently does not respond fast enough to this boosting of the fuel pressure. I think stock the f-bodies run 45 psi, and I have heard of the kits boosting the pressure up to 60psi or more, and this is all at the same rate as the rpm is rising (for a blower). It may be less of a problem in a N2O car since it should only boost once, and then stay steady, where in the blower the pressure is rising at a fairly rapid rate, with rpm (rising boost). Roger ------------------------------ Date: Wed, 10 Mar 1999 17:38:57 +0000 From: xxalexx@xxx.com Subject: Re: AutoMeter (Aluminum or Platinum???) Aircraft gauges can or used to be found surlpus. Response can depend on ground. sheath ground is faster. You could try a ceramic protection tube, if you have a smooth engine. alex > >Dan, > > > > I feel your pain, man. I don't think you're expecting too much for too > >little, either. Autometer is definitely trying to act like microsoft lately. > >There is a sliver of hope, though. Cyberdyne advertises an electric fp gauge > >with sender for under $80; the downside, it's digital and looks a little > >cheesy, but fits the 2 1/16" holes, I think. Not sure which, Jegs or Summit > >carries it. As far as the egt, I don't know. > > > >Daniel > > Try Barry Grant for the EGT--dunno their price, but always good stuff there. > > Any T/C with the same letter code ("K" , for instance) will interchange. > The letter code designates the metal pairing. The trick with EGT T/C probes > is to combine RUGGED with low mass (for quick response). These two > qualities may not happen in the same piece for cheap. > > Regards, Greg > > > > > > > ------------------------------ Date: Wed, 10 Mar 1999 17:43:43 -0500 From: Shannen Durphey Subject: Re: Wiring harness for late model GM trucks If someone finds more complete info please post. My source says they're some type of forward lamp harnesses for P chassis vehicles, 1990-94. Shannen Ken Kelly wrote: > > Eugene, > I would like to look at that harness add! I bought a > harness at Carlisle that sounds like it might be the same. > It was sold by a tool dealer that had at least 100 of them. > On Thursday they were $50, I bought it on Sat for $25. It is > a Chassis wiring harness, not an Engine harness. I haven't > used it yet, but was planning to use it in a street rod. It > has a GM fuseblock with the 1980's style spade fuses, not > the minature 1990's style spade fuse. It has a lot of > cabling and plugs attached, but I haven't even opened it out > yet. > > Ken > > Eugene Jones wrote: > > > > ---------- > > > From: Jim Yeagley > > > To: diy_efi@xxx.edu > > > Subject: Wiring harness for late model GM trucks > > > Date: Tuesday, March 09, 1999 8:56 PM > > > > > > I found this in my browsing: > > > > > > Manufacturer's overstock buyout on wiring harness assemblies for late > > model > > > GM trucks, busses, vans and RV's. These harnesses are priced at pennies > > on > > > the dollar compared to original distributor cost ! MFG P/N: 12069696, and > > > also MFG P/N: 12069591 > > > > > > > > > Does anyone know if one of these will work with that 7747? > > > > > > > > Jim > > Please send info on where to purchase these, I'm interested in one now !! > > thanks much. > > Eugene Jones > > jtvette@xxx.net ------------------------------ Date: Wed, 10 Mar 1999 18:30:54 -0500 From: "Clarence L.Snyder" Subject: Re: AutoMeter (Aluminum or Platinum???) What about Westach? I have 2" singles listed at $130 canadian, duals at $230, standard probes at $60 and quick response at $70 ------------------------------ Date: Wed, 10 Mar 1999 15:40:25 -0800 From: Jeff Moskovitz Subject: Fwd: Recommend an a/f meter? I've been a lurker on this list for some time, but I finally have a question: could someone on the list recommend a good/cheap a/f meter setup that uses a wide band EGO, and possible a good source for same? TIA, Jeff ------------------------------ Date: Wed, 10 Mar 1999 18:44:36 -0500 From: "Bruce Plecan" Subject: Re: Wiring harness for late model GM trucks - -----Original Message----- From: Shannen Durphey To: diy_efi@xxx.edu> Date: Wednesday, March 10, 1999 6:14 PM Subject: Re: Wiring harness for late model GM trucks I got one of each coming, they say they got lots of them Bruce >If someone finds more complete info please post. My source says >they're some type of forward lamp harnesses for P chassis vehicles, >1990-94. >Shannen > >Ken Kelly wrote: >> >> Eugene, >> I would like to look at that harness add! I bought a >> harness at Carlisle that sounds like it might be the same. >> It was sold by a tool dealer that had at least 100 of them. >> On Thursday they were $50, I bought it on Sat for $25. It is >> a Chassis wiring harness, not an Engine harness. I haven't >> used it yet, but was planning to use it in a street rod. It >> has a GM fuseblock with the 1980's style spade fuses, not >> the minature 1990's style spade fuse. It has a lot of >> cabling and plugs attached, but I haven't even opened it out >> yet. >> >> Ken >> >> Eugene Jones wrote: >> > >> > ---------- >> > > From: Jim Yeagley >> > > To: diy_efi@xxx.edu >> > > Subject: Wiring harness for late model GM trucks >> > > Date: Tuesday, March 09, 1999 8:56 PM >> > > >> > > I found this in my browsing: >> > > >> > > Manufacturer's overstock buyout on wiring harness assemblies for late >> > model >> > > GM trucks, busses, vans and RV's. These harnesses are priced at pennies >> > on >> > > the dollar compared to original distributor cost ! MFG P/N: 12069696, and >> > > also MFG P/N: 12069591 >> > > >> > > >> > > Does anyone know if one of these will work with that 7747? >> > > >> > > >> > Jim >> > Please send info on where to purchase these, I'm interested in one now !! >> > thanks much. >> > Eugene Jones >> > jtvette@xxx.net > ------------------------------ Date: Wed, 10 Mar 1999 15:48:37 -0800 From: Vinnie Moscaritolo Subject: Dangerous injection ideas... At 12:27 AM -0500 3/10/99, "Bill the arcstarter" wrote: > > I've seen comments about the Holley TBI heads. You can buy this unit > as a replacement part for about $289 or so. There is also a similar > unit w/o an AIV motor (air stepper). Anyone know if I can get the > proper wiring connectors to fit one of these TBIs? If you mean the injector connectors, they are not WeatherPack. Typical Holley, they used non-standard parts. I am curious myself where to get them since I am building a custom harness. The TPS is however a three pin WeatherPack and you can get them from Summit (as a Painless wiring part). Incidentally, WeatherPack's are made by (Delphi Automotive) Packard Electrics special product division there is info on the parts at http://www.delco.com/pdf/packardpdfs/weatherpkds.pdf good luck Vinnie Moscaritolo http://www.vmeng.com/vinnie/ PGP: 3F903472C3AF622D5D918D9BD8B100090B3EF042 - ------------------------------------------------------- Those who hammer their swords into plows, will plow for those who don't." ------------------------------ Date: Thu, 11 Mar 1999 01:26:38 +0100 From: NIls =?iso-8859-1?Q?Bj=F6rkman?= Subject: EFI in a boat Hi I´m pretty new on this list I have been thinking of implementing EFI on my boat engine for a while now I wonder if there are anyone with experiance of EFI on engines for boats. Im planing to design my own EFI based on an PIC16C74A microcontroller. Im pretty familiar whith that and have all nesessary equipment and experience to make the design and program. My boat is a 20 ft long hardtop boat at aprox 1 ton. Engine is Volvo Penta AQ145. It´s a 2.3 liter, 4cylinders. aprox 145 hp, dual solex carbs, overhead camshaft. To day the top speed is 25 knots at 5500 rpm, but it takes LONG time to get there. I hope to be able to move the torque curve a bit downwards so it will accelerate in a more sufficient way. I know I have to experiment with different camshafts and so on to get what I want from the engine. Best regards Nisse ------------------------------ Date: Wed, 10 Mar 1999 19:25:29 -0500 From: "Kevin" Subject: 3800 supercharged, please read! This is a multi-part message in MIME format. - ------=_NextPart_000_0004_01BE6B2B.C1CC25A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi all.. the question I pose is a tough one I believe. I own a 1988 buick Lesabre T-type with a 3800 series I in it.=20 I am changing the engine for a 1997 3800 series II supercharged.=20 What I would like to do is run the motor off of the stock computer. I = figure what I need to change is the prom, or the information on it = anyways.=20 I think I already got the correct binary image of my prom from one of = the link sites.. but I would like to get an image of the 1997 grand prix = GTP codes.. so that I can program mine the same.. any other suggestions = on reprogramming the unit? or should it just run ok off the stock = motor? Somone else I know has done this swap... with success.. but he hasn't = touched the computer yet.. he say's it's running fine however the check = engine soon light has been on since the swap. I'm sure things like the = BLM #'s, and spark advance are different.. please email me with any help = you might have, thanks again Kevin - ------=_NextPart_000_0004_01BE6B2B.C1CC25A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
  Hi=20 all.. the question I pose is a tough one I believe.
 
I own a 1988 buick Lesabre T-type with a 3800 series = I in it.=20
I am changing the engine for a 1997 3800 series II=20 supercharged.
What I would like to do is run the motor off of the = stock=20 computer. I figure what I need to change is the prom, or the information = on it=20 anyways.
I think I already got the correct binary image of my prom = from one=20 of the link sites.. but I would like to get an image of the 1997 grand = prix GTP=20 codes.. so that I can program mine the same.. any other suggestions on=20 reprogramming the unit? or should it just run  ok off the stock=20 motor?
 
Somone else I know has done this swap... with = success.. but he=20 hasn't touched the computer yet.. he say's it's running fine however the = check=20 engine soon light has been on since the swap. I'm sure things like the = BLM #'s,=20 and spark advance are different.. please email me with any help you = might have,=20 thanks again
 
Kevin
- ------=_NextPart_000_0004_01BE6B2B.C1CC25A0-- ------------------------------ Date: Wed, 10 Mar 1999 19:35:18 -0500 From: "Bruce Plecan" Subject: Re: Recommend an a/f meter? - -----Original Message----- From: Jeff Moskovitz To: DIY_EFI@xxx.edu> Date: Wednesday, March 10, 1999 6:53 PM Subject: Fwd: Recommend an a/f meter? Boy ya hear of one, let me know Bruce >I've been a lurker on this list for some time, but I finally have a >question: could someone on the list recommend a good/cheap a/f meter >setup that uses a wide band EGO, and possible a good source for same? > >TIA, > >Jeff > ------------------------------ Date: Wed, 10 Mar 1999 19:31:57 -0600 From: Tom Sharpe Subject: Re: MAP Q? Jason wrote: > < run pretty high boost, so I need a sensor that can cope with 2 bar > boost. > Do anyone know of a good source for these. Is the sensor from > electromotive or haltech any good? Are there cheaper alternatives?>> Digi-key pg 560 Sensym 1-30/100 0-5V $47.70Digi-key pg 558 Lucas 0-30/50/100psi 0-100mv $17.00 Tom S ------------------------------ Date: Wed, 10 Mar 1999 19:26:59 -0600 From: "Jeffrey T. Birt" Subject: Re: Dangerous injection ideas... You can use the acetylene regulator with propane. They are chemmically compatable as far as the gases are concerned. I would not reccomend trying to modify such a unit and use it in an application where it could get oily or greasy. The regulator and oil\grease don't mix. I work for a welding equipment supply\service company and have heard of several horrer stories from our apparatus repair people. Jeff Birt Bill the arcstarter wrote: > OK - now I'm dangerous. > Just ordered a linear actuator stepper motor from C&H surplus. Also > got an acetylene regulator and a shaft encoder. > > I'm thinking about building some sort of DIY-EFI propane system. Am > planning on using the linear stepper motor to replace the pressure > adjustment of the acet. regulator to dispense propane into the test > engine. I think I can get away with using an acetylene regulator with > propane. Anyone think otherwise? I know the pressures are similar and > I also think that chemically they call for the same/similar type of > hosing too. But I may be wrong. > > If I stay with propane I'll probably start out with using the riding > lawn mower as proof of concept. Then I'll think about converting it to > gas (or maybe not) and putting it on in lieu of the shagged Q-jet on the > 350. > > So if Holley can build a system which computes (via lookup table) an > injection volume as a function of engine rpm and TPS - well I bet I can > too. > > I'm thinking about using one PIC processor to manage this stepper > motor, and another to read rpm/tps, do the table stuff and feed the > final "fuel amt" to the 1st PIC. A serial EEPROM device will contain > the output mapping. You can get single eeprom parts, 8 pin ICs with up > to 32Kbytes of memory. Thats one heck of a lookup table. > > TBD is how/if I'll arrange for the hacking/massaging of this table. > Comments anyone? > > I've seen comments about the Holley TBI heads. You can buy this unit > as a replacement part for about $289 or so. There is also a similar > unit w/o an AIV motor (air stepper). Anyone know if I can get the > proper wiring connectors to fit one of these TBIs? > > I'm also wondering if I should go with some sort of MAP sensor instead > of the tps, and just use tps for accel pump stuff... > > Anyone have any clues as to some minimum resolution of these lookup > tables? I know that the GM ECUs use a megar table, something like 4x4 > or so. Anyone also know a minimum precision of the output of this table > - ie 8 or 16 bits? Thanks and wish me luck! > > Comments invited. > -Bill > > > Get Your Private, Free Email at http://www.hotmail.com ------------------------------ Date: Wed, 10 Mar 1999 20:59:56 EST From: AL8001@xxx.com Subject: Re: AutoMeter (Aluminum or Platinum???)Found Low cost EGT Pegasus Auto Racing Supplies 1-800-688-6946 www.execpc.com/~pegasus Single EGT guage for $50. Dual needle guage is $ 86. Thermocouple probe ( attached to a hose clamp, drill a 3/16 hile in the header pipe) with 44" of armored cable is $ 42. Extension cables are 4, 6 , 8 Ft $10 to $12. Four position switch with 8 ft wires $ 33. The brand is unknown. I've bought lots of stuff from Pegasus over the years and they allways have had good products. They deal mostly in open wheel road race and some sedan RR stuff. Harold ------------------------------ Date: Wed, 10 Mar 1999 18:15:35 -0800 (PST) From: andy quaas Subject: RE: ProJection mods, was Re: New to list, have a question. No gots. I sold the whole setup to someone and i gave it to them. The traces were shot, big time. They were burnt worse than any i have seen before. The inside of my truck actually smoked up! Andy - ---"Van Setten, Tim (AZ75)" wrote: > > > > > ---------- > > From: andy quaas[SMTP:realsquash@xxx.com] > > Reply To: diy_efi@xxx.edu > > Sent: Tuesday, March 09, 1999 2:40 PM > > To: diy_efi@xxx.edu > > Subject: Re: ProJection mods, was Re: New to list, have a question. > > > > I used to have a 4Di on my truck, then the IAC wires shorted to the > > intake manifold, then the IAC driver chip burned out on the ECM, > > taking with it traces that run the injector drivers. > > Andy > > efi@xxx.com > > realsquash@xxx.com > > > Andy, do you still have that unit? Maybe it's fixable.......Tim. > _________________________________________________________ DO YOU YAHOO!? Get your free @xxx.com ------------------------------ Date: Wed, 10 Mar 1999 18:17:28 -0800 (PST) From: andy quaas Subject: Re: ProJection mods, was Re: New to list, have a question. I do have them, but this SAP project at work is taking all of my time! Andy - ---cloud@xxx.edu wrote: > > At 01:40 PM 3/9/99 -0800, Andy Quaas wrote: > >The website is www.genevaonline.com/~efi > > > >I haven't updated it in a long time, but all file should still be > >there in www.genevaonline.com/~efi/files > > you don't have the analog PJ files I sent you ??? (nope, feelings not > hurt, just noting that they're not there ??) > > > Tom Cloud > _________________________________________________________ DO YOU YAHOO!? Get your free @xxx.com ------------------------------ End of DIY_EFI Digest V4 #157 ***************************** 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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