DIY_EFI Digest Wednesday, 24 February 1999 Volume 04 : Number 129 In this issue: Re: wanted: aftermarket efi box Re: Engine Control Question Re: Saginaw fittings Re: TH-400 help RE: injector size and bin questions RE: injector size and bin questions Re: ECM wiring harness help Re: Saginaw fittings See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: "Bruce Plecan" Date: Wed, 24 Feb 1999 00:24:07 -0500 Subject: Re: wanted: aftermarket efi box - -----Original Message----- From: Michael Kent To: diy_efi list Date: Tuesday, February 23, 1999 11:37 PM Subject: wanted: aftermarket efi box Try at the GN/Ttype list there are some guys selling DFIs since going to FPs Bruce > >I need a QUICK solution to a long standing problem with a buddies project >car. Looking for an aftermarket efi box w/ software, could be DFI, TECII, >Haltech, whatever. You got it, I want it. > >thanx, > >MK > > ------------------------------ From: Raymond C Drouillard Date: Tue, 23 Feb 1999 01:13:26 -0500 Subject: Re: Engine Control Question >><<>When speeding up from a dead stop at WOT, the fuel injector pulse width is >>>around 12.2ms. Once it goes above 3700 rpm or so, it starts to slowly >>>decline until it hits 5200 (right before shifting). At 5200 rpm the pulse >>>width is 9.8ms. Why would this be? Is this so the engine doesn't melt :), >>>or for emissions reasons. As the engine speeds up, it's volumetric efficiency goes down. In other words, it is pulling in less air for each revolution. That means it needs less fuel for each revolution - hense, a shorter duration. Maximum VE will be at the maximum torque part of the curve. After that point, torque (and VE) goes down as engine speed increases. Power continues to go up because power = torque * speed. Power finally drops off when the effect of the dropping torque overtakes the effect of the increasing speed. If this stayed at 12.2ms right to the shiftpoint, >>>would this generate more power? Nope... it would just run rich. Ray ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866] ------------------------------ From: "Bruce Plecan" Date: Wed, 24 Feb 1999 00:32:10 -0500 Subject: Re: Saginaw fittings - -----Original Message----- From: Fran and Bud To: diy_efi@xxx.edu> Date: Wednesday, February 24, 1999 12:20 AM Subject: Saginaw fittings Might try www.earlsperformance.com Bruce >Does anyone know of a source of "Saginaw to hose barb" or "Saginaw to AN" >fittings at less than $10 each ?? My local NAPA has good high pressure >fuel filters at under $10 but most of them have female Saginaw inlet/outlet >but no source for fittings. > >Any suggestions for low cost, high pressure, fuel filters with either hose >barbs or 45 degree SAE inlet/outlet fittings?? > >Thanks, >Bud > ------------------------------ From: "Bruce Plecan" Date: Wed, 24 Feb 1999 00:44:59 -0500 Subject: Re: TH-400 help - -----Original Message----- From: Marc Piccioni To: 'diy_efi@xxx.edu> Date: Wednesday, February 24, 1999 12:30 AM Subject: RE: TH-400 help Before deleting it I'd look at installing it. I'd reseach if it's a 2000 ppm, or 4000 ppm deal, and if so then just use a Jags That Run speedometer cable inline device. Coast down enleanment/IAC reset works off of VSS "ususally". Your PCM may be all different from what I've seen so far.. Bruce >2. Does anyone see any problems with deleting the speedo sensor, since the >speedometer on my car takes its reading from the differential, and I'll be >using a manual transmission calibration with the PCM... (96 LT1) I think >the only thing that a manual cal uses the speedo for is idle speed, and I >can do without that. Error codes aren't a concern... >Thanks a lot, >Brock ------------------------------ From: bearbvd@xxx.net (Greg Hermann) Date: Tue, 23 Feb 1999 22:47:51 -0700 Subject: RE: injector size and bin questions >Injectors may be rated several ways, generally static flow and dynamic. >Static is full on, dynamic is cycled at various duty cycles. Fuel pressure >is up to the maker, but often is 3 bar, (3x barometric) or 3 x 14.7 PSI. > >Ward \ Close, but Monica is out to lunch! 1 bar =100,000 kPa=14._5_ psi, not 1 atm. or 14.7 psi > >-----Original Message----- >From: owner-diy_efi@xxx.edu >[mailto:owner-diy_efi@xxx.edu]On Behalf Of Doug >Mansfield >Sent: Tuesday, February 23, 1999 9:58 AM >To: Do-it-Yourself Fuel Injection Mailing List >Subject: injector size and bin questions > > > >First fuel injector size: > >What conditions are fuel injectors rated under. If it is rated for >35lbs/hr, what fuel pressure and air pressure are these rated at? > > >Binaries: > >Do the rom dumps from the GM ECMs contain both the "program" and the "data"? > > >Thanks > >Doug ------------------------------ From: bearbvd@xxx.net (Greg Hermann) Date: Tue, 23 Feb 1999 22:49:27 -0700 Subject: RE: injector size and bin questions >Injectors may be rated several ways, generally static flow and dynamic. >Static is full on, dynamic is cycled at various duty cycles. Fuel pressure >is up to the maker, but often is 3 bar, (3x barometric) or 3 x 14.7 PSI. > Hit send too quick there-- 1 bar = 100 kPa, or = 100,000 Pascals, still equal to 14.5 psi. ------------------------------ From: Shannen Durphey Date: Wed, 24 Feb 1999 01:13:39 -0500 Subject: Re: ECM wiring harness help I'm intrigued. How'd ya come by the powerplant? Shannen Ward Spoonemore wrote: > > MY 1999, 5.7l vortech is running swell on a 1227747 ECM in my 1990 p/u, its > a lot easer to deal with as a converion. > Ward > ------------------------------ From: Shannen Durphey Date: Wed, 24 Feb 1999 01:37:35 -0500 Subject: Re: Saginaw fittings I don't know current prices, but I happen to remember someone posting a list of fitting sources once. ; ) Search for "fuel line fittings updated" in the archives. Shannen Fran and Bud wrote: > > Does anyone know of a source of "Saginaw to hose barb" or "Saginaw to AN" > fittings at less than $10 each ?? My local NAPA has good high pressure > fuel filters at under $10 but most of them have female Saginaw inlet/outlet > but no source for fittings. > > Any suggestions for low cost, high pressure, fuel filters with either hose > barbs or 45 degree SAE inlet/outlet fittings?? > > Thanks, > Bud ------------------------------ End of DIY_EFI Digest V4 #129 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".