DIY_EFI Digest Saturday, October 23 1999 Volume 04 : Number 597 In this issue: Re: DIY_EFI Digest V4 #596 intro Injector listing on ftp site Re: Multiport Injection setups and Design Converting a Performer manifold and TBI to TPI... GM Fuel Injector Problems See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 22 Oct 1999 16:42:11 +0000 From: "Alex C. Peper" Subject: Re: DIY_EFI Digest V4 #596 > Subject: AFM to Maf Conversion > > Has anyone made a "box" which would allow me to replace my AFM with > a MAF sensor. Presently I have L-Jetronic injection and I am tired of > having to replace my AFM on a regular basis. > > Kelly M > I made a L-Jet intercecpt box a few years ago for O2 sensor catalyst retrofit. I started to work on Ford MAF to L-jet box with list member. Alex ------------------------------ Date: Fri, 22 Oct 1999 19:10:14 -0400 From: David Brode Subject: intro Hello all, This is an intro note. I'll be lurking to try to see if I can possibly learn enough to go with efi on my ongoing project. It's a twin turbo'd/N20 511 cubic inch pro street style '67 Chev pick up. I've looked at the archives and there seems to be talk here about turbos, intercoolers and such. I'm a layman [sheet metal worker] and know next to nothing about electronics. I know that efi would be much better than my blow through the carb plan. I hope to learn if it is doable with mostly junkyard parts. Thanks for the list. Dave Brode Frostburg Maryland ------------------------------ Date: Fri, 22 Oct 1999 19:31:08 -0400 From: Shannen Durphey Subject: Injector listing on ftp site I've uploaded a very nice injector application/flow listing, complements of Jason D. (aka Spectro Coating Corp.). Although it's not complete, it has not got some of the errors that other www injector lists contain. If anyone has info to add or to complete the list, or general comments, please send it to Jason or myself. ftp://efi332.eng.ohio-state.edu/incoming/fuelflow.txt Shannen ------------------------------ Date: Fri, 22 Oct 1999 19:37:47 -0400 From: Shannen Durphey Subject: Re: Multiport Injection setups and Design > Date: Fri, 22 Oct 1999 16:57:35 +0000 > From: Ned Williams > Subject: Multiport Injection setups and Design > > Howdy everyone, > > I'm new to the list so please ecuse any mishaps on this post,my > first. I am in the process of fabricating a multi Port fuel injection > for Full Size Jeeps that are equipped with the AMC 360 or 401 engines. I > have been in contact with several efi and dfi vendors,and currently have > a metal fabrication discussion going on with one of the design engineers > over at Holley. What I was wondering, was a while back on one of the > little jeep(cj's and wranglers) websites someone coverted a amc straight > 6 to EFI using a system off a chevy astro, the ECM was reprogrammed for > him by someone off this list. So I am curious has anyone attempted such > a ecm reprog on say a Ponitac ECM out of a 90 an up v8 based Firebird/TA > or a 90 and up Camaro or Vette? At the current time I am thinking of > using as much as I can from a 94 camaro I found junked, I would like to > use the injectors,ecm and as much of harness as possible, based on > intake spacing I already know I will need to fab my own fuel rails and > mod an existing manifold. Due to the fact that I am on a limited budget > been considereing using a stock jeep v8 intake, they are very basic > spread bore designs with a single plane underneath. My current thought > is to machine out the spread bores,leaving an open faced single plan > manifold. > For my air valve the Holley engineer suggested using an old quadra jet > and removing the venturies, which is what he did on his own custom > system. > > any thoughts or suggestions would be welcome Sure. For a port setup, you could use a 2bbl throttle body from a port fuel injected Cadillac, and a Holley 4bbl to GM TBI adapter. This will give you a nice start. The 90 Camaro tpi engine uses a 1227730 ecm, and there is tuning software available for it. There are injector sizing formulas and lists available in the archives, on the ftp site, and around the web. In fact, you should spend some time searching the archives for info, as there is a plethora of it available. One member has adapted a tbi setup to his jeep, along with an early pickup computer. This may be the simplest, fastest way to get a taste for efi swaps. Happy hunting. http://efi332.eng.ohio-state.edu/diy_efi/ Shannen > > thanks > Ned > > ------------------------------ > ------------------------------ Date: Sat, 23 Oct 1999 00:03:51 -0400 From: "Stephen R. Cauffiel" Subject: Converting a Performer manifold and TBI to TPI... Hey guys, I think I remember a thread recently (here or on the Third gen list) about drilling an Edelbrock Performer manifold for TPI injectors and running a TBI with injectors removed as the throttle body... Am I smoking crack? I know that Edelbrock has their $2000 version of this, but if I could afford that... This would work with the TBI harness, wouldn't it? You would have to rewire it so that the left injector wiring fired the left bank of TPI injectors, and the right injector wiring the right bank... Has anyone done this? Would it work? If you could burn your own chips/reprogram the computer to compensate for changes... Would this work on a 383 SBC? Please, unless you are going to stroke me a check, don't say "Just buy the MiniRam/SuperRam/HighDollarRam and call it a day." If I could afford stuff like that I wouldn't even be asking this kind of question... Thanks for any help, Steve "It could probably be shown by facts and figures that there is no distinctly native American criminal class except Congress." --Mark Twain ------------------------------ Date: Sat, 23 Oct 1999 02:30:24 EDT From: CApops@xxx.com Subject: GM Fuel Injector Problems Dear efi, I saw a rather criptic message I think you had posted on http://www.lindertech.com/autolink.htm about problems with your GM fuel injectors. Do you know of any legal action anyone is taking to force them to have a recall on them? My car isn't out of warranty yet but, when my mechanic told me that GM thinks it's the fuel's problem I couldn't believe it. Why isn't every other car on the road having problems? He then said that they've come up with a cleaning procedure every 15000 miles to the tune of about $65. I'm not paying for an engineering mistake that they are not going to admit to. I'm an engineer who also works in the auto industry and this is exactly what it sounds like to me. Please let me know any more you've heard about this subject. Thanks a lot, - -CApops@xxx.com ------------------------------ End of DIY_EFI Digest V4 #597 ***************************** 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".