DIY_EFI Digest Saturday, December 11 1999 Volume 04 : Number 689 In this issue: Motronic Version for Audi V8 Engine - Model PT Newbie needs sage advice. stoich cristmas ??? how does tbi work Re: how does tbi work See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 10 Dec 1999 16:42:46 -0800 From: "Buchholz, Steven" Subject: Motronic Version for Audi V8 Engine - Model PT A friend has an engine from an Audi V8 quattro that he is installing in another car. It has a Motronic control box, but he was looking to find which version of the Motronic system it has. I may be able to get the Bosch number on the ECU soon, but I thought I'd post to see if anyone knew based on the engine code. I've been able to determine that the 4.2 liter ABH engine code uses Bosch Motronic M2.3.2, but this would be for the 3.6 liter PT engine code installed in Audi V8 Quattros until MY 1992. TIA! Steve Buchholz San Jose, CA (USA) ------------------------------ Date: Sat, 11 Dec 1999 02:19:55 +0100 From: "Espen Hilde" Subject: Newbie needs sage advice. Hi ! If you want to change what you have it better be to something better? I would like to have a system that could stage two sets of low ohm injectors. Peek and hold.I would like it to be sequential to get better milage, and its better to inject once at low milsec than even shorter twice,at high rpm you dont want to spill the time you have to inject by opening and closing your injectors more than nessesary.(my guess..) If this is not enough to cope with the big hp band of your engine you could allso consider a fuel pressure gain control. Offcourse you have to have controll of ignition as well, and software to handle the pecularities of turbo charging.The possibility of using map or tps at certain parts of the map is an advantage if you run into occilation problems. To be able to easy adjust the system on the run is essensial. Allso to be able to log data as you drive. Allso a system that can use as much of the sensors you allready have. Nothing realy good comes cheap.....this applyes to ECUs as well ecept if you learn to dig into OEM ECUs but they are all lacking in the arias of extreme hp output that you are . Weber Marelli makes a good ecu for turbo charging , used in Lancia Integrale .Its sequential and well hacked. Using a GM system you can join GMECM mailing list and get help from Mr Santa Bruce and all his good helpers at CSH HQ. My first choice for non OEM would be Zytec or simular.But thats just my own oppinion........ Offcourse its not worth all the trubble.......If you use this time to just beeing good and help someone you could make a big difference in someones life.And it would make you feel much better than beeing faster /more tecnical advanced than the next guy....... The Olympic ideals is killing the human race...... But DIY EFI is allmost like heaven , help others and share what you have.. Its just a little sick, ,just doing digest mode..... But beeing a gearhead like myself I could not have resisted to GO for it.... Your nice Porsche deserves it! Please keep us posted. Espen Hilde > From: Rodney_L_Wiggins@xxx.com > Subject: Newbie needs sage advice > The car is an 86 Porsche 944 turbo with early Bosch Motronic converted from vane > to hot wire. ------------------------------ Date: Sat, 11 Dec 1999 02:57:19 +0100 From: "Espen Hilde" Subject: stoich cristmas ??? Hi ! Sorry for beeing in the philosophic corner today..... Maybe this intens interest for stoich is trying to tell us something. I think everything in the world can tell us things if we are open for it. Why is it at just at 14,7 that everything falls into place. 7 is a saicret number......Is it that we should reach for the perfect love? Then everything falls into place and the waste is harmless. The perfect balance is better than the extreme? When you reach the right balance something extraordinary happens? Its not facts , it cant be given to us, because then you cant decide for your self. We have to belive. Espen ------------------------------ Date: Fri, 10 Dec 1999 21:46:11 -0500 From: "Larry Carter" Subject: how does tbi work This is a multi-part message in MIME format. - ------=_NextPart_000_0011_01BF4357.F98AC460 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I presently own a 79 fiat spider that I would like to convert to tbi = (from an 85 4 cylinder chevy cavalier). i have a 1.8 liter engine in the = fiat, the chevy is a 2 liter engine. does this year tbi operate in open = and closed loop mode. what sensors would i have to include, which could = i ignore. i understand that the chevy injector works mainly off the = distributor to know when to supply fuel, using the throttle position, = engine temp and maf sensor to determine how much fuel to inject. am i = out of my mind or is this a (with some work) doable project. enjoy this forum, even if i need a ladder for some of the discussions, = as they are over top of my head. larry c. - ------=_NextPart_000_0011_01BF4357.F98AC460 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I presently own a 79 fiat spider that I = would like=20 to convert to tbi (from an 85 4 cylinder chevy cavalier). i have a 1.8 = liter=20 engine in the fiat, the chevy is a 2 liter engine. does this year tbi = operate in=20 open and closed loop mode. what sensors would i have to include, which = could i=20 ignore. i understand that the chevy injector works mainly off the = distributor to=20 know when to supply fuel, using the throttle position, engine temp and = maf=20 sensor to determine how much fuel to inject. am i out of my mind or is = this a=20 (with some work) doable project.
 
enjoy this forum, even if i need a = ladder for some=20 of the discussions, as they are over top of my head.
 
larry c.
- ------=_NextPart_000_0011_01BF4357.F98AC460-- ------------------------------ Date: Fri, 10 Dec 1999 22:21:55 -0500 From: "Bruce Plecan" Subject: Re: how does tbi work This is a multi-part message in MIME format. - ------=_NextPart_000_0028_01BF435C.F74045E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I presently own a 79 fiat spider that I would like to convert to tbi = (from an 85 4 cylinder chevy cavalier). i have a 1.8 liter engine in the = fiat, the chevy is a 2 liter engine. does this year tbi operate in open = and closed loop mode. Yes. what sensors would i have to include, which could i ignore. Use all of them. Start with learning the basics, and build on that. = Don't try reinventing the wheel with your first go around. i understand that the chevy injector works mainly off the distributor = to know when to supply fuel, using the throttle position, engine temp = and maf sensor to determine how much fuel to inject. am i out of my mind = or is this a (with some work) doable project. Given time, energy, money, and information, about anything is = possible. Ya need to do your homework, and the level that you do that will = predict your success at the conversion. Homework here is reading the = gmecm AND diy_efi archives for all the TBI postings. enjoy this forum, even if i need a ladder for some of the discussions, = as they are over top of my head. It will get much worse. I still get to where I can't even word the = questions Grumpy larry c. - ------=_NextPart_000_0028_01BF435C.F74045E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I presently own a 79 fiat spider that = I would=20 like to convert to tbi (from an 85 4 cylinder chevy cavalier). i have = a 1.8=20 liter engine in the fiat, the chevy is a 2 liter engine. does this = year tbi=20 operate in open and closed loop mode.
 
Yes.
 
 what sensors would i have to = include, which=20 could i ignore.
 
Use all of them.  Start with = learning the=20 basics, and build on that.  Don't try reinventing the wheel with = your=20 first go around.
 
 i understand that the chevy = injector works=20 mainly off the distributor to know when to supply fuel, using the = throttle=20 position, engine temp and maf sensor to determine how much fuel to = inject. am=20 i out of my mind or is this a (with some work) doable = project.
 
Given time, energy, money, and information, about = anything=20 is possible.
Ya need to do your homework, and the level that = you do that=20 will predict your success at the conversion.  Homework here is = reading=20 the gmecm AND diy_efi archives for all the TBI postings.
 
enjoy this forum, even if i need a = ladder for=20 some of the discussions, as they are over top of my head.
 
It will get much worse.  I still get to where = I can't=20 even word the questions
Grumpy
 
larry = c.
- ------=_NextPart_000_0028_01BF435C.F74045E0-- ------------------------------ End of DIY_EFI Digest V4 #689 ***************************** 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".