Will my computer reject boost?

[ikessky]

umm i have a 95 and as far as i know i cant get a differant chip for it.
so now what but if i can use that chip i'll take it! email me astonsmith1@hotmail.co

They are saying you shouldn't even use your stock computer! You need a 727/730 computer with a TGP chip and then get that custom burned for your setup.

[Compufreek]

At that point wouldn't it be cheaper and easier to run a aftermarket ECM?

[SappySE107]

only if you got a crazy deal on one. Wiring and ECM should be less than 100 bucks if you know how to shop for one.

[Compufreek]

Now are these completely seperate from the chasis computer? I was thinking about doing this setup but didn't want to lose the SFI. I know you mentioned black boxes, what the hell are they? I also have heard that Fast chip is a pain to deal with, does anyone know other programmers that can do the 2 bar map on a 3100 SFI ECM? I have seen it done to a 3.4 DOHC, are the computers similar? I have talked to a dyno shop in the area and they said the would be able to make a custom code up for my but would have to send it out to get it burned (this was also when I was looking at a Zex setup so I don't know if they can handle the turbo setup)

[3100rettaracer]

so ok i need like a 94 3100 computer or somthin? cuz i can handel that
but yeah i want the chip than
oknow here comes the hard part......

yeah i KNOW i need the harness too...

[Compufreek]

Listen man you gotta do some research. The computer they are telling you to get is outta a bunch of different cars from 88-93 some of which are turbo cars that will put you ahead of the game.

[SappySE107]

You need an 88-93 computer. 1227727 or 1227730. This is probably the 5th time its been said so for the love of god please understand it this time.

The 2 bar setup with the DOHC was done by editting the assembly code in both the data tables and the executable areas. Brian did it and explained it to me as it went over my head:P The best way to keep SFI and go 2 bar is to forget 2 bar and go MAF. This would require the 94-95 DOHC code...and I guess someone did this with a fiero. I wouldn't worry about SFI since it is only used at low RPM (idle) for emissions. Above a set RPM, I want to say 3000 but im not sure, it will return ot batch fire anyway.

Chassis computer? Thats the BCM used in newer cars than I mess with. Also, if you have a 4T60-E or other E computer, you would want to piggyback the stock ECM so it has the same inputs it always had, but only use the outputs to the transmission. I dunno if it will throw a code for anything, but it surely doesn't need to be hooked up to the gauge light

[brian89gp]

As long as it is not OBD2 then there is no worry about a chassis computer. For the most part aside from Caddilac, GM tries to keep their computer systems seperate so that they don't even know about each other. OBD2 they started using serial busses between the computers.

I wonder, the 3100 is pretty similar to the 94+ DOHC sensor wise. That would definately be interesting.

For the SEFI ECM's, I think that it is always in SFI unless during cranking or PE. I can find only a lower RPM limit, not an upper. If I had a car around here to mess with I could find out for sure, but I don't.

[bszopi]

I have a book which talks about it... I'll have to look it up.

[Maetrix66]

3100 with tgp comp.

I agree with Mechanic, the tgp computer and program is the single best way to turbocharge a 3100. With the only drawback is that you lose your SFI, but that is small potatoes. He's been holding my hand off and on with my 84 fiero SE, which I have the intercooler, engine, and computer/wiring harness already installed in. I have done alot of my own research on this, since I was worried about putting all of this stuff in and finding out that I could only get like 7 psi of boost and having it not work properly. But trust me man, when you get bored of the stock code, let Mechanic tell you about how far you can turn the boost up with the proper adjustments! Can you say frickin sweet? There is also products made by craig moates that can allow you to use up to six different engine programs on one chip, and change between them at teh turn of a dial, like, say, 14 psi for drag, stock for street, economy for trips, just make sure you can get the right fuel injectors. Mechanic, I'll send you some pictures of my install as soon as I get the snow knocked off from the decklid. I'm just waiting on a turbo that I can afford, and then it's on the home stretch.

[Compufreek]

Yeah I was worried because I have a 95 GP that from what I have read has an OBD 1.5. I also have read that SFI was used in alot of performance build, in general, that is why I wanted to keep it. How would you go to a MAF setup and how would that help the situation?

[3100rettaracer]

oh jesus....you guys are gonna shoot me.....
is it a v6 computer, cuz if i goto a yard and give em the #S for that comp they are gonna look at me like "uhhhhhhhhhh...."

[bszopi]

It was actually used in many different vehicles... 4-cyl, V6s, V8s...

[3100rettaracer]

like tell me a couple....

[brian89gp]

727:
1990-92 2.5 L4 TBI ?R? LR8 (?W? body)
1988-89 2.8 V6 PFI ?W? LB6 (?W? body)
1989-93 3.1 V6 PFI ?T? LH0 (?W? body)
1989-90 3.1 V6 PFI turbo ?V? LG5
1990-91 5.7 V8 TPI ?8? L98 (?Y? body)

730:
1987 2.0 L4 TBI ?1? LL8
1988 2.0 L4 TBI ?1? LL8 (early)
1987-89 2.8 V6 PFI ?W? LB6 (exc. ?W? body)
1988-94 3.1 V6 PFI ?T? LH0 (exc. ?W? body)
1990-92 5.0 V8 TPI ?F? LB9
1990-92 5.7 V8 TPI ?8? L98 (?F? body)

And since you want the wiring harness as well get one off of a 2.8 or 3.1 preferably out of whatever body line your car is.