96 3100 Grand Prix Turbo

[94GPGTP]

Ok well this has been running through my head for the last 2 weeks... The more and more i think the more and more i want to start the project... Well my friend had a complete TGP motor until 3-8-08 when he took the heads off.. But anyway I am wanting to put the TGP Turbo Setup on my 96 Grand Prix 3100.. The parts that i already have so far are: Turbo (needs a rebuild),X-Over, Downpipe, Front and Rear Exhaust Mani's, Possibly the Map sensor, Coolant Supply line, Possibly the Oil Filter adapter piece, and little odds and ends.. I will just run a FMIC .. Now I believe what i would do is put on the exhaust manifolds, the cross over, the turbo, and the downpipe.. Then i have to worry about supply and return for oil and water.. Where will i get them from??

Do i run the MAP sensor or will the MAF take care of that? Also I would need somebody to Tune the Computer Correct?? If so who can tune it for me?? Also will the engine be able to take the turbo?? Will it need like a lower compression or forged pistons or crank?? Injector size? Will i need bigger injectors? Reading up the 3100 is a stronger engine and a better platform than the 3.1 orginally?

The car is OBD2 with 4T60-E and the 3100.. The TRANS AND ENGINE have a good 3,000 miles on it now after a complete Overhaul/Rebuild.. The I have most parts to do the swap..

I have a spare 3100 and 4 4t60-e's to do the mock up on.. See how the turbo will bolt up to the 3100 and look into making the trans bracket..

So any Info or help or supply any parts would be GREATLY appreciated..

[IsaacHayes]

Those exhaust ports will be tiny on the manifolds. You can weld up the 3100 manifolds instead too. Or make your own. The turbo is small for the 3100 though. If someone has a DHP they could do a tune for you and you run larger injectors..

[94GPGTP]

Those exhaust ports will be tiny on the manifolds. You can weld up the 3100 manifolds instead too. Or make your own. The turbo is small for the 3100 though. If someone has a DHP they could do a tune for you and you run larger injectors..

I might be confused.. The way i am reading it is that the exhaust ports on the 3100 are smaller than the 3.1 exhaust ports? What do you mean weld up the 3100 manifolds?? Custom make a crossover for the 3100 manifolds?

[1meanz]

he means weld up where the down pipe is and make a coustom crossover.. the 3.1 exhaust mani ports will be extremly small on the 3100.. thats what he ment

[94GPGTP]

he means weld up where the down pipe is and make a coustom crossover.. the 3.1 exhaust mani ports will be extremly small on the 3100.. thats what he ment

Gotcha.. Now it makes sense... I guess ill call that a brain fart.. HEHE

[Superdave]

they aren't extremely small.. there is like 1/16" of overlap at the bottom corners of the D shape.

I ran gen2 manifolds on a gen3 engine with 0 problems several years ago.

[94GPGTP]

they aren't extremely small.. there is like 1/16" of overlap at the bottom corners of the D shape.

I ran gen2 manifolds on a gen3 engine with 0 problems several years ago.

If anything when i mock it up i will just port the Gen II manifolds..

[IsaacHayes]

The 3500 ports are huge compared to the gen2 ones though. I wonder which is ideal for turbo? Large or smaller ports?

[Superdave]

he's using 3100 heads.. not 3500

[IsaacHayes]

Yes but I was refering if you used the log 3500 manifolds as a base to create the turbo manifolds. Or the 2005? 3400 logs (same thing).

[94GPGTP]

Ok well im going to move this project closer to getting started.. I need some more info on boosting a OBD2 3100.. I know the TGP had a 2 BAR MAP my car has no MAP i have a MAF.. so how does that work? Are the 3100 Injectors smaller same size or bigger than the TGP injectors cus if smaller i will use them instead of the 3100 ones.. Also O2 sensors what do i run for that?

Tuning wise how can i tune?? I was talking to Mike from Milzymotorsports and he told me to use a 97 3100 monte computer b/c mine is 256k and the 97 is 512k.. It's easier to tune?? Can the Rear O2 be removed in the tune?

I need help with the electrical part of the build other than that i should have everything else in my hands..

So Guys PLEASE help me..

[TurboGTU]

TGP logs will fit , might wanto grind on the ports to smoth out the transition from D port to the TGP logs. The turbo is on the small side. You should be alble to use a GT28*** type turbo. Or even a 300hp + T3 turbo or hybrid t3/t4.

I've never realy messed with the OBD2 stuff. So DHP might help you there. I know you'll need something bigger than 22lbs injectors depending on how much HP you wanto out of the combo. Your injectors are smaller than 22lbs. TGP locates the O2 on the turbine housing. BUt you can move it on the down pipe, well both.

I see your local. Im by the Alamo Dome.

[94GPGTP]

Yea looks like i will be needing to do some porting on the exhaust.. But im Really not sure about the MAP and MAF.. I might as well get a upgraded turbo b/c the TGP turo i have is shot and needs a rebuild.. Where is there a good place to get a t3/t4? Im not looking to get too much power as its going to be mated to the 4t60-e but it is fresh with 4k on a complete overhaul..

Turbo GTU Im 281/Hildebrand.. Thats where my car is at.. Maybe we can meet up and chat. I wanna see your TGP too.. Im orginally from chicago and came down here for work but will be going back up to chicago in october to start my turbo build..

[IsaacHayes]

Use a 1997 Venture Van ECM. The 512k gives you more tables open so more options for tweaking things. You DO have a MAP and a MAF. You will just tune by the MAF values, as long as you don't max out the MAF (then you need like an LS1 MAF).

You will need BIGGER injectors than what your motor came with. So it's a 3100, so it will need bigger with boost. You don't want to put SMALLER injectors if you are going to add boost. If the TGP motor had smaller injectors, that's just because it flows less and thus makes less power than a turbo 3100 will. Anytime you add more air, you will need to add more fuel with tuning, which can max out stock injectors, so you usually go to bigger ones once you've reached that point with either boost or a larger motor with a hot cam/headers etc.

T3/T4 is going to be a good turbo. The TGP turbo is undersized for the motor it came on, and WAY small for a 3100.

Its probably possible to put on a 2 bar MAP but then you might not be able to scale the values correctly in DHP/HPTs. Usually OBDII people just tune off the MAF.

[94GPGTP]

I dont have a MAP just a MAF... I was wondering if i would use the MAP but i will not be.. What size injectors should i be looking for and what vehicle will they be on? Will the t3/t4 use the x-over and downpipe from the TGP.. Basically a bolt on bigger turbo? Or no? Im not looking to make it a BIG project something quick that will make me happy for awhile.. Where should i get a t3/t4 turbo from?

Use a 1997 Venture Van ECM. The 512k gives you more tables open so more options for tweaking things. You DO have a MAP and a MAF. You will just tune by the MAF values, as long as you don't max out the MAF (then you need like an LS1 MAF).

You will need BIGGER injectors than what your motor came with. So it's a 3100, so it will need bigger with boost. You don't want to put SMALLER injectors if you are going to add boost. If the TGP motor had smaller injectors, that's just because it flows less and thus makes less power than a turbo 3100 will. Anytime you add more air, you will need to add more fuel with tuning, which can max out stock injectors, so you usually go to bigger ones once you've reached that point with either boost or a larger motor with a hot cam/headers etc.

T3/T4 is going to be a good turbo. The TGP turbo is undersized for the motor it came on, and WAY small for a 3100.

Its probably possible to put on a 2 bar MAP but then you might not be able to scale the values correctly in DHP/HPTs. Usually OBDII people just tune off the MAF.