IBuiltMine-o1oo Posted October 10, 2005 Report Posted October 10, 2005 talking to a couple guys who know, the things i know of are heads (the compression difference is in the heads) injectors (22lb instead of 19) turbo (duh) Fuel pump radiator with intercooler someone said theres a NA 3.1 out there with the same heads as the Turbo, compression wise? Also will my roller valve train from my 3100 swap over to a set of 3.1 heads? what i need to know is what it takes to convert my 3100 to a turbo. i have the wiring and computer taken care of already, and i want a slightly larger turbo then the TGP came with. Thanks!
chadz34 Posted October 10, 2005 Report Posted October 10, 2005 There's a sticky in the Turbo Grand Prix section dude.
dbtk2 Posted October 10, 2005 Report Posted October 10, 2005 Way too much shit is different. HOWEVER, the heads have 2 more cc's or something IIRC, but the compression is only .1 lower on the turbo engines, 8.8:1 vs. 8.9:1 really doesn't make much difference at all. I put 3100 heads on my turbo engine and the added .1 compression didn't make any difference at all. The radiator, injectors, fuel pump, chip, transmission, exhaust manifolds, crossover, downpipe, plenum (not that this matter if you want to make one because all it has is a hole in the side for the manifold temp sensor and it is labled "3.1 intercooled turbo"), map sensor, oil pan. You'll also need to get the boost controller. Basically, its a lot easier to just find a turbo parts car. I'm sure there are parts I left out too. If you put 3.1 heads on your 3100 it will fall on its face horribly, not to mention you'll also need the complete topend from a gen II 3.1 to make this work (lower intake, plenum, fuel rail, throttle body, etc...). Leave your 3X00 heads on there....you'll have a lot more power. My TSTE runs EXCELLENT with 3X00 heads...of course mine are slightly modified, among a few other things. Shawn
Guest TurboSedan Posted October 10, 2005 Report Posted October 10, 2005 Sean i would most definately keep the 3100 heads you already have before going to TGP heads. the 3100 really is better all around. you can use the TGP exhaust manifolds and crossover pipe on the 3100, but prepare to do some grinding to match the exhaust ports up. some people have said that can't be done, but Jud (sleeperred90tgp) has done that and he has the fastest TGP out there. you may want to look into what he has done with his car. as far as engine management...go with a 3.1 MPFI engine harness and ECM. i should have the stuff to burn you a TGP chip shortly. obviously you'd need a GM 2-bar MAP sensor with that. that gets the electronics out of the way....almost. you'll need to get rid of the 4T60-E or else find another way to control the engine such as AFPR, FMU (aka RRR), and something like the FTC1 split second like timg uses for timing. and a boost controller....my manual boost controller only cost $25 from M&M Racing. i almost hate to respond here because turbocharging a 3x00 or hybrid 3.1/3x00 is something i have only read about. i got lucky with my Cutlass just finding the Turbo STE out at Nanneman's. my engine is sort of a LH0/LG5 hybrid
IBuiltMine-o1oo Posted October 10, 2005 Author Report Posted October 10, 2005 cool, i thought the 3100's actually had some compression.i had no idea it was still below 9! im a firm believer in MAF, im going to keep my OBD-II. There are people out there with 4.6 mutangs and twin turbos, so its not that hard to do. Im just wondering about the mechanics of it all, the compression ratio, the valve train, the exhaust manifolds, and especially the turbo manifold. how will i bolt on a t4 turbo to a TGP manifold? why do i need tgp manifolds if you had to have custom braided pieces stuck to the ends? Wouldnt my stockset work? Thanks!
IBuiltMine-o1oo Posted October 10, 2005 Author Report Posted October 10, 2005 ok, the main page says my 3100 has 9.5:1 compression. thats way too much for a good size turbo. the turbo GPs have like 8.8 to 1?? id have to lower it a full point. i can do this with a cooper headgasket, and longer aftermarket pushrods. going like 5 thousanths wouldt screw up the intake manifold suface would it?
jeremy Posted October 10, 2005 Report Posted October 10, 2005 http://www.w-body.com/forum/viewtopic.php?t=12387 if you have specific questions about turboing a 3100, please start a new topic about it with an appropriate thread title, that way it will easier to find for future users that use the search engine
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