Performance Mods: What are my options?

[Joryn]

Hey all, been a while since i browsed here, but with spring finally having arrived my thoughts turn to my cars and their track performance once again.

Now since this is the first time i will have a chance to do anything to a 2.0L pontiac turbo i figured id poll the audience and see where the first and foremost mods are.

Now i should state first that i have worked on turbo cars (specifically shelby dodge turbos) so i know that more boost and a FMIC are big power gains, but I'm looking for stuff that is a little more specific to these cars. where are the bottle necks?? I know the turbo is small and im pretty sure i could grab a bigger garrett off of one of my turbo dodges, but not sure as to the difficulty rating on mounting one of those on here. thoughts??

so if anyones got some goodies for me let me know. also if anyone wants to know what ive done to the turbo dodges(perhaps there is crossover applications) just ask

thanks again

Joe

[Myetball]

Mantapart (http://www.mantapart.com/) is the place you want to go. They've got pretty much everything you could want for these cars. Click on "Engine Parts" then scroll down to the 1.6/1.8/2.0 OHC section. Also check out the chassis parts section.

Some shortcomings on these engines are the rather small intake/exhaust ports, restrictive exhaust system, lack of intercooler, and limited rev capability.

When I get going on my engine rebuild I'm going to port/polish the head, have a set of custom main cap bars made, install upgraded main studs and rod bolts, and drop in a set of upgraded pistons and rings. Also going to upgrade the valvtrain with stuff from Mantapart.

EDIT: Forgot to talk about the turbo. The stock T25 spools pretty quick, around 2500rpm, but does run out of gas a bit at high speed. Replacing the T25 with a hybrid shouldn't be much of a problem as long as you stick with a T2 exhaust flange. If you move up to a T3 exhaust side you'll obviously have to get a T3 flange welded on. I replaced my original turbo with a T25 from a FWD Nissan CA18DET. Had an interesting time getting all the oil and water connections to fit but it's in and works really well. I've been thinking about upgrading to a hybrid T2/T3 turbo to keep the quick spool and also get a little more boost at the top end. Let us know how it goes.

[Hybrid T2T3]

yea...ive heard the t2 called the t2small many times. the exshast housing is just to small, i kind of regret geting my t2/t3, dont get me wrong its good for the setup i have now but when i get my cylinder head i expect the turbo wont flow enough. let me know if you decide to throw on a crysler turbo, i have one sitting in my garage that i got from a 2.2L and im ready to use it. ive been thinking maybe i can swap out the housing and turbine on to my hybrid because the intake side of mine flows alot more than the crysler, or at least the ports in and out are bigger than the crysler

[Mr.Efficiency]

I'm from the J body comunity and everyone is putting T-3 turbos from an Omni GLH or a saab. The saab t3 is higher recomended cause its bigger and the omni has one of the smallest t-3's avalible, also the turbo manifold from the 2.0 turbo is quite restrictive, so hollowing it out helps to, and use all 2.5 inch piping for all your turbo pluming, and a 2.5 or 3 inch exhaust will help the turbo flow better, and gutting your cat also increases flow.

[Hybrid T2T3]

are those direct bolt ups or do i have to modify anything? also is the omni a 2.2L ? i have a turbo from a new yorker 2.2, i think its the same as a omni.

[Mr.Efficiency]

No the turbo is not a direct bolt on you have to modify the flange it bolts on to, with an adaptor plate or make a new flange that fits it and weld it to the end of your manifold, I'm making a complete custom manifold so it will be less restricive and accept the t3 easily. The omni is a 2.2 but the turbo from the omni motor will not bolt on to the stock turbo manifold so unless you modify'd your manifold to get that turbo to fit its a diffrent turbo.