So I'm back in the internal debate of which engine to use, the 4cyl that came in the car or a 3400 v6. I guess I'll try the old pro and con list.
2.5 4cyl 3400 v6
pro con pro con
1)already have lower performance | higher performance need to buy
And that's as far as I get, with either engine I will have to purchase a new ecm and re-wire the engine (less wiring with the four cyl then the 6 cyl) and buy a prom emulator and reprogram the ecm. I will need to buy a new and bigger fuel pump. On the four cyl I will need to custom build an intake manifold and fuel system, but only will need four injectors, with the 6 cyl I will need six injectors and custom fuel system. With the four cyl I will need to make a turbo header, with the 6 cyl I will need to do even more exhaust work. I have a T25 turbo for the four cyl that just needs a rebuild kit, I will need to buy a different turbo for the 6 cyl(so far I can't figure out which turbo). The four cyl will need new rods and pistons and hi-po cam, the 6 cyl can use the factory internals, hi-po stuff is even pricier than the four cyl stuff. With the 6 cyl I will need a new flywheel, and need to fabricate a front mount. The four cyl will be unique, very few four cyl have a turbo if any, they are out there, but very few. The 6 cyl is more common and has more support in the aftermarket, look up http://www.wot-tech.com/shop/ they do a lot of 6 cyl stuff.
The other thing I have been considering is the way I drive, or will drive. I think the four cyl will survive just fine with my driving, I'm not trying to build a race car (road race or drag). I know the four cyl can't be revved past 5000 if I expect it to live, so I want to design the turbo system to spool up early. My basic goal is to be able to merge into highway traffic easily. The Fiero already handles great, I just need a little power boost. I know the 6 cyl will be more reliable and faster.
So this didn't help me decide either.
