good luck with that "300 HP" in our front wheel drive, weak tranny celicas.
i look at it like this..you hit 300 HP and yes, the celica being 2800 something pounds(?), it will be fast as hell. BUT, our trannys can't handle that type of power, let alone you will have no traction AT ALL. you would have to decrease the boost to less than 250 HP..as our trannys bust at around 250 HP. but even then, you would still have traction problems and your car would be useless if all you're doing is spinning your front tires.
the 3s-gte however requires an AWD transmission format, and it is built to handle that kind of power. when you think about it, the amount of money for a good turbo kit, LSD, reinforced internals, 2.0L stroker kit(like someone said), and a busted tranny along with the best tires you can buy is a shitload of money..i would estimate it being about 8000+. with a bit more(considering you ahve the money), you could drop a 3s-gte in your car and take care of any traction problems and transmission problems, like owning all the cars on the road.
just my .02
Sure, but you know what? you say the celica tranny is weak... so is the motor when you get down to it, everythings cast aluminum, cylinder walls are thin, rods, mains and bearings can't handle much over 200 HP, same thing with balves & springs. it stands to reason if you're dumping enough money into your 2zz to make an even 300 HP, you're gonna give the tranny some work too. and trannys arent as fragile as you think, most of the internals consist of hardcore steel gears, it will take waay more then the celica's motor can dish out to wreck it, I think you'd need to think about upgrading your axles/cv joints before you'd need to worry about the tranny having problems.
The Hotchkis celica is running aftermarket clutch, flywheel and LSD in it's tranny, and it's also using Red Line tranny fluid too. Guess what? John's celica is pushing 300 HP, on a nearly stock transmission, and it's worked fine for him... It stands to reason if his celica can do it on a stock tranny with a ligher flywheel, better clutch and LSD, then I'm more inclined to believe John Hotchkis then you.
My 2 cents.
Oh yea, one more thing, our celicas are already nose heavy as-is, they have a tendency to understeer badly because of this, if you put a heavy mill like a 3s-gte in the front, you're gonna get more HP, but the car will be heavier, and you'll compound the celica's shortcomings. I'td be a fun drag car, but it would handle like ass.