Twin Turbo 3.4 DOHC? Am I insane?

[Joseph Upson]

My 3900 Fiero started out twin turbocharged and now has a single T67 that performs better and is packaged better. If you were to stroke the 3.4L so that you'd have more bottom end torque it might almost be worth it, but considering the benefits of twin turbos (to better accomodate larger V motors for example) it's overkill and over complicated. Except for uniqueness, I strongly advise against a twin setup in an application that doesn't require it. Consider using the extra space for an outstanding intercooling system like an liquid to air intercooler inline with an air to air, you'll get more from that than you will from an extra turbo especially if you achieve intake air temps within 20 deg of ambient or better considering I've logged intake air temps as high as 300 deg at ~15 psi. You can expect ~1% increase in power per 10 deg drop in air temps.

I still have a 3.43" stroked and radiused steel crankshaft to get rid of.

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