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Always interesting to hear of 3.2 owners searching for more power. I had mine rebuilt with similar aims a few years ago. My recipe was euro Ps&Cs, supercup cams and SSIs plus the usual rod bolts, race valve springs, Ti retainers etc and a custom SW chip. I saw 260fwhp, but never saw more than about 220lbft of tq. Fast forward a few years and I decided to put a 964 plastic intake with working resonance flap, hot film maf and 1 5/8 headers on. Once that was live mapped on the dyno I am at 283fwhp and 250lbft. Getting this to work was neither inexpensive nor trivial, but it is now a strong engine that pulls much harder in the mid to upper ranges. I am also running an aluminium pressure plate and 930S spring centred clutch which together with the cams makes this engine much more akin to the early, revvy engines in character. Ignoring the dyno numbers (notoriously unreliable), the change in character and the seat of the pants difference certainly do make it all worthwhile.
What I have learned, is that changing just one thing (say exhaust) makes little difference. To make a real difference in hp/tq, you kind of have to go through the whole system and change everything to step up to the next level.
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