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Hello, Edreamsz.
My Boxster S is stock, but my Mazda Miata is supercharged at about 6 psi. I'm sure you've done some research and are aware of the issues involved in boosting a motor that was not designed for it. The two things I suggest you take special care about are engine cooling and ignition timing. The denser fuel/air mixture will require some spark advance, which will follow a curve based on RPMs. I've found that a programmable, and real-time adjustable, digital ignition control box is useful.
Cooling of the cylinder heads and the exhaust stream is trickier. The Boxster's exhaust path is short. You could actually melt the catalytic converter's guts if you're not careful. Or, just use a non-cat system. A high-flow water pump should be enough to keep the heads cool, but maybe not. Do the thermal calcs to see if the radiators will be able to shed enough heat.
Good luck with the project. It will be fast and fun. Do it right and it will last longer.
Cheers,
Dave
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Earth Tour
Helios 1
Threaded Mode
