293 HP MIATA VS. golf Vr6 turbo
#32
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It should do 300 whp at 10 psi and around 400 at 20. The engine should hold up to 30 psi easily.
#37
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The internals do fine well past 400 whp with just a head spacer to lower compression. The previous owner of the car installed one that is so thick I bet it dropped compression by 2 full points. Running just 10 psi from a full T4 turbo is usually pretty ******* quick. These cars only weigh 2700 lbs.