Me taking the **** from boy racers?:D
Boosting any high compression petrol engine is just dumb. The last guy I know who tried it welded a couple of 4AGE's into solid lumps of aluminium.:imwithstupid:
5psi can make a maximum of 30% difference, that's with perfect intercooling of course.
15psi with perfect intercooling can double your existing power.

