I think that by now there isnt a completely stock s4 turboII around, atleast as far as intake and exhaust go... just make sure you got an intake and exhaust in your car before you start boosting, atleast put a good intake on it. I forgot it has 17k miles, before you start fuking around with it just drive the car a bit and sort of break it in. Cus an 87 with 17k miles is just a lil over 1k miles a YEAR... not good on a rotary engine... make sure as soon as you get it to treat it as it was a new car which means regular oil changes, and such. make sure you check vacuum hoses boost hoses and everything...also try running premix for the first month, to sorta clean everything out.... but back on the boosting subject, on the stock turbo you could pretty much make good power to run low 13's, any boost over that you'll actually loose hp... but for the cars sake drive it.
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