The 17% pulley will spin the supercharger faster and generate more heat than the 15%, it will however create more boost lower down, thogh when it gets in the upper rpm the intaake temps go up which kill hp (need to do some back to back tests on a 15 17 19 when we get 5mins)
People here and more so in the USA have done loads of miles on 15% 17% 19% without a problem.
When researching remember to see what blower is on the car because there is a difference in horsepower & psi between early and late.
We do fit any combo of parts GTT / Lohen and in whatever stage the customer wants, i.e pulley 1 month, exhaust manifold next month. All we care about is you go out with more horsepower than you arrived with.
We can dyno your car before and after the part has been fitted so you can see how much horsepower you've gained for your hard earned money.
We have had very good results on the dyno and on the track with the stock ecu.
Our order of parts would be 15% plus colder spark plugs, ex manifold, intercooler, camshaft
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