Originally Posted by beckster
I was wondering what the best supercharger pully size would be for my bonneville soon i will have NGK tr6 and tr55'*/ if possible steps on removing and replacing the original one thanks.
TR6 is two heatranges colder than stock. Why are you doing that BEFORE the pulley? They'll foul out on you.
IF you have a scantool AND fuel pressure gauge, go with a 2.2" pulley and be prepared to buy a 2.3" or have your exhaust manifolds ported if you get KR.
If you don't own BOTH a scantool AND a fuel pressure gauge, go with a 2.3", and get a running scan somewhere anyway.
The reasons? You have to know if you get KR. I can destroy your engine. It'* not just a plug/play thing. In addition, most cars of your vintage are showing signs of low fuel pressure which is not apparent with a stock pulley, but VERY apparent after adding a smaller pulley/more flow. Running lean at the top end under boost causes BOOM.
Moving to Forced Induction