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Discussion Starter · #1 ·
got my s-trim today! and damn if im measuring it right it looks like alot of boost

my crank pulley is 7 inches and all 1 piece, and blower pulley is 2.75 thats measuring from the diameter of the entire pulley not just the ribs

how much boost is a 7 inch crank and a 2.75 blower pulley with a powerpipe going to make thru my car(look at my signature)


heres the vortech impeller speed calculator
Support | Vortech Superchargers
 

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Discussion Starter · #5 ·
damn looks like i need a good tune


i hope 12# will be ok on my hyper pistons?
 

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Discussion Starter · #7 ·
it dosent say i looked everywhere
 

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Discussion Starter · #9 ·
ok so the outer diameter is 2.8 inches or in metric 7 centimeters

so minus 1/4 of it is 6.6 centimeters or 2.6 inches

so i have a 2.6 pulley?
 

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Discussion Starter · #11 ·
what pulley do you think will make 10.5-11psi thru gt40p heads cobra intake full 2.5 exhaust and a trickflow cam if that matters thru my old v1 s-trim with a POWERPIPE shifting at 5800rpm
 
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