Hey what kind of increase in boost are u guys geting with ur diff size pulley. is the size directly related to boost psi. or are there other things that should be factored in also? i know the lower u go the more fuel and cooling mods needed but other than than im new to superchargers> thx for the help

 

yes boost = directly related to size of pulley unless you have it ported then obviously less but in simple terms yes haha

 

Drop pulleys and its going to raise your boost levels.. Certain things like Porting the Blower and getting a Full 3" Exhaust with H/DP will lower levels as you're flowing More Air. 2.5 and 2.6" Pulleys as well as a 2.7" You're going to need some types of cooling mods, Large H/e, Dual Pass and/or Methanol Injection. Preferably you'll want all 3 when going to a 2.5" or a 2.6", but some guys have gotten by with Meth only and or Dual pass and H/E.

 

on the stock m62. i think for every .100 of an inch you drop from stock, its like a 1lb increase. i'm on a 2.8 and i'm seeing about 16.5psi

 

thanks guys i like the 2.8 ithink that is what i will go with im just going to try and do some more research and maybe grab a heat exchanger to be safe

 

I am on a 2.6 and seeing 18.5psi boost with 3" header/downpipe/2.5 catback exhaust.

 

when i went from 2.9 to 2.8 i hardley saw a difference. When i went from 2.8 to 2.7 it was crazy.

 

do u have any fuel or cooling mods to help

 

I see about 17psi on my 2.8, full 3" exhaust and 3" intake.

 

ya Large HE / Meth...works awesome...

 

at the track ive seen 19.2lbs on my interceptor this was in 3rd right before the traps. im on a 2.7 with full exhaust