Stiegemeier Porting Services, LLC

Pulley Recommendations with Stieg ported Blower

Stiegemeier's Ported Supercharger, Throttle body and Plenum pulley recommendation- A stock upper 2.93 with an added 4 #Lower will get you 14#s of Boost and an average of 400 rwhp with stock exhaust system.
A Stiegemeier Ported Supercharger. Throttle body and Plenum with Headers, Hi Flo Cats, X-pipe or H with straight thru mufflers can run a 6# Lower at 16#s of Boost and average 435 rwhp.
The Lightning suffer from a poor flowing cylinder head. The blower forces air in but relies on the exhaust port to exhale all spent gases.
The exhaust port flows at a valve lift of
.200 -- 84 cfm
.300-- 115 cfm
.400-- 131 cfm
.500-- 139 cfm
This explains the need for the enhanced exhaust system and why a 6# lower has little if no gains above a 4# coupled with a stock exhaust system.