upping boost

[cjg454ss]

i have a 94 vette, catback and vortech, im running 6 lbs, what pulley would i need to go to 8 lbs. also how much more of a strain would it be. i run alky injection 50./50. also how much hp will it add u think add.

[Mo_Bandy]

If you talk to Greg at Blowerworks greg@blowerworks.net he can modify your Vortech intake which will help.... I was running a 3.125 with a 7 inch crank pulley with a 7 rib belt and was "bumping 10 pounds...

I installed his 8 rib with better tensioning and was hitting 12 at 5500... with a ATI balancer that was 7.5 inches...

Hope this helps
MO

[cjg454ss]

Originally Posted by Mo_Bandy

If you talk to Greg at Blowerworks greg@blowerworks.net he can modify your Vortech intake which will help.... I was running a 3.125 with a 7 inch crank pulley with a 7 rib belt and was "bumping 10 pounds...

I installed his 8 rib with better tensioning and was hitting 12 at 5500... with a ATI balancer that was 7.5 inches...

Hope this helps
MO

yeah i know about the intake, i might just redo the whole intake. it seems very restrictive. or i just may have the baffle welded in. whats the stock pulley sizes?

[Mo_Bandy]

The stock pulley sizes are 7 inches on the crank and 3.125 on the S/C, which are supposed to give from 6-8 pounds. Generally it depends on how much belt slip you get... If you are running 6 ribs then it may be more difficult to get too much more.. I was running an older 7 rib setup... which did help some, but I still sufered belt slip on the top end.


Mo