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How much boost will a 7" crank pulley and a 3.4" pulley make on a D1 sc procharger

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Old 03-15-2013, 07:24 PM
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[QUOTE=zackyv55146;17231712][QUOTE=Bob@BruteSpeed;17231694]
Originally Posted by zackyv55146
Alright should I look for a 7.65 for the 6 rib to? Or a different size
If I remember the pulley has an eight inch diameter. Bob
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Old 03-16-2013, 03:17 PM
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hey i was hyst curious would i be able to run this and keep the rest of my 6 rib set up?

http://www.innovatorswest.com/833-LS...er.html#tabs-3
Old 05-25-2013, 04:01 AM
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01 SS M6 merkel Racing forged built 346, D1-sc Aster tentioner system, 215/230 .600 thunder racing blower cam, bsolute Speed ported heads , 740/670 RWHP/TQ @ 15 psi 3.7 and 7.65 with a 3.4 i think i would make 18-20 psi, No belt slip!
Old 05-25-2013, 05:54 AM
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Originally Posted by LS2Ttype
01 SS M6 merkel Racing forged built 346, D1-sc Aster tentioner system, 215/230 .600 thunder racing blower cam, bsolute Speed ported heads , 740/670 RWHP/TQ @ 15 psi 3.7 and 7.65 with a 3.4 i think i would make 18-20 psi, No belt slip!
Those are some serious numbers you're making... congrats.

I have currently a 4.00" pulley on my head unit, but I have a 3.40" pulley and belt just waiting to go on. I need to do some fuel upgrades as well as switch over to a 3-bar setup if I make the switch though as I'm already at 200kpa at 6900rpm.
Old 05-26-2013, 01:23 AM
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i think they make a 2.5 bay that will plug right into your intake, 2.5m bar is good for 21psi , so than you dont have to use a big 3, bar, I was thinking about the 3.4 also and turning up the boost, not sure how much timming i can run at 18 psi and if my stock ported LS1 heads will hold and not lift, i am using APR head studs and GM MLS gaskets.



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