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Which pulley?

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Old 05-19-2017, 09:21 PM   #1
Tusc
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Default Which pulley?

Which pulley will put 10psi on my combo?

[email protected] P1sc kit, LS7 blade maf, LS7 tb, fast 92, stock 99 LS1 heads/cam and shortblock.

It goes to be tuned in a week. Time enough to order a different pulley if needed. 3.85" currently installed.
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Old 05-19-2017, 10:48 PM   #2
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I'm right at 10 psi with a 3.7. I'm running a p1 with a ECS big blower cam.
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Old 05-19-2017, 10:49 PM   #3
Ls2gtoowner
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Not really a set answer every car/setup is different.
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Old 05-20-2017, 03:19 PM   #4
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Quote:
Originally Posted by Ls2gtoowner View Post
Not really a set answer every car/setup is different.
Agreed. Use of cams and other components will affect the boost.

For reference, I ran a 3.6 pulley for 10psi and am currently using the 3.4 pulley at 12psi. Car is an 01Z with a stock cube forged 346, oem heads, mild blower cam, and longtubes.

Last edited by Quickshift_C5; 05-20-2017 at 03:20 PM.
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Old 05-21-2017, 06:48 AM   #5
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Quote:
Originally Posted by Quickshift_C5 View Post
Agreed. Use of cams and other components will affect the boost.

For reference, I ran a 3.6 pulley for 10psi and am currently using the 3.4 pulley at 12psi. Car is an 01Z with a stock cube forged 346, oem heads, mild blower cam, and longtubes.
Apples to oranges. His step up ratio is 4.10 on his P1. Your blower 3.60.

P1 is rated at 1200cfm
SI is rated at 1150cfm

Can't just compare pulley size on different applications.
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