Comp 987 dual valve springs and boost??
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Joined: Sep 2000
Posts: 232
From: Bristol, Tn
Comp 987 dual valve springs and boost??
Just needing to see what you guys think about these springs with a mild street/strip cam, 1.6RR, and about 15PSI on a 383 LT1. Should I upgrade to a stiffer spring or will these be OK. I am just concerned with higher boost levels they might not be suffiecent. 
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Joined: Oct 2000
Posts: 219
I've had mine for 6 years with a CC305 with no probs. I don't rev nuch past 6200 but have missed shifts and gone to 7000 a few times. 10 psi out of a Vortech. mid 130's in the 1/4. I'll use them again when the time comes.
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racecarz28
General 1967-2002 F-Body Tech
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Mar 30, 2015 09:55 PM