Valve Spring installed height - 460 Ford Forum
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Old 03-28-2012, 03:03 PM
GoWest GoWest is offline
Join Date: Jul 2006
Location: Florida
Posts: 168
GoWest Driving a Ford
Default Valve Spring installed height

Wondering what seat pressure you would use on an application such as the following. The spring is supposed to be 230lb @ 2.00" and 580lb at 1.300". RPM ins't too high so wondering if it may be safe to drop down a bit. Street/Strip with F1 Procharger.

Cam is a Comp solid roller with #4303 intake lobe and #4022 exhaust.

Intake: 290*, 257* @.050, 176* @.200, .429 lobe lift.

Exhaust: 300*, 264* @ .050, 181* @ .200, .420 lobe lift.

Intake valve: 148g

Exhaust valve: 121g

Steel Keepers

Rocker: 1.73 I/E

Spring: Comp #26089

Engine should peak @ 6000 so max rpm in the neighborhood of 6500-6800.

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