Ask Away! with Jeff Smith: Upgrading Valve Springs for Better High-RPM Performance
I’ve got a 454 H.O. crate engine and we installed a small ProCharger centrifugal on the engine to bump the power. I thought this would work well with the engine’s 8.75:1 compression ratio. I then took the combination to the chassis dyno but ran into all kinds of problems. The engine just lays down at
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