Pac 1248 spring , 1.80 int rocker, 1.75 exh rocker. Cam is .500imt .490exh . Anyone got any thoughts?
We had two sets break springs after 30 runs. Ours were set up too far from coil bind and cavitated. We went to a bigger spring and shimmed it up. Now we've gone to a more reasonable cam we probably don't need the crazy spring pressures.
I recently found a crack on the exhaust rocker boss on #1. Leaking water.
It's easy to go too far fixing it too.
No matter how many times you paint over a shadow it's still there.
Was running the same spring. Had issues with unstable valve train and breaking. Changed to psi with exact same setup and problems gone...
Owner/Driver of the Livin' The Dream Racing dragster
"Speed kills but it's better than going slow!"
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