[TCSGTO]

Originally Posted by tom s

I think the failed lifter was actually a Isky,been so long and have tried so many diff cams in that engine over the last 20 years.I know I had them rebuilt and are still in the engine.First can was a Isky solid roller,second was a 245-252 comp hyd roller,think the one in now is 236-244 hyd roller.Both comps were their high lift hyd roller lobes.Tom

You seemed to have very good service life out of yours. I'm just a little paranoid I guess after browsing the Chevelles forums & seeing all the failed lifters in BBCs with low miles. The Pontiacs seem to hold up much better.

[tom s]

they probably dont run enough spring pressure!Tom

[Steve C.]

Tom, do you ever feel we are beating a dead horse !


Valve springs are one of the most critical and most overlooked components in your engine. Proper selection of the valve spring begins with identifying the application and selecting all of the valve train components to achieve the engine builders’ goals.

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[TCSGTO]

Originally Posted by tom s

they probably dont run enough spring pressure!Tom

They generally run much more than we do. Probably has more to do with that funky porcupine geometry and bigger,heavier valves. SBCs get away with much less pressure.