Thread: Which rocker arms?

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why are you running 250 on the seat of a 630 lift cam that you only want to turn 7000?

Originally Posted by jerry clayton

why are you running 250 on the seat of a 630 lift cam that you only want to turn 7000?

hi jerry,

why not? Is this overly excessive? Motor was built to hold together to 7500 but doesn't pull much beyond 6800 in it's present configuration (I think this is mainly limited by the 280cc oval heads)... what does it take to keep the roller lifters on the lobes at these revs? I was under the impression the springs were kinda tame compared to some of my similarly equipped counterparts...

thanks,

-Chris

With today's faster ramp rates on camshafts just about everyone is going to 225 to 250 for a seat pressure on a BBC at least for bracket type cars.