Originally Posted by
GNs-r-slow
Where did this magic # come from? I run a Erson Hi-Flow II 544 solid lift cam with press in studs on some ported 69 Windsor heads bolted on a 289 for several years. Adjusted the rockers regularly and never pulled a stud. Hell I sheared the pin on the cam for the timing chain and bent every intake valve and still no pulled stud.
.544 lift and you're wondering why you bent every intake valve and had to adjust it all the time?
Tommy, I'm not trying to knock you at all. Heaven knows you probably know more than I do about this, but....I'm pretty sure Edelbrock knows what they're talking about. Even in their ad for the RPM cam, they say that you have to have screw in studs and guide plates. And that cam is only .496 and .520 lift IIRC. I LOVED that cam.....