[gtofreek]

Originally Posted by PONTIAC DUDE

Yep, Damn those 'HEAVY' Hydraulic roller lifters won't rpm. Can't make power. What's wrong with those damn things. People whining about the performance of those hyd roller cams.

10.16@132 thru the traps at 6800 rpm. shifting at 6500. 3450 lbs, stock suspension, DR's with a Powerglide. LOL.

You know, it's funny P-Dude, how everyone is so worried about lifter weight. When we were at PRI showing off our flat roller lifter, just about everyone made a comment about how heavy they were. Our lifter weighed something like 113 grams. A standard Johnson flat tappet weighed like 88 grams or so, empty! When you fill it with oil, it weighs about 110 grams. Our lifter has very little room for oil weight. It really cracked me up how people would say, "it sure is heavy" . Yeah, so! What difference does it really make anyway? Very little. Weight on the cam side of the program doesn't matter anywhere near as much as weight on the valve side of things. Then there's the fact that roller lifters are so much heavier than our flat roller. Noone ever bitch's about how a solid roller lifter is so heavy and my engine won't rpm with them. How many people are spinning over 10,000 rpm with those heavy ass roller lifters? Must be made of some cosmic, lightweight material, right? Bob Fox, inventer of the spintron, invented it to prove that weight on the cam side didn't really matter. He was dogged about how much his pushrods[Trend Performance] weighed so he made the spintron and took a lightweight pushrod and ran it on the spintron and got some readings. He then took a SB Chevy piston pin[145 grams] and slipped it over the pushrod and welded it in place then ran the test over again and found that the difference was not really measurable. I mean, think about it, when the engine is all assembled, there is hundreds of pounds of weight[springs pressure] on the lifter, essentially adding hundreds of pounds of weight to that lifter! What is adding a few grams of lifter weight really going to do? DIDLY SQUAT, that's what!

We did however redesign our lifter to get it down to the 79 gram range just to make the tire kickers happy!