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Old 08-30-2004, 11:10 AM
Jack21 Jack21 is offline
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Think you're confusing apples and oranges. Solid rollers vs hydraulic rollers.

With the exception of some Chevy solid rollers which are made for street use (CompCams), most solid rollers are race only items.

Hydraulic rollers are another story. Most cars today come from the factory with hydraulic roller cams! The Mustang Five-Oh has had 'em since '85. These motors power everything from Stangs to trucks for well over 100,000 miles on the original roller lifters. My CompCams retrofit roller came with stock Ford hydraulic roller lifters. The factory uses them because they generate less friction. Less friction = better fuel economy.

What gives out on high lift profiles are the springs, not the lifters, because they get hot. To improve the springs longevity, have them polymer coated with an oil retentive coating to impove oil cooling. Airborne Coatings did mine.

Something else CompCams advised was to return the roller rocker arms every 50 thou or so to have the trunion bearings and roller tips replaced.

When you replace your solid rollers with hydraulic rollers, check the lifter bore clearance. From the photos, it looks like there's some scuffing on the lifter bodies (both of them) indicating the lifters rocking side to side in the lifter bore.

Last edited by Jack21; 09-10-2004 at 08:51 PM..
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