Quote:
Originally Posted by ItBites
Solid rollers are bad on the street. Low RPM (idle/cruise) does not get enough oil into/out of the needle roller in the wheel to cool the needles. The needles overheat and begin to spall material under load. The HIPPO lifters have an EDM passage that directs pressurized oil at the needles and keeps them a lot cooler. Even then, they have a more limited life than hydraulic rollers. I have had Crane hyd rollers in one engine for 20 years (no exageration) with not one issue. The hyd rollers last longer. The hyd rollers in my 10.5:1 CR 540cid engine produce 700 HP and 700 TQ - hyd rollers really work. |
yep they are......my only two choices with the heads and rockers i have is a hydraulic roller or solid roller.....decision is yet to be made.....when you only have time for 2500 miles a year in the car so a set of solid lifters lasts over 4 years, i don't mind that, i now have a baseline as to longevity. if i use a better lifter and change them out every 6000 miles i should be fine.