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Originally Posted by fordracer
I have to disagree with you on this. Ford has been running roller lifters since 1985 and I believe GM started in 1986. If durability were an issue the manufacturers wouldn't use them in 100,000+ mile motors.
As for performance, just the reduced friction and resulting oil temp is enough for me. Also a roller follows the cam precisely allowing for faster opening ramps. |
Well, a stock roller cam with low duration and low lift isn't subject to the same abuse as a performance roller with long duration, more aggresive lobe profiles, and higher lifts. Anyone expecting 100,000+ mile durability from a 385 series with a roller cam of any kind is going to be sorely dissapointed.
The biggest problems with hyd rollers in the 385 series are the weight of the lifter itself, and the undesirable pushrod angles resulting from the taller lifter. Some people run them without any problems, but as an engine builder it's not something I'm going to recommend to anyone. At the end of the day, If you're looking for more performance than a hyd flat tappet can offer, a hyd roller is not the answer in my opinion.