F1Fever wrote:I agree. I also wonder why somebody hasn't make a tight lash (and I mean tight!, like .006") solid roller for the street?
Tod74 wrote: I had a lifter fail in a BBC and broke the block. It was a comp cams roller and the recomended lash was .028 and .030 so that is what I ran..I thought that was too loose but figured the cam company knows more than me ..well now I am paranoid .My new engine has a Crane grind and the cam card said .026 and .028..but to be safe I set them at .017. My question is...will this hurt anything? I used to think that the recomended lash was just whatever made the best power on the dyno...but since reading this board the last few months,I gather from the posts here,that the lobes on the cam are designed for a certain lash....that it isn't just a tuning thing.So, what effect(other than making the engine think it has more cam) will running a considerable amount less lash than recomended have?
crazycuda wrote: I have noticed on most solid roller cams (BBC and ford) alot of locals are changing out the lifters on a yearly basis because the roller pinions are wearing out.
CamKing wrote:crazycuda wrote: I have noticed on most solid roller cams (BBC and ford) alot of locals are changing out the lifters on a yearly basis because the roller pinions are wearing out.
If you go to a roller lifter with pressure oiling to the needle bearings, you triple the life of the standard rollers. Morel, Crower, Isky, and I think Comp all offer this type of lifter. We sell the Morels, which can be rebuilt for 1/2 the price of new ones.
The other thing you need to think about is, if you're going to go to a high lift, aggresive flat tappet cam to try and get the power close to that of a roller, it won't last long either. 24,000 miles is a lot for an aggressive flat tappet cam.
crazycuda wrote: Using $ as a factor the typ solid roller lifter set costs 300+ for a bbc.
cstraub wrote:The pressure fed lifters like Morel, Isky, and Crower will "cushion" the needles durning low rpm idle time in a street engine. The lack of oil splash at this rpm is the killer to lifters..
AdioSS wrote:cstraub wrote:The pressure fed lifters like Morel, Isky, and Crower will "cushion" the needles durning low rpm idle time in a street engine. The lack of oil splash at this rpm is the killer to lifters..
How come hundred of millions of hydraulic roller lifters that never see 4000 RPM live for years and years?
Could part of the problem be that when an engine builder builds a solid roller engine, they usually cut down oil flow to the lifters?
Is it all the oil routing inside the lifters?
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