.726" lift by means of what lobe lift and rocker ratio is key in this question you pose.
solid roller vs solid flat tappet
can you get a flat tappet that would perform as good as a solid roller? just wondering why we spending money on these solid rollers and they have lifter issues and seem to not be the most reliable things around ..
how aggressive can you go with a flat tappet . is a .726 lift and a 270 dur easily done with a flat tappet and yet get the valves closed early enough that you get decent cylinder pressures? thanks
how aggressive can you go with a flat tappet . is a .726 lift and a 270 dur easily done with a flat tappet and yet get the valves closed early enough that you get decent cylinder pressures? thanks
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Sure, you could run a very "tame" cam for a solid roller lifter and get the same performance out of a more radical cam for a flat tappet lifter. But you can't get a flat tappet that will match the performance of a solid roller for the kind of ramps that you typically run a solid roller for, because they can't handle those kind of ramps. Example: You could technically get a roller cam that has similar specs to a stock profile 460 camshaft, but why would you? On the other end of the spectrum, you can't get a flat tappet that will handle, oh, say .770 lift. So you have to run rollers.
You can get aggressive flat tappet .770 lift cam's, But it will cost you 3k+ for a set of a tool steel cam and tool steel dlc lifters.Sure, you could run a very "tame" cam for a solid roller lifter and get the same performance out of a more radical cam for a flat tappet lifter. But you can't get a flat tappet that will match the performance of a solid roller for the kind of ramps that you typically run a solid roller for, because they can't handle those kind of ramps. Example: You could technically get a roller cam that has similar specs to a stock profile 460 camshaft, but why would you? On the other end of the spectrum, you can't get a flat tappet that will handle, oh, say .770 lift. So you have to run rollers.
Best to run a solid roller cam endurance lobe!!
Cheers, Bob
ohh i did not think of the rocker ratio but i have 1.73.726" lift by means of what lobe lift and rocker ratio is key in this question you pose.
what about a smaller lobe lift flat tappet and runing more ratio on the rocker to achieve same lift?
I know, Bob. But I was trying to keep it simple and I'm assuming the op is talking about street-ish since he's worried about reliability of the solid roller. Just an example.You can get aggressive flat tappet .770 lift cam's, But it will cost you 3k+ for a set of a tool steel cam and tool steel dlc lifters.
Best to run a solid roller cam endurance lobe!!
Cheers, Bob
Short answer: No, you cannot get a flat tappet cam to match performance of a solid roller.
Research flat tappet cam problems... likely find more issues than roller cam issues. Flats frequently fail due to assembly lube, start up, and oil quality. Rollers frequently fail due to poor quality (cheap) parts.
Research flat tappet cam problems... likely find more issues than roller cam issues. Flats frequently fail due to assembly lube, start up, and oil quality. Rollers frequently fail due to poor quality (cheap) parts.
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