Rhoads lifters
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Junior User
Joined: Aug 2003
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Rhoads lifters
Has/Does anybody use Rhoads lifters in their motor? Do you like them? Are they junk? Has anybody ran a correct size cam with conventional lifters and then swithced to Rhoads and see an improvment? I've heard that the Rhoads are only for guys wanting to use a cam that is to big for their application and want to get some lowend torque back, but I've also been told that even if you use a cam that fits you application you can run Rhoads for more lowend torque and also increase the powerband by about 500 rpm? So whats the low down?
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
Rhoads lifters
OK, Please correct me if I am wrong, but Rhoads Lifters collapse on the downslope of the cam and allow the valve to close faster than normal.
This would improve the idle and decrease the overlap on a high lift cam with long duration. It would also increase the dynamic compression on a long duration cam. Both of these things will increase the torque.
If you have a stock motor with a short duration cam and no overlap, you will get neither of these benefits or very little.
If you have a long duration cam, and your compression is right for this cam, then by increasing the dynamic compression you may cause detonation.
If you have a long duration cam, and not enough compression (too much cam), then Rhoads Lifters may work for you.
The real benefit of Rhoads Lifters is to allow you to use a bigger cam than your engine can use without other mods.
This would improve the idle and decrease the overlap on a high lift cam with long duration. It would also increase the dynamic compression on a long duration cam. Both of these things will increase the torque.
If you have a stock motor with a short duration cam and no overlap, you will get neither of these benefits or very little.
If you have a long duration cam, and your compression is right for this cam, then by increasing the dynamic compression you may cause detonation.
If you have a long duration cam, and not enough compression (too much cam), then Rhoads Lifters may work for you.
The real benefit of Rhoads Lifters is to allow you to use a bigger cam than your engine can use without other mods.
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
Rhoads lifters
I have used the Crane Hi Intensity lifters, which are just like the Rhoads. These are not a performance enhancement, they are a crutch for poor cam selection. If your cam, compression ratio, induction and exhaust are properly matched there isn't anything to be gained from these. If you run 8:1 compression with a 320 degree cam you can crutch the mismatched components with these lifters and get back a little lowend.
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