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Old 03-04-2013, 11:48 PM
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1/2 Rhoads???

I've been contemplating using a magnum 292 cam that I've had for sometime in a 383 build. My compression will be a little low for this cam at 9.45 and I was considering using a half set of Rhoads or Crane High Intensity lifters to help with cylinder pressure. Has anyone experimented with using just a half set on a single pattern cam?

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Old 03-05-2013, 12:42 AM
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I once used a set of rhoades lifters before, but my oil pressure was so high that they didn't bleed off at all and ended up lashing the rockers,
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Old 03-05-2013, 12:52 AM
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You do not need to use these stupid lifters to make your 292 cam run good.

There are lots of other better ways to dial it in for your 9.5:1 cr engine.

Need more details on the engine , car etc. use normal hyd lifters.

Why would you bother with these noisy lifters (that also rob horsepower) when if the cam is a real bad match you can just buy a different cam that is a better match.? Makes no sense.

I searched a few of your other posts.

1. if you want the most engine torque do not use a 1.6 rocker on it. Use a 1.5 rocker. (a 1.6 rocker always makes less low rpm torque, always)
2. if you want more torque, advance the cam a bit more.
3. never mind the SCR/DCR BS. This will not tell you how the engine will actually run.
4. the 292H cam like to rev and needs gears and a 3500 stall converter... or more. (and you do not need to dummy this down for "mileage".)
5. it will be fine on gas. How you set the motor up and drive it will have more to do with it.

6. 9.5:1cr and the 292H cam is not a deal breaker at all.
7. get a degree wheel and dial indicator so you can find true TDC and degree in the cam.
and you may want to move it (accuratly) to maximize performance with 9.5:1. Again don't bother with the BS DCR/scr stuff...
you are just wasting time and effort.

8. if you really want fuel mileage, a much smaller camshaft is just flat out better.
9. But when set up correctly it need no be a gas hog. its in the setup. ( carb/distributor etc)

10. the biggest fuel mileage factor will be how aggressively you drive your car....by far....!!!

Last edited by F-BIRD'88; 03-05-2013 at 01:14 AM.
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Old 03-05-2013, 07:17 AM
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I assume you're thinking of using a set on the intake lobes only? There's no reason to worry about it- BUT with that being said Rhoads lifters are hard to predict and their action and noise is very application dependent- cam, springs, oil pressure, and oil are the main factors valve train weight can also play a role too though.

IMO I'f just get a more appropriate "white box" cam the cost is nearly the same and the results will be much better.
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Old 03-05-2013, 04:51 PM
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Quote:
Originally Posted by Kal81 View Post
I've been contemplating using a magnum 292 cam that I've had for sometime in a 383 build. My compression will be a little low for this cam at 9.45 and I was considering using a half set of Rhoads or Crane High Intensity lifters to help with cylinder pressure. Has anyone experimented with using just a half set on a single pattern cam?
I have done this on a Pontiac 455, intake side. Worked fine. When I did the Pontiac, the cam and lifters were going to be replaced but that never happened because it ran fine as-is.

However, there's a lot to be said for choosing the correct cam from the get-go, and that would be my recommendation.
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