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#1
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Rhoads Lifters. Has anyone used these?
I've read about these variable duration lifters that improve low-end torque, vacuum, and fuel economy with a "big" cam. Has any one used these before? They 'bleed-down' at lower RPM to make your cam seem smaller which boosts all of those things mentioned above. And then as RPM goes up, the "bleed off" disappers to give your came back its full lift and duration. Jeg's sells them for 440's for $100. Any info would be helpfull. These sound like a really cool buy and would work well on the street with a radical cam. And I need all the vacuum I can get. Thanks-Jack
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#2
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They do work but they are only a band-aid to fix a problem that needs to be corrected. Did you think of installind a vac pump?
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#3
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Hey 75.
I put a set of the Rhodes in my 440 w the 509 cam, trying to tame it a bit. They calmed the idle a bit, vacuum picked up an inch to 6 at idle in gear. I had (had) power brakes and with that vacuum it was a horse. 72 Satellite 3850#. 75, I test and tune with a G-Tech and lost almost 2 tenths 0 to 60 mph times, the top end was flat, that sweet 6000 rpm pull was missing. Anyway they may work for you, I'll send them to you free, you grab the shipping. They have aboot 200 miles on them. They will be fine with some assy lube. |
#4
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I have run them too. But, what is going on with any variable lifter is, it is changing cam timing. Effectively advancing the cam since the change comes at the trailing edge of the profile. It would be best to not start out with an advanced cam timing. And some experimenting with cam timing is a worthwhile venture. So is oil viscousity!!
So, if you don't want to dig into the engine and do the final tuning, it would be best to start with a smaller cam!! |
#5
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They are a great bandage, until you bring the compression up to where it belongs.
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#6
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I used them with the MoPar 288 oval track cam. This tight c-lined cam in @ 106 chopped like an ax. It was a little hard getting it nice for the street. After the Rhoads lifters were installed, it calmed down enuff to get the carb dialed in better, idle was improved and it was easy to feel the improved torque of the engine.
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#7
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I tried them on my "340". I hated the constant clattering noise they made. Went back to stock lifters. Much better.
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#8
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hello, a friend tried them in his stocker 360, wouldn't stay pumped up after making a pass. would bleed down, clatter on return road. bent a few pushrods also. just food for thought.
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#9
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I have used them in a small block with MP 292 cam. Worked for me just as intended.
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#10
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Wow, apparently you love em or hate em. Put me in the love em group. Have used them on 3 different engines and they worked as advertised. They do clatter a little but not enough that anyone has ever asked about them. Currently have them in with an aggressive Hughes cam and my idle and vacuum are great.
Rhoads must be doing something right they have been around forever. |
#11
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Don't get me wrong (in my earlier post). I loved them in my application. However, the engine would have been better off with the correct lifters and the correct compression, to go with the cam.
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#12
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Quote:
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