Rhoads lifters

MRL Performance said

They are made to be used in severely OVER CAMMED engines to tame them down at low rpm, then make it come alive at high rpm. I have used them with success since that blowup with great results. I have a set of the VMAX lifters in a race engine running a solid cam. The torque curve was like a turbo Diesel, came on early and hung in there forever.

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I've used them in mild engines with "tame cams"...


I put together a 318 with 10.5 TRW forged pistons, stock 340 cam, and a 68 318 heads and intake and carb. It idled at 24" Hg, but would overheat after running 20 minutes when the temperature got above 80°. I had to lower the compression....

So I threw a set of 77 360 heads and 69 stock 340 intake with a Holley 600 Vac sec, and it only lowered my vacuum to 22.5" at idle. It brought my compression down to 9.2. I ran a 10.5 power valve and could accelerate at 13" vacuum and keep out of the power valve. 17.75 true highway mpg... I put almost 450,000 on that engine before finally retiring it....


They also worked great in my 340 with a MP .484/284° cam. It gained about 3" hg at idle and had a much smoother idle at 300 rpm's less....