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Old 12-29-2006, 03:03 PM
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Roller Rockers

I have a stock 350 in a 72 Chevy pickup. I pull a trailer and would like a little more HP. I have MSD ignition and Edlebrock intake and 650 carb with ceramic headers. Will roller rockers help give me a little more HP? Is it worth the money and effort?

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Old 12-29-2006, 03:12 PM
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It often gives a little boost in power, but its rarely a good bang-for-buck modification when done alone.

Its main benefits are reduced friction at the valvetrain. Often good for 1-2 hp, but its not a big deal.
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Old 12-29-2006, 03:44 PM
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Have you thought about changing the ratio? Im assuming it has 1.5 stamped rockers now. If you wanted to step it up and spend money on rollers might as well go to 1.6 or even 1.7. That would definitely give you a little more power and also slightly bump the power band with that smidgen more dur/lift. Just a thought.
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Old 12-29-2006, 04:12 PM
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Quote:
Originally Posted by DeathRattle
Have you thought about changing the ratio? Im assuming it has 1.5 stamped rockers now. If you wanted to step it up and spend money on rollers might as well go to 1.6 or even 1.7. That would definitely give you a little more power and also slightly bump the power band with that smidgen more dur/lift. Just a thought.
That is not a drop-in modification. The pushrod holes must be elongated to prevent the pushrod from binding in the hole.

tom
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Old 12-29-2006, 06:05 PM
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And its only worth power if the heads flow better at higher lifts. The stock cam is probably a little on the wimpy side which is why more lift often makes more power, but it bears checking before investing.
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Old 12-29-2006, 06:11 PM
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I know they are good for mopars. One of the best things you can do(cheap). But I guess thats me comparing apples to bananas
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Old 12-29-2006, 06:13 PM
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Mmmm... bananas.
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Old 12-29-2006, 06:23 PM
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TOM is absolutely correct. Bigger ratios can be problematic.

Depending on who did the tests, full roller rockers are good for 2-8 hp.

Most of those old style factory rockers are a little short of the 1.5 they are suppose top be, so as CompCams says, using their rockers helps because of better ratio and some friction reduction. Is $ worth the little gain?

Your best bang for the buck might be a flat tappet "pulling" cam in the 210* range. Places like Summit have an in-house brand where the "full kit" price (cam, lifters, gears) will be about the same price as the full roller rockers and might give you 25 lb ft more torque where you need it.

Don't forget to maximize what you have with a proper carb and distributor curve.
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Old 12-31-2006, 01:18 PM
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I was thinking of using stamped rockers with roller tips. Not to expensive. Should I try to go for 1.6 or would that be to much for my stock cam and heads?
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Old 12-31-2006, 01:27 PM
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Quote:
Originally Posted by Mertz
I was thinking of using stamped rockers with roller tips. Not to expensive. Should I try to go for 1.6 or would that be to much for my stock cam and heads?
I've never seen a stamped rocker with a roller tip. CompCams roller tip/ball pivot rockers are not stamped.

1.6 shouldn't be a problem with a stock cam. Usually lifts up to .475 are ok on most V8s before the keepers hit the valve seals.
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Old 12-31-2006, 02:30 PM
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They showed a bunch of different kind of rockers on Horsepower TV. The had some that were stamped and just the tip had the roller. I haven't tried to find them yet but I intend to. I would like to see what they cost.

I just checked and Perfromance Parts has them in 1.5 and 1.6. They also show a set that is self aligning. $129 for the self aligning 1.5 $120 for the 1.6 (does say self aligning but they have a cheaper set at $82.

Last edited by Mertz; 12-31-2006 at 02:37 PM.
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Old 12-31-2006, 02:50 PM
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If you dont have screw in studs and guides then you need self aligning roller rockers.They were right I would'nt get 1.6 ratio.Just get 1.5 ratio.
Like mentioned bove a small cam swap would be a significant difference.I had a 256H XE comp cam in my 72' C30 for awhile and it was nice strong torque,good mileage,great overall power.Much more enjoyable to drive than the stock cam.I only swapped it out to a bigger one because I was looking for a more lumpy idle.
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Old 12-31-2006, 03:49 PM
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heres a set of 1.5 ratio, roller tip, self aligning for $104. This could be something you were looking for.

click here
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Old 12-31-2006, 05:05 PM
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I would go with a set of Comp Cams roller tip rockers if it were mine. They may not give a noticeable HP increase but will increase the longevity and durability of your engine.

Vince
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Old 12-31-2006, 05:28 PM
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The Performance part rockers are chrome molley. These a mag steel. Which do think are better? I would think chrome molley.
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