460 roller rockers

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Jun 17, 2020 | 10:18 PM

kevinv10

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460 roller rockers

Figured this was a better forum to post this at. Doing a complete rebuild on my 1994 460. Will add a bigger cam. Are roller rockers any advantage? What ratio?
I have rebuilt many motors, but, always just generally stock. Appreciate any input for or against.
Thanks

Jun 18, 2020 | 04:25 PM

cougrrcj

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From: NE Ohio

Stock ratio is 1.73. Most roller rockers require studs and are adjustable as opposed to stock heads with positive-stop or pedestal style.

What is your intended use for this new build? How radical is your proposed camshaft?

Jun 18, 2020 | 05:25 PM

kevinv10

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Thanks for the reply. Undecided on a cam right now. Currently block is at machine shop. Need a set of heads I found out.
All my rebuilds have been just regular rockers, so my knowledge on rollers is poor, just heard them in a comment thought I would ask about them. And I may be confusing the term, I am asking about a roller tip where pushrod .makes contact from pictures I have seen.

Jul 8, 2020 | 07:02 PM

Mitch Huested

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Roller rockers are good for a few extra horsepower, and they reduce wear as well. However, due to the changes in oil, i have spent my money on roller lifters also! Stock ratio is 1.73, don't get the 1.7's that chevrolet ran, it will just limit your valves for no reason. There is also a 1.8 ratio out there if you want a little extra lift. It adds about .24 to your regular cam, but be sure that your springs can take the extra compression. Take pictures too! Would love to see your build! Good luck.

Jul 8, 2020 | 07:06 PM

kevinv10

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Quote:

Originally Posted by Mitch Huested

Oh trust me. I got pictures like crazy. Just got the block back yesterday. Bored .030 over. Painting the block now. Then rebuilding it. Gonna have new heads, Banks, cam, etc. Will post pics when done.

Jul 9, 2020 | 02:55 PM

Mitch Huested

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Quote:

Originally Posted by kevinv10

If you're going with new heads, I'd suggest you get a pushrod checking tool. Different heads can throw your valvetrain geometry off. They're only about $20, and well worth the extra effort. Several companies make custom length pushrod, most have them pre-built on the shelf. Competition Cams is just one such company. It's worth it to increase your pushrods to 3/8" as well, with .080 wall thickness and hardened for guide plates.
I have hydraulic roller lifters from Pro Comp(yeah, I know &#128527

but they're actually pretty sturdy units, inexpensive, and have had no problems with them. I'd hate to see you spall your lifters due to current oil issues! Even if it doesn't flatten a cam lobe, it's still a wasted couple of days to replace everything and put it all back together.

Jul 10, 2020 | 03:47 PM

mark a.

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" Are roller rockers any advantage ". Probably not if it's a street motor, plus your heads are going to need costly machine work, not to mention all the new parts to be bought, in no time a new set of bolt on aluminum heads will seem to be the way to go. I've never had a problem running Chevy 1.70 rockers on a big block or a Cleveland for that matter. If you set it up right, it will work ok.
I would check the pistons deck height now and work towards figuring a compression ratio and how to get it there. Was the blocks align bore checked ? It can't hurt to go to 3/8 push rods but If it's a hydro cam then I would save the weight and stay with 5/16. Hydro's don't use much spring psi compared to a solid cam

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Jul 10, 2020 | 10:43 PM

Mitch Huested

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Quote:

Originally Posted by mark a.

Anytime you can get rollers involved it's a good thing. Friction reduction =heat reduction. He says he's getting new heads, I just assumed Aluminum, all of which are machined for rocker studs and guide plates already. As a matter of longevity, 3/8 pushrods at .080 wall will take abuse better than the 5/16. Weight is immaterial unless you're building a true race motor, at which case I'd still want them for bigger cam numbers that engine would need. As for hydro roller cans, you're correct, they generally don't have the lift of a solid. That being said, I tend to overbuilding my short block because damage in this area is always expensive and time-consuming. I prefer to build it tough, so later add-ons still won't require me to pull the engine. Ultimately it's in his hands, I'm just giving him information to knowledgeably build a worry-free engine that will give him years of service, no matter what he does.