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Re: Which is better ball cup or ball ball pushrods and why? [Re: MR_P_BODY] #1675478
09/23/14 10:28 AM
09/23/14 10:28 AM
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Posts: 29,314
Oregon
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AndyF Offline
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AndyF  Offline
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Oregon
This setup on my 514 engine is good for about 0.900 lift. So the cup style pushrod will work at high lift, but you need to buy the right parts.

8278350-jesel.JPG (320 downloads)
Re: Which is better ball cup or ball ball pushrods and why? [Re: Monte_Smith] #1675479
09/23/14 10:42 PM
09/23/14 10:42 PM
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Posts: 16,516
Western NC
440Jim Offline
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440Jim  Offline
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Western NC
Quote:

I wouldn't say one or the other is BETTER, just depends on the quality of parts used.
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Now I will say, that in the case of a standard 3/8 pushrod deal, I prefer ball/ball because the pushrods are one piece and you can get them in .180 wall.


Monte,
I have seen mixed comments on the one-piece pushrods. Some manufacturers say the pressed in ends are better because the material can be different for the ends and the separate ends "can be" machined more accurately without thinning out the pushrod when forming the one-piece end.

My new motor has pressed in ends, 0.120" wall, 3/8" dia, ball-ball with T&D paired rocker system. That should be plenty with less than 800 open pressure.
Quote:

Features Include:

Highest quality 4135 seamless Chromoly tubing for extreme applications
Straight tube any length
180,000 psi tensile strength
240-degree ball for excellent rocker arm cup clearance
Salt bath nitride surface treatment for outstanding wear properties and strength
Tips are made from high impact, wear-resistant 8620 barstock that is case hardened and cryogenically treated and tempered




Re: Which is better ball cup or ball ball pushrods and why? [Re: 440Jim] #1675480
09/23/14 10:46 PM
09/23/14 10:46 PM
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Posts: 29,314
Oregon
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AndyF Offline
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Jim, if your engine isn't together yet then take the time to provide clearance for larger pushrods. Buy one set of 1/2 inch pushrods just for clearance checking. At some point in the future you can swap over and see if there is any performance improvement. I think you'll find some power.

Re: Which is better ball cup or ball ball pushrods and why? [Re: AndyF] #1675481
09/26/14 11:09 PM
09/26/14 11:09 PM
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Posts: 5,872
communist bloc of new jersey
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jamesc Offline
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communist bloc of new jersey
Quote:

Jim, if your engine isn't together yet then take the time to provide clearance for larger pushrods. Buy one set of 1/2 inch pushrods just for clearance checking. At some point in the future you can swap over and see if there is any performance improvement. I think you'll find some power.




that's a good idea Andy and i agree

don't spend much time here these days but "think" i learned a little bit about push rods recently. for the more highly stressed components used these days i'm of the impression stepping up to a 7/16" double taper is a good idea. if i ever get my junk together i will be using more than a 3/8".

as for the ball/ball ball/cup thing i think it's a mixed bag. recently i learned (i think) of using copper/beryllium in cups. i haven't seen the parts yet but am curious to say the least.
in recent months i've seen some VERY stout, seriously stressed valvetrain components (over 1" lift and STIFF springs) and was impressed.

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