Pushrod length question.
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From: Bridgewater,Ma
Pushrod length question. I'm installing a TR224 on 112 and ported heads on a 01 Camaro.The heads were milled .025 and cc at 62cc.Head gasket is a cometic .054 held in place by ARP studs.
Will I be ok with the stock lenth pushrods (7.40)or go with the shorter ones (7.35)????
Thanks <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Will I be ok with the stock lenth pushrods (7.40)or go with the shorter ones (7.35)????
Thanks <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Launching!
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From: Homestead
Re: Pushrod length question. Every thunderracing cam is ment to work with stock pushrods. With that thought, everything u take outa yer heads you have to take out of your pushrods. I would start doing that after .030 off the decks. you are only going .025 .. . Stick with stock length pushrods Chromemoly, www.thunderracing.com <img border="0" alt="[pimp]" title="" src="graemlins/gr_pimp.gif" />
<small>[ December 01, 2002, 07:14 PM: Message edited by: shadowSS ]</small>
<small>[ December 01, 2002, 07:14 PM: Message edited by: shadowSS ]</small>
Re: Pushrod length question. The TR cams have a .030 smaller base circle, so if the heads were milled .030 you would be back to the stock pre-load right? In that case, 7.400 would be just right..
Dan
Dan
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From: Orlando, FL
Re: Pushrod length question. Check the preload! Don't estimate it. I only shaved 0.015" for use with my XE-R 224/228 and I was at 0.080" of preload with stock pushrods. Comp recommends ~0.030" of preload. I ended up going to 7.350".
Tim
Tim
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From: SW Florida
Re: Pushrod length question. Tim...
I can't understand why Comp Cams would recommend any lifter preload other than what GM recommends for stock GM lifters.
Now, use a set of Comp Cams lifters, and I can understand them recommending possibly something other than a stock preload.
Why would Comp Cams know whats better than GM for stock GM lifters?
<img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
I can't understand why Comp Cams would recommend any lifter preload other than what GM recommends for stock GM lifters.
Now, use a set of Comp Cams lifters, and I can understand them recommending possibly something other than a stock preload.
Why would Comp Cams know whats better than GM for stock GM lifters?
<img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
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From: Bridgewater,Ma
Re: Pushrod length question. I figured I'd be OK.Just checking since I have no valvetrain noise now with the stock Heads that maybe I should get them shorter for the Shaved Heads.
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Verdad Gallardo TECH Regular
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From: Orlando, FL
Re: Pushrod length question. For a totally stock valvetrain GM may know best but GM as you know doesn't do anything with the aftermarket in mind. A stock engine is redlined at 6200... at those RPMs lifter pump up is not a high risk. At 6800-7000 the risk becomes greater. A lifter can pumpup with as much preload as it has. So "if" a lifter were to pumpup all the way your valves would be hanging open my your preload amount. Obviously this is a bad situation. Is it likely to happen? Probably not... but why not reduce the chance of problems when it is so easy to do.
GM put a 10-bolt in the car... obviously they know best right?! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Tim
GM put a 10-bolt in the car... obviously they know best right?! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Tim
