almost done, pushrod question

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Aug 4, 2004 | 09:10 PM

panchop

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Melting Slicks

Joined: Dec 2000

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From: mesa,az

almost done, pushrod question

i need to buy a set of hardened pushrods. the cost is all over the place. $35-$135. what do i need for my little 6500 RPM 327 street motor. gotta use the .1" longer ones for the edelbrock heads and i am using comp pro magnum rockers.

Aug 4, 2004 | 10:14 PM

SWCDuke

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All pushrods have hardened tips, but the "hardened pushrods" you refer to are probably the type that have hardened tubes. These must be used it you install pushrod guideplates, which I don't think are necessary on a street engine that will not be revved regularly beyond 6500.

Duke

Aug 5, 2004 | 11:07 AM

CFI-EFI

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From: The Top of Utah

Quote:

Originally Posted by SWCDuke

All pushrods have hardened tips, but the "hardened pushrods" you refer to are probably the type that have hardened tubes. These must be used it you install pushrod guideplates, which I don't think are necessary on a street engine that will not be revved regularly beyond 6500.
Duke

Are you referring to the hardened push rods? The guide plates? Or both?

Every sbc needs to employ one, and only one, of the three methods of keeping the tips of the rocker arms aligned with the valve stems. If guide plates are the method of choice, hardened push rods are a MUST. It has nothing to do with strength or rpms, it is a matter of wear. The guide plates will wear into non-hardened push rods, adding shrapnel to the oil and weakening the push rods.

If not guide plates, then a head, like the cast iron stockers with the slot, cast in, to guide the push rod, or self aligning rocker arms. ONE method is needed to keep the rocker arm tip over the valve stem, regardless of the rpm range of the engine, even in order to idle. Two or more methods on a single engine can cause binding in the valve train.

RACE ON!!!

RACE ON!!!

Aug 5, 2004 | 11:20 AM

Vetterodder

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Joined: Feb 1999

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From: Fountain Hills AZ

Quote:

Originally Posted by panchop

The Edelbrock heads use guideplates so you definitely need hardened pushrods as they recommend. I believe the difference between the low cost and high cost rods has to do with the material they're made of. Low cost ones have a hardened surface, high cost ones use a harder steel to begin with. I've been running the "low cost" ones with Edelbrock heads for several years without any problems.

Aug 7, 2004 | 12:20 AM

LiveandLetDrive

Melting Slicks

Joined: Jul 2002

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From: Boulder Creek California

Are there any downsides to self aligning rockers? They seem like the best option...

-Chris

Aug 8, 2004 | 09:30 PM

comp

Team Owner

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From: eville in

not that i have heard,,, i'm interested myself

Aug 8, 2004 | 11:39 PM

Vetterodder

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From: Fountain Hills AZ

Quote:

Originally Posted by LiveandLetDrive

Are there any downsides to self aligning rockers? They seem like the best option...

-Chris

See CFI-EFI's post above. If the heads were designed for self-aligning rockers, they are the right way to go. If the heads were designed for use with non-self aligning rockers, they may work with self-aligning rockers with modification (and the removal of guideplates if they have them). Keep in mind that there's a much better selection of non-self-aligning rockers out there than there is for self-aligning ones.

Aug 9, 2004 | 12:25 AM

panchop

Thread Starter

Melting Slicks

Joined: Dec 2000

Posts: 2,130

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From: mesa,az

what the hell,went with Isky chrome molly 1 piece. $140 but at this point.....

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Aug 10, 2004 | 08:28 AM

Red Tornado

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From: OBAMA IS HITLER

Quote:

Originally Posted by panchop

what the hell,went with Isky chrome molly 1 piece. $140 but at this point.....

if there's still time to change your order, you may want to go with +.100 TrickFlow hardened 1 piece, these are about $85 from Summitracing..........http://store.summitracing.com/defaul...rods+trickflow

Aug 11, 2004 | 12:38 AM

#10

h rocks

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Joined: Apr 1999

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From: Ohio

Timing is everything...see if you can use these Comp PR's--7.200" 5/16" .080" wall hardened. Like new...maybe 200 miles on them? I paid ~ $125. How about $65 shipped?

Aug 11, 2004 | 06:04 AM

#11

panchop

Thread Starter

Melting Slicks

Joined: Dec 2000

Posts: 2,130

Likes: 1

From: mesa,az

thanks but the iskys already in the engine. i like to use the local speed shop and not order from the internet. sometimes it cost a little more in more way then one.