Do LS2 engines come w/ hardened pushrods??
Race Director
Joined: Sep 1999
Posts: 12,438
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From: CONCORD NC
aftermarket pushrods are great (I like Smith bros), but you really need to try and avoid mechanical over-revs, or you're likley going to throw a rod through the side of the block, let alone bend a pushrod.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Originally Posted by hodgeee
No they don't and when doing a cam or heads and cam it is recommended to go with adjustable pushrods if you are going to .580 or taller compression.
Thread Starter
Pro
Joined: Feb 2006
Posts: 690
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From: VA
Everyone tries to avoid the over rev, but I can`t tell you how many times at the track I have heard ticking LS1`s. All my friends w/ LS1`s bent or even broke their stock pushrods at one time or another. 
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Racer
Joined: Nov 2005
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Originally Posted by SpinMonster
What?
You don't need adjustable stronger pushrods, just stronger pushrods, adjustables are just so much easier to adjust the valves with. I did a 1.8 rocker swap on a ls1 motor, and the adjustable pushrods made the job a snap.
Last edited by hodgeee; Feb 14, 2006 at 07:17 PM.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Originally Posted by hodgeee
The stock lift levels are like .530 to .550 inches, this is how much the valve springs compress with every revolution of the motor. The stock valve springs maximum safe compression is like .560 inches of compression. So if you are going anything over .560 of compression with the new cam, of course new springs are needed. The stock pushrods are fine, but run into strength issues when getting over .560 of lift also. For every bit extra of lift, it creates more pressure on the pushrods as well as the springs, retainers, hats and what not of the valvetrain.
You don't need adjustable stronger pushrods, just stronger pushrods, adjustables are just so much easier to adjust the valves with. I did a 1.8 rocker swap on a ls1 motor, and the adjustable pushrods made the job a snap.
You don't need adjustable stronger pushrods, just stronger pushrods, adjustables are just so much easier to adjust the valves with. I did a 1.8 rocker swap on a ls1 motor, and the adjustable pushrods made the job a snap.
I think you mean adjustable rockers. I'm sure it was an oversight/typo on your part.
Take care
Racer
Joined: Nov 2005
Posts: 293
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Originally Posted by SpinMonster
Adjustable pushrods are used to check the length of the pushrods needed to get the geometry right up top and not intended to even be run in a motor nor could they be.
I think you mean adjustable rockers. I'm sure it was an oversight/typo on your part.
Take care
I think you mean adjustable rockers. I'm sure it was an oversight/typo on your part.
Take care
I am surprized you have never heard of adjustable pushrods?
