strongest Pushrods?
Banned
Joined: Apr 2006
Posts: 1,875
Likes: 1
From: Naperville, IL
In 5/16" you can get 0.116" wall from Trend and Smith Brothers. Next step would be 3/8" pushrods. Diameter buys more stiffness than wall thickness. Weight on the lifter side isn't as important as the valve side. Clearance may be an issue depending on your heads. I have also read from several people who have seen our motors on Spintrons with 5/16" pushrods that they flex a LOT!!!! Crane recently introduced 3/8" guide plates and pushrods for their rockers due to the Spintron results they observed during testing. If they went through the trouble to tool up for this then there must be a market/issue.
In 5/16" you can get 0.116" wall from Trend and Smith Brothers. Next step would be 3/8" pushrods. Diameter buys more stiffness than wall thickness. Weight on the lifter side isn't as important as the valve side. Clearance may be an issue depending on your heads. I have also read from several people who have seen our motors on Spintrons with 5/16" pushrods that they flex a LOT!!!! Crane recently introduced 3/8" guide plates and pushrods for their rockers due to the Spintron results they observed during testing. If they went through the trouble to tool up for this then there must be a market/issue.
Teching In
Joined: Dec 2006
Posts: 39
Likes: 0
I agree w/vettenuts 1000%. I have 3/8 Smith Brothers in mine, no clearance issues but thats OEM heads and rockers. As they say " your results may vary". Also Terry Manton, Manton pushrods, has a very interesting tech page on column theory. Manton pushrods are also very highly regarded in the racing world and deserve consideration.
Crane wasn't specific on their results with regards to RPM. I do agree that many setups with the high valve spring loads, especially with TFS and ETP heads that require longer pushrods, can benefit from 3/8" pushrods. Often overlooked in my opinion.
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agree with you there. I never had any issues yet with 5/16" stuff, but it's always a thought on the BIG builds.
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