>which type of push rods are stronger ? hardened or chromemoly

 

chromemoly

 

I second that

 

>I guess that will be my decision then chromemoly it is .

 

Chromemoly for sure

 

Here's a cross-reference:

http://web.camaross.com/forums/showt...threadid=93709


Hardened chrome-moly (4130) is somewhat stronger than hardened low carbon (1015-1026) steel, but it's difficult to tell them apart unless they have manufacturer's part number or other ID on them. Both are stronger than non-hardened steel pushrods of course.

 

The alloy only tells part of the story, hard-drawn seamless chromoly (SAE 4130/4140) tubing for instance, can range anywhere from 125,000 psi tensile, to 275,000 psi. The heat treat process is the key.
Pushrods being an eccentrically loaded column due to angularity load and arc motion, are often strongest when in a configuration other than straight-tube. The key is putting the greater diameter/mass where it is needed most.

My .02

Gooday,
Mike

 

FWIW Chromemoly push rods are way over kill for sub 6000 rpms and stock valve springs pressures. I would only use them if you are running a cam that requires a lot of open seat pressure and 6800+ RPM. I would just stick to a stock replacement hardend push rod. But that's just my .02$


Joe