Engine Why do I keep snapping pushrods

Jcsports

New Member
May 20, 2019
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Rochester
So I have a 94 stang lightning block 5.8 swap Holley heads trickflow stage 3 cam pushing 500+ crank pushrods have been measured at the correct length runs fine after replacing pushrods valves are sealing so the pistons aren’t contacting the valves do I just need hardened pushrods for this amount of power? I just keep snapping the heads right off right around 6500 rpm
 
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Geometry seems right roller is right on the center of the valve hydro roller system I heard you need to check lash periodically on aggressive cams for these motors it’s been together a two years and I never touched it and it’s dry because I cleaned it with brake clean before the picture
 
They’re pretty much stock strength though. At any decent spring pressure it’s time to step up to hardened push rods. Trickflow makes chromoly ones for like $100
 
Thought about it, any the don’t make tha length.


Those should work.
 
Perfect thanks dude!
Thought about it, any the don’t make tha length.


Those should work.
 
Anyone heard anything about periodically checking lash on these motors? If so how often and do you check it by just resetting it?
Once you get a few heat cycles it’s not a bad idea to check preload. You running a hydraulic roller, correct?
They should stay pretty well adjusted.
 
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I’m going to put a set of lifters in too just to make sure I don’t have any issues any suggestions?

Was thinking these
Once you get a few heat cycles it’s not a bad idea to check preload. You running a hydraulic roller, correct?
They should stay pretty well adjusted.
 
I’m sure they’ll work fine. In all honestly, the stock ones work good too. You were probably just bending/deflecting the push rods which made it seem like the lifter may have been having problems.