Pushrod Questions

Pushrod Questions

So I checked a few more out and averaged the length to be 6.634 with no preload. With .050" preload, it's 6.684". Not sure if I want to go with more preload or stick with that number.

lead69 said
Sounds like you got it, I had an identical build and ended up using these
Trick Flow® Chromoly Pushrods TFS-21406700

Nice, thank you for the link! Those would give me approximately .066" preload. However I do see that they say "with guide plates", did you have guide plates on your build? I do not.

nm9stheham said
Be aware that the pushrod angle is a bit different for the roller block versus non-roller block. Because of this, some guys have run into the problem of the pushrods rubbing the pushrod holes in the non-roller heads when installed on a roller block. So be sure you check ALL the pushrods for clearance to the pushrod holes at max lift. Your lift is not a lot, so that may help avoiid any issues, but check for any pushrod rubbing in this setup.

Oh I've had that battle already. Took the heads off multiple times to fight that. I had originally had gotten the pushrod holes drilled out to 9/16". Something smaller than the true roller head hole diameter. When that still didn't work, they got taken off again and ground out the very bottom of the hole where I saw they rubbed. Wrapping old pushrods in multiple layers of tape, I tested then would grind some more until they didn't tear through every single layer of tape. I think as long as I stay with the original 5/16" thick pushrod I'll be okay. But yeah, if I hadn't already had the heads rebuilt I would have saved for some EQ heads. Live and learn!