Measuring For Pushrods w/ 273 Rockers

[T56MaxTorq]

Hey guys I have a set of 273 rockers going on my 360 with RHS heads. I have a roller cam that has a lift of .534/.538

Having problems getting the perfect pushrod size. I'm using a checking lifter and adjustable pushrod. I think my rockers ratios are not consistent from one to another. I measure the perfect pushrod size for the exhaust valve (about .526 lift) I then throw the same pushrod on to the intake valve and I read barely .500

I'm going to make sure and double check everything and try different rockers. How far are these things usually out?

 

[Demonracer]

What rocker arms are you running? The factory cast rockers are notorious for being inconsistant. If you are running after market rockers, you may have some 1.6, and 1.5 mixed together. Just my thoughts, let us know how it turns out.

 

[67Dart273]

How about valve installed height? They the same?

 

[skrews]

lay a straight edge along the top of the valve tips and see if they are all the same height

 

[skrews]

lay a straight edge along the top of the valve tips and see if they are all the same height

 

[T56MaxTorq]

I will check valve installed height tonight. They're just a set of ancient 273 cast rockers on new shafts. Is there a good rule of thumb for inconsistent rockers? I was going to swap them around enough to get max lift on all valves within .020 of each other. This is just a truck engine so the tolerance doesn't need to be perfect.

 

[T56MaxTorq]

Valve stems were perfect. It's the rockers. And the wipe pattern over the valve stem isn't sexy. I ordered a set of hughes rockers, we'll see how they do.

 

[Abodybomber]

You won't regret it.Tried the cheap China crap,nothing cleared anywhere.Ordered a replacement Hughes 1.5 rocker,cleared everything on E-Brock heads.