Truck is back up and running!

[sprayedenali]

if theres play in the rockers wouldnt you need a longer PR?? or am i reading this wrong?

[f4tal]

Geoff told me to use 7.425 pushrods with stock height heads. So with my heads milled .030 I figured I'd be fine using a set of 7.4s I already had. Might have to second guess that.

Thats what i was told by Geoff at EPS. He said to run 7.4's on my milled .030 heads. I didn't feel like buying PR's twice so i put them in. They worked fine with the stock heads. They are extra loud now with the milled heads, i guess the valves are finally opening all the way. Haha

if theres play in the rockers wouldnt you need a longer PR?? or am i reading this wrong?

Thats my guess but supposedly you want a small amount of clearence for the oil to make it up and out of the PR thus providing lubrication. Plus With about .50 thousandths of play the PR moves so quickly that it causes the cam to become a solid roller at high RPM's. This is all hear say. Don't quote me

[farmtruc]

Thats my guess but supposedly you want a small amount of clearence for the oil to make it up and out of the PR thus providing lubrication. Plus With about .50 thousandths of play the PR moves so quickly that it causes the cam to become a solid roller at high RPM's. This is all hear say. Don't quote me

That first statement isn't a good rule to follow, there doesn't need to be a small amount of clearance for the push rod. Meaning you don't run a short push rod to allow oil to lubricate better, the push rod needs to ride against the rocker tip.

If Ur push rods have .050" of play between the rocker tip and push rod, then something's not right. Collapsed lifters or wrong pushrods.
Also, the tip of the rocker needs to correctly ride on the valve tip. Right in the center.

[f4tal]

See thats what i was thinking and believed.

So you think i'll be alright with the 7.4's?! Im guessing its just louder because the valves are actually opening fully now. Plus the compression is higher now. Either way at WOT it is wicked, well the one time i stabbed it so far. And everything checks out on the wideband/aeroforce so i guess i'll just have to get used to it.

[Longshank]

F4tal, there's nothing wrong with your pushrods. It's just the cam with that much lift is deffinately going to be a little louder than stock. Trust me Geoff deffinately knows what he's talking about. He tuned my first 5.3. He's one of the best. Seal up those exhaust leaks and it will sound better. Exhaust leaks on headers will fool you on valvetrain noise.

[f4tal]

Got the exhaust welded up today! Sounds TONS better and the truck is quiet again. As far as valvetrain goes, I can still tell it is louder than the old setup with the stock heads but I think it will be fine. It is VERY healthy

[farmtruc]

the way you were describing the noise in the first post and the tech info you supplied, it sounded like something was wrong, .040" lash, etc etc,

but to comfort you, some valvetrains are louder than others. for example, my gto is a bit on the loud site, but the truck is quiet, both have big cams, and everything is mechanically correct.

congrats on the new power, keep it floored!