nate90

Hello guys just need some input and actually confused about a couple of things. I have prc 227 heads ms4 cam with ls7 lifters and a 370 with -2 diamond pistons. I am having some confusion on getting the pushrod length correct. I have the comp checker and I get 12.5 turns until zero lash on intake side but then on exhaust side I am coming up with 12 turns. I am certain I am at TDC and have tried this on differnet cylinders and comes out the same or maybe this is normal not sure. Any input would be great. Thanks

Tuskyz28

Call Texas speed.... If not somebody that knows valvetrain like Brian Tooley. I would reach out to him first since he is not that hard to get in touch with.

nate90

Ya I was Monday just didn't know if this is something common or if some one has seen this before

KCS

iTrader: (20)

First of all, it's not TDC you need to be worried about, it's whether or not the lifter is on the base circle of the cam. You can use the EOIC method to make sure.

Second, how are you getting 12 turns? You should be starting at zero lash and counting the turns until the rocker seats on the stand and the bolt gets tight.

nate90

I have never seen the eoic method and the turns are with the comp pushrod checker. Not the turns to get the bolt tight

KCS

iTrader: (20)

Google Exhaust Open Intake Closed method. If you're at TDC overlap, the intake and/or exhaust lifters could be on the ramp of the lobe instead of the base circle. With the EOIC method, it ensures the lifters are on the base circle so you get accurate measurements.