I-C5

iTrader: (1)

Im building a iron lq4 6.0 with ls2 pistons and rods, with milled 241 64cc heads, 7.4 push-rods, t-rex 242/248 - .608/.612 - 110 lsa cam, and ls2 head gaskets...My PTV is crazy i cut .160 on both exhaust and intake....exhaust has .080 clearance but the intake has 0 clearance..


Did i do this right?
I was measuring with my 7.4 and a solid lifter (that's where i f'ed up). i put the pushrod length checker at 7.3 which gives me 0 lash and preload of .1 and spun it with no problems. is this the correct way?

NoMoreFWD

iTrader: (1)

I use the adjustable push rod set to zero lash. I start short and tighten down the rocker, check the clearance at the valve and lengthen until close.

I am not understanding what you mean by a preload of .1?

With the depth of those cuts and that cam I would say you have more than enough clearance. My concern would be the thickness of the pistons with that deep of cut. I am not sure how much material the top of a stock piston would have?

I-C5

iTrader: (1)

I think i finally did it correct. i didnt have any clearance issues...but it does come close to hitting on the intake valve.

ThreeHonks

iTrader: (10)

intake valve is where you need to be careful. Be sure to check radial clearance as well of the valve. the exhaust valve doesnt usually have as much problems, seeing that the exhaust valve "chases" the piston as the engine is running