Clean94Z

iTrader: (5)

Does anyone know the max lift on a stock shortblock? My cam is a .568 on the intake with a 1.6 and I want run a 1.7.

SStrokerAce

iTrader: (2)

Max lift has nothing to do with it.

You should worry if your springs can do that

infinitebird

iTrader: (11)

The shortblock does not limit your lift, the valvetrain does.

Clean94Z

iTrader: (5)

I'm talking about piston to valve clearance. I will put the correct springs on the heads but the intake lift will be .602 and I don't want to smack pistons. I have heard the lt1 motor has a health valve relieve and could handle that much lift.

SStrokerAce

iTrader: (2)

that depends on the valve events more.... more duration and less LSA along with larger valves cause the P to V clearance to shrink.

Bret

JasonShort

iTrader: (242)

Bret is correct....you should be more concerned with duration since I assume you are using stock valves (or dont want to pull the heads).

Just as a very vauge reference.....I have run a 242 duration cam with right at .600" (112LSA) lift on a stock shortblock/stock head setup. I did run a thinner gasket (FelPro 1074/.039") and P to V was .095" on the intake valve.....I didnt feel comfortable pushing it any more than that since I prefer to have over .100-.110" clearance.

Jason

Clean94Z

iTrader: (5)

The cam is a 236/242 .568/.548 on a 109 lobe sep. The heads will be ported with larger valves. With the 1.7's it will make my lift .603/.582.

firetird

iTrader: (1)

250/256 .630" or so on a 112. no problems with ptv clearance. I am also running a thinner head gasket. That being said, or typed rather, you should always check. i am also running a 2.0 1.56 valve setup.