Total valve lift?

When figuring total valve lift using the cam card, does one subtract the hot lash setting from total to achieve the actual lift?

quote:

Originally posted by markemark:
Total valve lift?

When figuring total valve lift using the cam card, does one subtract the hot lash setting from total to achieve the actual lift?

Yes, a$$uming that the rocker arm ratio is accurate.

Yes. I would still check assmebled. I have not seen any that where exactly dead on what they should be. Slight difference in rocker ratio I guess is why. Plus always good to check for accuracy and cost nothing.JMO

On a new build I set lash at Zero and check P/V if its good at zero lash I know its good at "X" lash

Yes but….

Tap a razor ( knife blade style) blade between the retainer and the spring bottom side . That’s your platform for your dial indicator. Make a flat stand off your valve cover bolt hole for mag base. Zero your rocker arm after determining heel of cam. Zero your indicator and roll it. There is your total lift. Make sure the indicator is parallel to the valve angle and zero the Indicator .
Hope that helps

This message has been edited. Last edited by: BP758,

There’s lots of deflection loss in actual lift.

quote:

posted November 04, 2025 08:47 AM Hide Post
There’s lots of deflection loss in actual lift.

X2

Bob

quote:

Originally posted by BP758:
There’s lots of deflection loss in actual lift.

Barry,
An easy way for one to see how much defection they have, is to measure lift with the springs they are going to run, and also measure lift with a light checking spring.

Stan