Check Cam/valve Lift

Grumpy · Jan 28, 2020

What is the best way to measure the camshaft lift still in the motor? Using a micrometer, got .300 on the pushrod side. So, with 1.5 rocker arms, that should put .450 on the valve. Right? But when I measure the lift on the valve side, I'm not close to .450. Missing something here. Appreciate all the help in here. Bruce

Id also point out that stock stamped rockers that are nominally a 1.5:1 ratio, are typically closer to a 1.45:1 ratio at best.
yeah you can skip the links but youll skip a great deal of related info if you do so.
take the effort to verify what your dealing with ,don't guess.

READ LINKs
http://garage.grumpysperformance.com/index.php?threads/identify-that-cam.8582/

http://garage.grumpysperformance.co...et-it-to-last-cam-install-info.90/#post-57942

http://garage.grumpysperformance.co...ng-cam-and-shifting-the-lca.10553/#post-44949

http://garage.grumpysperformance.com/index.php?threads/cam-degreeing.9010/#post-35474

AND TAKE THE TIME TOO
,read this link
http://www.engineprofessional.com/articles/EPQ215_18-38.pdf

OR
KNOWING WHAT YOUR DEALING WITH HELPS,
you can use a degree wheel and a crank turning tool and graph out the lift ,
vs degree of rotation, to verify the cam lobe lift/duration,
if you have the correct tools,

https://www.summitracing.com/parts/cca-4790/overview/
get the smaller 9" version for use in the car , cam degree checking
the 18" versions for checking on the engine stand
the knurled ring, on the damper crank turn tool, below, comes off the damper turn socket so the degree wheel slides on, then its replaced

https://www.summitracing.com/parts/mor-62191/overview/
a crank snout, turning socket,

http://www.summitracing.com/parts/pro-66830/overview/

Grumpy · Jan 31, 2020

both offset retainers and valve locks exist that will allow .050 added height,or clearance, but be aware added space reduces the valve spring pressure

http://garage.grumpysperformance.co...ng-height-load-on-a-l98-383.14592/#post-77688

http://garage.grumpysperformance.co...tched-valve-spring-required.13774/#post-77425

http://garage.grumpysperformance.com/index.php?threads/what-springs.11352/#post-51835

http://garage.grumpysperformance.co...-loads-and-installed-height.10709/#post-46658

http://garage.grumpysperformance.com/index.php?threads/valve-guide-cutting.8382/#post-29239

Check Cam/valve Lift

Grumpy

The Grumpy Grease Monkey mechanical engineer.

Grumpy

The Grumpy Grease Monkey mechanical engineer.