Another valve setting question........curious

[Bill Baer]

Originally Posted by 1320racer

EO/IC is the method every professional engine builder and race team uses to set/check valve lash regardless of lobe or lifter type.

Go the the Pro Stock pits immmediately after a round of qualifying, walk over to your favorite Team's trailer/pit and watch them check their valve lash, one cylinder at a time, using the EO/IC method.

The object is to make sure the cam lobe is on the base circle

Setting the intake valve when the exhaust is openings assures that the cylinder is at the beginning of the exhaust stroke and it's intake lobe is closed and on the base circle.
Setting the exhaust valve when the intake is closing assures that the cylinder is at the end of the intake stroke and it's exhaust valve is closed and on the base circle.
I have found this works on every four stroke engine from a Briggs &Stratton to blown hemi.regardless of the camshaft used.
I know a lot of guys use the "Mopar hood sticker method" but Keep in mind that most modern camshafts have more duration & overlap than those 70's Mopar cams.