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Cam.....

You need to get to the cam to be able to measure lift and duration of the intake and exhaust lobes plus the timing difference between them. This involves at least an intake removal and maybe pulling the cam...... There might be other ways......
 
"southern_boy" said:
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Removing the valve covers and using a dial indicator to measure the 0.050 lift events and max lift event in relationship to cam degrees. This involves having timing marks completely around your harmonic balancer (which can be done with timing tape) and taking into account the cam turns at 1/2 speed of the crank. Also make sure to take the rocker arm ratio into account.

This is not as difficult as it sounds if you have the right tools - and I would measure from the lifter, not the rocker arm.

This info will allow you to characterize your cam fairly well (and you might even be able to match it agains some common off the shelf aftermarket cams).

Good luck,
-Rory
 
As long as your lifter is not hydraulic, and doesn't bleed down...
 
"Midlife" said:
As long as your lifter is not hydraulic, and doesn't bleed down...
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I doubt seriously if a dial indicator would exert enough force to collapse a lifter! Note I said not to measure from the rocker arm movement...

-Rory
 
It can be done from the pushrod to measure lifter travel, but you must remove the rocker arm first to unload the lifter. Even then, you'll get a few degrees of error, but it will be pretty close.
 
I guess I'd go from a different approach...which would require a timing chain gasket set. The cam number is normally stamped on the end of the cam. I'd just remove the water pump, timing chain cover, and timing chain and read what's on the end of the cam.
 
+1

In the end this is actually probably easier, more accurate and certainly would cost less too.
 
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