My builder has the short block almost finished and I need to verify how far the opti drive pin sticks out. If I remember correctly from when we measured one on a buddies car, it's about .600"? I'm talking about how far it sticks out once you remove the opti, NOT the length of the pin itself. Can anyone confirm? Thanks!

 

GMPP says dowel max length from face of cam is .620"
(DynaSpark says .605")

The dowel max OD is .250" if you had to hammer it in and it mushroomed.

 

Thanks, I'll pass those numbers along to him! Much appreciated...

 

My stock pin was .650 in length from the face of the cam (and looked like it could have been longer without a problem).

 

Mine was about ~ .650 as well, and was not too close to bottoming out.
Brandon

 

Be careful when installing an aftermarket cam (yeah, I know most cams installed are aftermarket ) because they can have wildly different length dowels compared to your oem cam dowel. A dowel that is no more than .620" will work just fine. Too long of dowel (and I don't know how long) will definitely shorten the life of your Opti's bearing. This is a critical fitment and I'm not sure how consistent the tolerances are on Opti's housings either. I hear they can vary.

 

Yeah, my Comp Cams pin was .840" .