cam timing setting
 

Looking for suggestions to set cam timing on a 3.0 with 964 cams and 9.5 JE pistons
Thanks in advance for your help!

I have 964 cams with stock pistons. Been running 1.25 mm but just recently advanced to 1.50. Engine not back in yet so can't offer much feedback on the change.

964 spec.

What John said above.

Thanks for the answers-I will start with 1.25

A while back when I was researching this subject I saved these threads. Maybe one you haven't seen yet.

http://forums.pelicanparts.com/porsche-911-technical-forum/804405-installed-964-cam-3-0-sc.html

http://forums.pelicanparts.com/porsche-911-technical-forum/394539-964-cam-timing-please.html
http://forums.pelicanparts.com/porsche-911-technical-forum/953369-911-sc-3-0-performance-upgrades-5.html
http://forums.pelicanparts.com/porsche-911-technical-forum/235574-cam-timing-question-964-cam-ss-3-2-a.html

I've fitted a few of these over last couple years. And from advice from more experienced people, I found that timing spec changes the characteristic of the motor.
The 964 factory setting is 1.26mm. But if you advance to 1.5 you tend to bring the peak torque a little earlier in the rpm range. The trade off is you will likely have lower top hp.

The difference between the 2 settings is noticable, but neither is going to make you feel regret for not going the other way. Also, keep in mind you need to ensure adequate valve-piston clearance. However with your JE's in this case, I suspect you'll have plenty.