[sand_man]

Originally posted by hobieboy
Well... I did recall & re-read that thread.

Reason for another post is: I intentionally retard my CAM after that post and what I'm seeing is NOT what its supposed to be.

The engine seems out of breath and my boost comes on waaaaayyyyy later. Hence want to re-ask the question.

I know each engine is different, but I think someone (DonE?) had tried different settings on same CAM - hoping to hear from someone.

Sandman, how did you know 1.65mm/1.7mm is optimal for your engine?
What does optimal mean in this case?

thanks.

Even though I did the final assembly on my engine, I had shipped the entire thing off to Performance Developments for all the machine work. They literally measured EVERYTHING. All tolerances were checked and/or fixed. I had SC cams purchased from Imagine Auto along with the 3.4L Ps&Cs (JE pistons with Supertec cylinders). According to Neil, he thought the cams should be timed at 1.7. I did 1.65 just in case and the car has been like a missle! Granted it does feel like it stops making big HP at around 5,500 RPMs...but it does pull like a train.

How did Neil know to advise about 1.7MM? I guess years of building and designing serious race engines gives a person that sort of "feel".