Thread: Dialing Cam gears on 20V cams

Hey guys i've got some 20v cams on a stock sr20ve motor. I wanted to know if anyone had to dial in there cams and what degrees gave the peak performance??

0,0 is your friend.

^^^^^^ This.

Times three from me.

+5 intake +3 exhaust. That brings them close to stock. The cams need to be advanced on the regular sr20ve motor. Then You should add some on the intake side and see how much power you make on the dyno. I did this in 2005. We stopped because we were afraid to go further.

If 20V cams come from a 2L 0,0 is stock in a 20ve.

On a shaved head/block I could see going +5,+3 to bring it back to center.

20V and 20VE cams have different lobe center at 0,0.

20VE High Cam Lobe Center: 104 In./114 Ex.

20V: 114 In./108 Ex.


I believe Supercowboy is suggesting to move the 20V cams to the stock 20VE lobe center, the cams need to be advance +5,+3.

Just trying to piece together the benifits of advancing that cam on the same size crank.

The slight difference in compression and placement of intake divider in the head play that big of a role when using them in the 20ve?

Always been something I wanted to explore. Any input?

Ok ic what you guys are saying, but to achieve the 20ve centerlines you would retard the intake 5 degrees and be advancing the exhaust 3.
Right?

20v and 20ve lobe centres are off - n1 is off further again! 5speed and supercowboy are on the money.

Assuming youve got it back to square its going to be a catch 22 for sure. Personally i would avoid advancing it, the head is going to pick up VE by the time it hits 5k, ramping the cylinder up with more air and more bang than you would get on cranking the dynamic compression!

Ramping up the dynamic would help down low...but the timing sequence in top end would hurt it. Not much benefit unless you are chasing 1-4kRPM fuel economy.