-1/+1 will improve your idle.


2 marks each is +2/-2 cam degrees. When we speak of cam adjustments, we use cam degrees.

When we speak of lobe centerlines, we speak in crank degrees, and your setting puts you at 103/109, which is too tight for best power, and yes, will make the idle very, very choppy.

I would go back to 0/0.

 

thanks ted. i will try it.

 

i was looking through here and didnt find anything about comp 280 cams... i have them and was wondering what to set them at... i have a built motor with a ported n polished head w different springs, and a gt 35r on it at 26-28 psi...

 

Try -2/-1

 

soo it helped out the studdering when cold... it feels little better but doesnt hit as hard as it did when it was at 0 / 0...

 

The setting I gave will improve high rpm power because Comp Cams "280" only have about 265 deg or so of advertised duration, so they are not the long duration cams they appear to be to the common consumer. The 104 deg intake lobe centerline coupled with the mild duration closes the intake valve a little early, which makes the engine feel more torquey at low and midrange rpm, but the powerband will begin to drop early in the GT35R's power range.

 

soo youd still say to keep with your suggestion or should i play around a little and see what happens..

 

If you are skilled at tuning your own car, then you should be able to exploit the difference between the two settings.

 

we are just street tuning my car at the moment i need to get it to the dyno asap..

 

If you're street routine is consistent, you should be able to resolve the difference with Virtual Dyno Room.

 

where can i get that software??

 

https://www.evolutionm.net/forums/ec...simulator.html

 

Teb B any magic cam gear setting for GSC S2's

 

On the comp 280s, try -4/0. That is where I found best power. I'm on the IX turbo though so dialing out some overlap to reduce reversion may have been why it worked there.

 

soo you had a 20g... what else is done to yours??