I just did this a couple days ago (5* of seperation) and it is so smooth

 

is it me or I just only count 2 degrees of separation b/w +1/-1?

How can one go about obtaining the lobe centerline for GSC cams?

 

On most Cam Gears 1 line =2 Deg so i'm lost on that one. I'm set at -4 In / -1Ex on my 272's and it's true 1 deg is alot had it at -4in/ -2ex.

 

This is a tad misleading. When setting MOST cam gears the lines represend 1 degree but may actually create more adjustment in the motor.

Setting -2/-2 means two lines back on the gears.

 

So when you say -2/-2 do mean -2 lines on the Gear or 2Deg's, Becouse my HKS Gears say 1 line = 2 Deg's. so if i wanted -3 Deg's i would have to set it at 11/2 lines to get -3 Deg's. If this is wrong please help me.

 

hahaha pwned, i changed it.

 

So 13+ months since Silver Surfer did his cam timing dyno test here, has anyone else done anything similiar with the 272s to compare powerbands of the different setups?

 

All I can add to this is that I've tried all the different settings and I personally like the midrange pep that -2/-2 provides. I have irregular idle only when the car is very hot otherwise it sound pretty close to stock. The car has never stalled on me but it does occationally dip down to 500 rpm if I am inching forward slowly.

If I had to do it all over again, I wouldn't even get cam gears.

 

+1.

Anyone have any experience with this setup?

 

I run +1/-1 and the idle was very lopey before tuning it out with a EMS.

 

I think my 272/264 are at -3/-3 or -2/-2, what did you want to know?

 

dyno numbers, driving impressions between different settings, have you tried the recommended -4/-1, was there a difference between stock settings and what you have now, and if you had to do it over again would you get them again? Thanks.

 

The only difference you will notice is the idle a MAYBE a little sense of power change in the midrange.

Like I said, I dyno'd the different settings back to back and the CG's did is move the powerband around. If you want drag racing power go with -4/-1 if you want road racing power go with -3/-3. I was unable to dyno -1/+1 but when I changed my gears to match that setting it provided a VERY unstable idle. To get the car to idle right I had to dump 10% more fuel in at idle as well as add 5* of timing. I don't like the idea of fouling my plugs to get my car to idle so I went back to -2/-2. They have been there ever since and give me the best daily driver powerband (4k-7k).

 

With HKS 272s, set your exhaust cam to -1 and you'll never need to move it.

If you want quick spool and fat midrange torque for road racing, set the intake cam to +1. Yes, it will have a lumpy idle, and it will be fun to drive on the street.

If you go drag racing, where rpms never really drop below 5000rpm, move the intake cam to -4 or -5. This will smoothen the idle, delay spool time, and move the powerband up in the rpm range where you need it the most.

 

Why at -1 for the exhaust cam ?