I was wondering what kind of power differences might I see between durations and lifts,

Take my current mods, 22-23 psi, and 264's 272's or 280's and a reflash what kind of power difference will I see?

 

350 whp?

 

Looking at your current mods, you should buy a few other mods prior to purchasing cams.

Walbro FP, downpipe, 02 housing, LICP.

Just my 2 cents.

Plus, the GSC S1 cams would be a better fit if your looking for midrange power, especially on the evo 9.

good luck

Jason

 

from what i have seen & dyno'd a few hks combos all with a oem turbo & tuned for each set-up, your lloking @ about 10-14 peak whp from each grind. all cams drive nice on the street, but you do loose transient response when going from 264 => 272 => 280.

actually my wife liked the 280 cams the best, as you dont have to be so sensitive with the throttle pedal around town, however when you step on it, it better to be slightly higher in the revs, 4k / 280's vs 3k / 264's.

The gsc s1 offer similar top end power to the 272's but MUCH better transient response than the 264's & 272's !!