Hello guys. I am Evo IX owner and i am about to pick one of those two camshafts. As i see the s1 268 got higher lifts (11-10.5) than tomeis 270 10.7 - 10.2 270 de . But as i search some tech info i found out that tomeis got higher duration at 1mm lift. Tomeis got 224in and 225ex vs s1s that has 216in and 220out. My question is wich one of those can give more power in a stock engine and turbo? Higher duration means more power ?

 

In my opinion the Poncams are the best cams for a stock turbo setup in terms of response & mid to high end gains. I believe some guy on here had dyno tested them & posted the results in which HP gains were impressive at around 30+. I did get the chance to confirm the results while tuning an E9 myself with poncams installed. The only problem with the Tomei's is that they are hard to find & are often on back order for months.
I have also tested the S1s but on a non-mivec 4G63, stock turbo, I believe gains were around 15-20HP but the low-end response penalty was significant, likely because of the high lift.