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Originally Posted by CowboyDren
Actually, a pretty good number of people are running around with advanced S4s, which lose practically no power below 4000 RPM to S3s, with massive midrange punch and upper HP that still beats S3s by a significant margin. The Tomei cams make me really nervous; I don't like the idea of being able to flake material off of the cam shaft (not lobe, but shaft) with my fingernail.
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advancing the cams should lose bottom end torque and increase rpm, retarding the cams will gain low end power. if you look at the graph the s4 cams will pick up very high in the rpm band. Almost when it is time to shift. I would rather have a pull in a 2500 or 3000 rpm band. cars feel more powerful that way. also the comparison of the cams in that article are horrible who would measure power after it falls off (note the down curve on those graphs.) I have never seen any of there cams flake like that. If they did they would exchange them at no cost im sure. they have a real good customer service. there.
