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Originally Posted by dayofpain
actually, i hate to not fuck up my sale, however the stock and sti pieces are tube and fin design, which increases backpressure and turbo lag. the m2 piece in question is a bar and plate design which decreases lag and inhances performance becauses of the fact that it flows about twice as much as air, and cools it about 40% more effectively.
the only way to cause more lag would be to get a front mount with tube and fin design, ala' the worst of both designs. then you would be really fucked into a corner. however most front mounts are bar and plate, so that doesnt happen.
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I never realized the actual design plays a part in the lag characteristics. I thought the biggest factor in the lag was simply the volume of the IC. Basically a big IC needs a big turbo, or you'd have to wait for the little turbo to presurize it. Esp. the FMIC's since you have to push all that air along the pipes to and from the IC. I figured bar/plate vs tube/fin would simply change the effectiveness of the cooling, and not have much of an effect on flow. Interesting stuff!