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Hey guys, I've dug through some old threads but still trying to find a few questions left unanswered: - Does the 8cm version have any backpressure issues above 250rwkw? E.g. what backpressure/boost ratio is commonly found at 20psi+, is it less than 1.5:1? - Is the ramp rate of the 8cm version a lot more savage than the 10cm version? Which one would be faster off the mark? - In track conditions, does the 8cm version hold its own or does it get choked up top/end up with heat issues from being at high rpm.... - In terms of throttle response (e.g. driveability), which version is easier to drive? I drive my car mainly through the mountains and im starting to get regularly involved in track days, so I'm wondering which would be a better match for the car. Everyone seems to be telling me the 8cm coupled with HKS 256 cams is a match made in heaven for the S15, and the 10cm version will be a bit too laggy for a spirited street/track car... If i ended up porting the motor etc, would the 8cm still be a good match? Thanks in advance.