I always imagined it was in the 20-28hp range...but I really have nothing that I am basing that on except feel. I can definately feel the engine going in and out of lean burn. Mine can do 75-80 without going out of lean burn. I can do over 3000 rpm and remain in lean burn...try it in 3rd gear. I usually keep it below 2500 but it can do higher. I also find that my vtec e does not feel like it changes to 4 valves/cyl until about 3500 or so. On another subject, for those VXers, I highly recommend climbing hills in 3rd with lean burn instead of 5th/full throttle. I dont have a super mid, but my mpg has gone up since I have done that.
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