In Reply to: Faster due to no wind resistance during dyno... posted by ///Mike G on January 11, 2000 at 17:47:48:
: Also if you want to measure the performance gains or loss of a modification under OBD-II you have to clear the DME, dyno, make the mods, clear the DME again and dyno again. That is the only way to get true results.
: : I just had my 99 M roadster dyno tested in preparation to upgrading the exhaust and cold air intake. To my surprise, when we ran the test in 5th I got all the way to 150mph at redline (both on car's speedo and the dyno's).
: : I was expecting the computer to shut it down at 137, now I may reconsider buying the ODBII reprogramming from Dinan or Jim C.
: : I'll post all the results when the mods are finished, but stock HP was 211 at the rear wheels.
wouldn't you still expect the the speed limiter to cut in at 137, instead of pegging out the RPM limiter?