Back to backs are always the best but not often easy to do. Also, dynos do vary.
I remove my O2 when I dyno also. No issue in doing so as the O2 is out of the picture at WOT.
With a chip, stock headers & muffler, and cat bypas I dyno at 215 to 217 with 130k miles on the clock. My friend dynoed a bit higher with the same set up but a Bursch 1/1 sport muffler.
However, I suspect you can not change the chip. Still, I believe a chip can be gotten close to by playing with the AFM, Fuel Quality switch. Just can not legally do much with the timing (crank sensor & temp sensor inputs).
Again, the standard seems to be a properly sized Euro George headers w Phase 9's. That is the best system to test against.
I think the following info is very insightful.
Quote:
Originally Posted by Steve W
I've compiled a spreadsheet of expected power output values based on a internally stock 3.2 Carrera motor based on dyno tuning data that I've accumulated from many cars over the years. The output values are given in engine flywheel hp assuming a Superflow engine dyno such as at Jerry Woods. You results may vary, based on the flow quality of your muffler, but for a healthy 3.2 motor, I estimate these values to be accurate to within 2-3 hp of each other.
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