RanRich,
I have dynoed and tuned many drag race engines on the flywheel dyno. For 87 pump gas and 101 VP we shoot for 12.5 - 13.0 A/F under full load, over the entire range from 4500 to 7500 rpm. This gets us close and it is a safe ratio. The final A/F is tuned at the track based on actual vehicle performance and atmospheric conditions. It is rare that the best dyno tune yeilds the best track times. Usually the car performs best with slightly richer fuel mixtures that what the dyno likes.
I generally dont even care about A/F ratios at idle and part throttle (because the engine is not under much load), just that the exhaust temp at those throttle positions is not real cold or real hot, which it generally isnt - unless something in the tune up is way off.
If my 370 was reporting 14.7 under WOT i would get a tune to bring it to 12.7 or so, and then go to the drag strip to see what it likes.
I dont know if this helps, but this is the same approach I plan to use on my 370Z.
|