Originally Posted by Mike@N54Tuning.com
277rw is what cars put out stock on this dyno. That is pretty normal I think for dynojets. If you are only making 277rw with full bolts ons your dyno reads lower or your car is making less power than others. Did you do a few runs stock + FBO to ensure you had the full advance and no throttle closure? Sometimes you can game the system by doing a "stock boost" run with the wrong adaptions and get a really low number but you won't be able to make that over 2-3 pulls stock tuning. Find a better dyno to find out.
There another dyno I did my 135i on which gave me 295whp baseline FBO stock mapping. Needless to say, the numbers made more sense on that dyno hitting 424whp. Goes to show without a baseline, peak numbers are useless.