I hope you get it sorted mate but your making better bhp than me but as i sed flywheel figures can be whatever the guy doing the run wants it to be. The guy who did mine changed my losses from something like 33% to 50% and my car was then running 290bhp at the fly!!!

By the way what was your at the wheel figure think mine was 186bhp.

not got the graphs to had butwill check and post them up and i'll try and get the graphs up to so everone can get a look;)
 
Yeah, a RR just measures torque at the wheels. From this it can calculate an accurate power at the wheels by multiplying by the engine speed. Power at the flywheel is, as you say, an estimate based on assumed losses (usually 15-20% for FWD). My car was 175bhp stock and 211bhp remapped so not too bad.

Assuming a 20% loss you could calculate your flywheel figure by mutlipling your at-the-wheels figure by 1.25. Still, you wouldn't know how accurate the dyno was tho.