Wos , absolutely correct about the hysteresis in the temp system.
That sort of answers the next point for Sako - most tuners use inertial or Eddy dynos with constant load for testing of 2T engines specifically as it emulates
the very dynamics we see on track.
That is , more power = more acceleration.
We never , ever see 9000 rpm for more than a split second after getting off the gas and down changing into a corner.
The pipe temp has dropped in that period and then what happens on the dyno , happens on the track - we give it full throttle.
Thus a good sim on petrol will reflect this with a wall temp of near 325*C at the bottom of the powerband , then if the dyno run time is correct , we will see the wall temp the
pipe sees on the track at full noise - around 425.
This is not the egt as seen in the header , that is affected by the A/F ratio used and the combustion parameters ( Compression/MSV/Timing ) and this influences the pipe bulk gas temp
that ultimately affects the wave speed just as much as the pipe wall temp does.
This pipe wall temp on petrol has been proven very accurate in many sims from 50cc to 300cc - but only if a realistic A/F ratio is used for the fuel.
I can see no useable benefit at all to doing step and hold testing of a 2T - doing correctly timed dyno runs simulates reality - just as we are trying to do with a sim.
And Al , you have a serious Catch 22 with belly length - make it longer and that generates a steeper rear cone , sure that limits overev , but even more so it affects negatively the front side power.
Once again my favorite saying , sorry - no free lunch.
And as I have already said , that R1 pipe tells you nothing apart from the 3 cone rear setup, as its designed to generate max power spread from 10,000 to 14800 from an engine with no PV , no PJ
and is limited by a flat line ignition.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
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