yes, since last update  i use 10% brake when calculating gear ratio.

For me the 11,5moi works perfectly fine, numbers are good on diesel and petrol cars, although I mostly do petrol cars.

think I remember jostein has it at 10,7 but that was measured with his bike engine kit car I guess. Way less rotating mass on that vs normal cars

I use 15% power correction and the numbers match what is to be expected between the range of 50-450hp cars.

one thing to keep in mind is diesels gear ratio’s are wildly different. On petrol cars I always use the gear before final gear, on diesels I use 2 gears down from highest gear.

HI again, today i have been on a maha dyno for comparing runs with mine, for matchs numbers with both dynos, my set up end up with 11.5 moi and 7,5 power correction.

one important thing to have in mind is that maha use ps unit and yourdyno hp, there is a little diference, and most dynos at least here in spain use DIN correction, with always show higher numbers than sae iso and ewg (those are almost identical, just decimals differences).

Using SAE correction on both and converting ps to hp, numbers match perfectly on a tdi and  2 petrol engines, range of 150-200 hp.

Between SAE and DIN there are arround 6 7 hp difference on a 165 hp engine.

ON the other hand brake control works better on yourdyno that on that  maha, rpm calibration works far better on yourdyno than on  that maha, even runs comparison is better on yourdyno.

Best regards tuners!

Nice! 

@ivanro_jo

Why is it necessary to make a power correction?

If you enter the correct MOI then it is not necessary to make a correction?

Or what .....

@mr-peter

As Jostein explain, it is necesary for compensate power wot  losses