Thats what it should look like on standard turbo.
20BHP max on the peak is about right for a 120 T-jet with around 40bhp 40lbft in the midrange, then the more midrange you aim from the peak power will suffer.
Is it me or is this dyno graph wrong? basic maths say the hp and torque line should cross at 5252rpm when using the same axis scale hp/lbft or kw/nm? I reading it wrong? lol
And to have 30lbft gains at 1500rpm look suspect?
I run cars with Motronic me7.XX ecus and no matter what conditons, air intake temps, atmospheric pressure, humidity the cars always will make near enough stock quoted power within 5bhp+/- max. So to get 139bhp from a stock mapped ME7 ecu is not going to happed fully stop, Bosch have spent millions on the development of load based ecus, making sure car make quoted map no more no less not matter what conditions, even running eobd fault issues.
I have ran well over 3000 cars with Me7.XX ecus on rolling road over the last 8 years and never seen one make close to 20bhp over spec. Even with bolt on tuning mods you cannot up the power, because its all MAF v rpm v temp related. I would say the 122bhp from the DD rolling road is about spot on and is what I am used to seeing.
Then we move on to tuned engines, 95% of the quoted peak BHP output from tuners never make what they say on a rolling road. If your getting a huge 100nm+ 60bhp+ in the midrange and not huge gains on the peak power this is telling me that there is a hardware restriction, exhaust, turbo volumetric efficiencys ect.. You can aim for higer peak BHP but at a compromise to the midrange power band, you will gain the pub talk bhp but the car will be slower. I would be over the moon with 100+nm & 60bhp across the midrange if the lambda, ignition and boost is safe, I would be worried about 190bhp peak as the egts involved would really be causing engine stress.
The to the DV issues, fitted wrong or fitted with the wrong spring they will cause issuses with the power band. I see the old plastic Bosch DVs bleed boost of back into the intake and cause 20+bhp losses. Atmos dump vales will mess up the ADD MULT fuel trims and effect the injection time causing loss of power.
Then to the graph above 13bhp peak gain from a remap sounds pants and if we are working from 120bhp that 143bhp peak, but in the real world the remap seems really good, on the road I would imagine the car is very quick and would keep up with most cars because of broad torque band with close on 40lbft extra power.
IMO just an extra 4bhp across the midrange curve is 100 times better than having 15bhp on the peak power.
Nick