Quote:
Originally Posted by supershaft
Quote:
Originally Posted by SM2
Have you driven with the tune yet?
The chart shows a more constant power band rating with the stage 1 tune.
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are we looking at the same chart? the results are not linear whatsoever. Unless the definition of linear has changed in 2020?
anyone can make a tune look good but make for terrible daily driving. even on the x3 m40 forum people are complaining about tunes not being smooth.
again it's good for the track nothing else |
The graph looks good to me. I see a flat torque curve, with more power and torque than stock. I would be concerned if I saw a parabolic torque curve with spiking torque. Remember, this is not a naturally aspirated engine, those days are long gone.
As far as drivability, it's difficult to control power delivery with a small displacement engine (remember 1.5 liters feeding each turbo) because the engine can't make much torque without the turbos spooled. This is do to the combination of having small displacement and running lower compression for a forced induction engine. So, when the turbo spools you feel the engine spike in torque which usually will cause the tires to break loose. This is where having all wheel drive comes into play. If you stay in front of your peak torque, you will not feel that spike in torque. Also, having a torque converter will inherently help power delivery by acting like a shock absorber to the engine.
There's a lot more to it, I don't have time to get into, but this is a general summary in a nutshell.