288 M Sport with THP: Dinantronics Performance Tuner Stage 1: Initial impressions

delvec03 · 09-19-2015, 08:21 AM

Quote:

Originally Posted by crqflier

Quote:

Originally Posted by BarryJI

The enhanced HP, while less immediately noticeable than the enhanced torque, will, I think, make the car quieter, more efficient and fun to drive at 100 mph on the freeway. Even stock, this engine makes only about 4000 rpm at 100 mph on a flat road. I bet I can be doing 120 mph at 4000 rpm with the tune. .

Did I miss something? How would a tune change rpm at a given speed - or speed at a given rpm? Was there a gearing change done?

yeah...I'm with ya. pretty confident that gearing is mechanical...

BarryJI · 09-20-2015, 01:18 PM

Yet when you throw the shifter to the left it adjusts the gearing for Sport mode, shortening the ratios and (I believe) eliminating 7th and 8th gear. I admit I was mistaken in attributing gearing enhancements to a tune but would you describe the above as mechanical or electronic? Or both?

Racer20 · 09-26-2015, 03:09 PM

Quote:

Originally Posted by BarryJI

Yet when you throw the shifter to the left it adjusts the gearing for Sport mode, shortening the ratios and (I believe) eliminating 7th and 8th gear. I admit I was mistaken in attributing gearing enhancements to a tune but would you describe the above as mechanical or electronic? Or both?

Gearing vs rpm vs road speed is fixed in all cars. If your car does 100mph at 4000rpm in 6th gear, there's no tune or button in the world that will change that. The only thing that happens when you hit the sport button is that the TCU will hold a gear longer before up shifting. It changes when the car shifts, and that's all.

09-20-2015, 01:18 PM	#24
BarryJI Captain 424 Rep 980 Posts Drives: 2015 BMW 228i M Sport Join Date: Apr 2015 Location: United States iTrader: (0)	Yet when you throw the shifter to the left it adjusts the gearing for Sport mode, shortening the ratios and (I believe) eliminating 7th and 8th gear. I admit I was mistaken in attributing gearing enhancements to a tune but would you describe the above as mechanical or electronic? Or both?
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