0-62 Acceleration times for various E89 models including prediction for remapped N20 engined versions

Tarzan · Post by **Tarzan** » Mon Jan 27, 2020 11:41 pm

The fastest are the red ones

Pbondar · Post by **Pbondar** » Mon Jan 27, 2020 11:45 pm

Nictrix wrote: ↑Mon Jan 27, 2020 10:14 pm What makes the 28i auto faster than the manual when the rest of the models the manual is faster than the auto?
Other than the 35 models.

The E89s with the 6HP has a shift time around 700-800ms per gear..the initial launch management was less sophisticated and lock up was achieved at higher rpm ..the net effect was that for the 6HP equipped cars the auto was always slower than the manual..the mechatronics were an earlier design

On the other hand the 8HP benefited from two extra gears so a closer set of ratios allied to a 200ms or less shift speed plus much better launch control and torque converter lock up with a more sophisticated ECU management during the shift , ie keeping the engine on the boil..

So the 8HP progressively shows a progressive advantage the greater the power output being controlled..it breaks even on the 20i gets ahead with the 28i and would show a little more with a remap..

As speed climbs that advantage is lost in the gross overall time..

That’s why the ZF 8HP seems to come alive with the remap..it’s shifting through the close ratios faster and more frequently than the 6 speed manual.. There are some other refinements in shift speed ie variable shift time in sports+ mode which I assume was used for the 0-62..

The DSG boxes show the same logic with even faster shift speed

These days you’ll see several people who are reprogramming the ZF8HP for much reduced shift times..

Maybach_man · Post by **Maybach_man** » Mon Feb 10, 2020 8:12 pm

The guy who mapped mine altered the gearbox 'map' as well.

Pbondar · Post by **Pbondar** » Mon Feb 10, 2020 9:22 pm

Maybach_man wrote: ↑Mon Feb 10, 2020 8:12 pm The guy who mapped mine altered the gearbox 'map' as well.

On the 0-62 sprint with one or two changes it may shave off another 100ms or so

Busterboo · Post by **Busterboo** » Tue Feb 11, 2020 12:31 am

Pbondar wrote: ↑Mon Feb 10, 2020 9:22 pm On the 0-62 sprint with one or two changes it may shave off another 100ms or so

That'll make shopping quicker.

step_change · Post by **step_change** » Tue Feb 11, 2020 2:27 pm

Can BMW tell that you've had the engine remapped when they plug their diagnostic tools into it?

Pbondar · Post by **Pbondar** » Tue Feb 11, 2020 3:12 pm

step_change wrote: ↑Tue Feb 11, 2020 2:27 pm Can BMW tell that you've had the engine remapped when they plug their diagnostic tools into it?

If they persevered enough then yes, initial first pass unlikely as they would be only looking for fault codes..

sunnydays · Post by **sunnydays** » Tue Feb 11, 2020 5:52 pm

step_change wrote: ↑Tue Feb 11, 2020 2:27 pm Can BMW tell that you've had the engine remapped when they plug their diagnostic tools into it?

Yes if they really want to check.

Maybach_man · Post by **Maybach_man** » Thu Mar 19, 2020 10:09 pm

Pbondar wrote: ↑Tue Feb 11, 2020 3:12 pm
step_change wrote: ↑Tue Feb 11, 2020 2:27 pm Can BMW tell that you've had the engine remapped when they plug their diagnostic tools into it?
If they persevered enough then yes, initial first pass unlikely as they would be only looking for fault codes..

It shows immediately that the ecu has been tampered with in red

buzyg · Post by **buzyg** » Thu Mar 19, 2020 11:09 pm

A fun exercise. I do love stats, good effort.

Rob M · Post by **Rob M** » Tue Mar 24, 2020 4:20 pm

Good effort. Thanks!

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