Forcing N54 to shift at redline …xHP doesn’t seem to make it happen

pbondar

Sergeant
May 30, 2020
415
235
0
With the TTE500 hybrid turbos the N54 engine now wants to rev to the redline..previously it was a waste of time as power fell off well before 7,000 rpm.

I’ve set xHP to shift 3,4,5 at 7k...in all modes

However I notice when doing 3rd gear pulls and 5th gear dyno runs that the DCT box shifts around 6,650-6.750

Is there a way to force it to shift at 7k to eek the last few rpm?

Or is the TCU/DME saving me from any follies?
 

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pbondar

Sergeant
May 30, 2020
415
235
0
Manual mode and paddle shift ?
Have you contacted Xhp ?
Yes all modes same result ..D S M…not asked xHP..thought I’d ask here first?

it’s suggested that the shift logic is not that accurate..may try asking for 7,200 and see what gives?
 

pbondar

Sergeant
May 30, 2020
415
235
0

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TOR COILS

Private
Jul 3, 2019
29
1
0
Ride
n55
What is the best shift speed for dct? I'm single turbo. Want to get the fastest 1/4 mile. At present, M xhp is set to 7200rpm, but it seems disobedient. He will automatically change gears at 7000rpm.
 

135boost

Corporal
Oct 28, 2017
242
1
133
0
Finland
Ride
135is
6at let the shifts be pulled up to 8100rpm if needed.

Dme max rpm is 32x255 so 8160rpm is dme maxxed out.
 
  • Informative
Reactions: wheela

DirtKurt

Corporal
Nov 5, 2016
179
196
0
NH
What is the best shift speed for dct? I'm single turbo. Want to get the fastest 1/4 mile. At present, M xhp is set to 7200rpm, but it seems disobedient. He will automatically change gears at 7000rpm.
For manual mode with no auto upshift this is what I run
Screenshot_20231116_182227_xHP Flashtool.jpg
Screenshot_20231116_182213_xHP Flashtool.jpg