[cwa]

Use 1st gear transmission and then switch to 2nd gear at 4000 rpm. I want to know why it cannot run to 7000rpm

[Dawgz]

If there is wheel spin / slip the TCU will upshift.

[forcefed]

That's how launch control is programmed, it short shifts into second. But if you brake boost and launch the car normally it'll be slower than using launch control so the short shift is beneficial and whatever else bmw programed into it.

[hellcat2m4]

Someone correct me if I am wrong, but I noticed ever since flashing XHP the early upshift to second does NOT happen anymore. It allows you to spin through first if needed.

[Dawgz]

Originally Posted by forcefed

That's how launch control is programmed, it short shifts into second. But if you brake boost and launch the car normally it'll be slower than using launch control so the short shift is beneficial and whatever else bmw programed into it.

Even in launch control you will reach 7k in first gear.

[forcefed]

Originally Posted by Dawgz

Even in launch control you will reach 7k in first gear.

Post a video of that.

[kgelfen360]

I just did LC yesterday on completely dry sunny day and it short shifted to second gear.

[yousefnjr]

Originally Posted by forcefed

Post a video of that.

Don’t mind the shaky hand and crappy 60ft

[Dawgz]

Originally Posted by forcefed

Post a video of that.

I have bm3 logs of my LC passes, goes to 6900 in first.

[cwa]

Originally Posted by hellcat2m4

Someone correct me if I am wrong, but I noticed ever since flashing XHP the early upshift to second does NOT happen anymore. It allows you to spin through first if needed.

Can XHP fix the issue of entering second gear early

[forcefed]

Originally Posted by yousefnjr

Don’t mind the shaky hand and crappy 60ft

Originally Posted by Dawgz

I have bm3 logs of my LC passes, goes to 6900 in first.

What mods? Xhp? My car is stock and it short shifts into second.

[hellcat2m4]

Originally Posted by cwa

Can XHP fix the issue of entering second gear early

For me it seems to have fixed that.

[cwa]

Originally Posted by hellcat2m4

For me it seems to have fixed that.

xhp stage3 ？

[hellcat2m4]

Yea just stage 3 no other settings changed, I am not running Drag race mode.

I am also flashed with BM3, but I dont think that changed the short shift setting, I am pretty certain it was the XHP trans flash.

[cwa]

Originally Posted by hellcat2m4

Yea just stage 3 no other settings changed, I am not running Drag race mode.

I am also flashed with BM3, but I dont think that changed the short shift setting, I am pretty certain it was the XHP trans flash.

Thank you very much for informing us. Also, have you tested a 1/4 mile launch test at this stage

[hellcat2m4]

I don't have a road long enough to do a 1/4 hit near me unfortunately. But have done around 20 launches using launch control, and roughly about the same with just foot braking in D3 without launch control.

Also many 60-130 runs (over 250 at this point)

[cwa]

Originally Posted by hellcat2m4

I don't have a road long enough to do a 1/4 hit near me unfortunately. But have done around 20 launches using launch control, and roughly about the same with just foot braking in D3 without launch control.

Also many 60-130 runs (over 250 at this point)

What is your 0-60 launch time? May I know your ins so that I can contact you easily

[hellcat2m4]

2.66 using the E50 OTS map.

[yousefnjr]

Originally Posted by forcefed

What mods? Xhp? My car is stock and it short shifts into second.

Clip is with the CS trans flash and e55 tune

[Abacus38]

You are spinning hence why the up shift. You’ll either have to put Drag radials on or have your tuner input the proper tq limits in each gear for you. Unfortunately can’t set tq limits in XHP if you are on BM3 custom rom so your tuner has to set it inside the tune. I’ve cut a 2.3 0-60 on stock tires with a 1.52 60ft using LC and limiting the tq in 1st gear