[Gr8ZongB58]

--> Dragy Run

--> RES exhaust launch by

Excuse the commentary in the dragy video, buddy is a tesla driver experiencing a real car lol

[suby01]

I approve.

[MFschwifty]

When using launch control do you release the brake the instant you see launch control active and the checkered flag pop up or hold until a specific RPM?

I've tried a couple different methods by letting the launch control climb to 3k RPM, releasing the instant I see the pop up, and also just attempting to release the brake at different RPMs but always wind up bogging before taking off.

Only once have I been able to shoot out of a dig without bogging down but of course was not paying attention to where the RPMs were at the time of launch.

[Gr8ZongB58]

Originally Posted by MFschwifty

When using launch control do you release the brake the instant you see launch control active and the checkered flag pop up or hold until a specific RPM?

I've tried a couple different methods by letting the launch control climb to 3k RPM, releasing the instant I see the pop up, and also just attempting to release the brake at different RPMs but always wind up bogging before taking off.

Only once have I been able to shoot out of a dig without bogging down but of course was not paying attention to where the RPMs were at the time of launch.

I haven't really tested the difference between 2k-3k rpm while launching. Never really payed attention to that after I see the "launch control active" pop up. I sorta just feel my car out and go.

My dragy video has me releasing pretty quick only because I saw a car come around the bend behind...GOTTA GO! 😆

My xHP settings with custom launch control is currently set to: Set Launch Torque= +15% & Torque Scaling After Launch= 18%

All the diff bolts and tranny talks has spooked me and now im all dialed down.

[MFschwifty]

😂 those GOTTA GO! moments are very familiar to me, and then I'm gone like the wind before anyone's the wiser.

I'm curious to know others experience with launch control as it continues to climb up the RPMS the longer you hold it. Initially I thought the more boost you build the more intense the launch but I always seem to bog down before it launches. Then when it does launch, it feels not so different then when I just floor it from a normal stand still.

I'm running Xhp stage 2 but haven't made any adjustments, just straight up OFS stage 2. Maybe I should toy around with the torque settings for launch.

I wonder if the trans could be detecting too much torque at launch and purposely bogging down? Did you make any adjustments to the torque limits per gear or change the setting to override brake booster protection?

[Gr8ZongB58]

Originally Posted by MFschwifty

😂 those GOTTA GO! moments are very familiar to me, and then I'm gone like the wind before anyone's the wiser.

I'm curious to know others experience with launch control as it continues to climb up the RPMS the longer you hold it. Initially I thought the more boost you build the more intense the launch but I always seem to bog down before it launches. Then when it does launch, it feels not so different then when I just floor it from a normal stand still.

I'm running Xhp stage 2 but haven't made any adjustments, just straight up OFS stage 2. Maybe I should toy around with the torque settings for launch.

I wonder if the trans could be detecting too much torque at launch and purposely bogging down? Did you make any adjustments to the torque limits per gear or change the setting to override brake booster protection?

I do have my torque reduction upshifts per gear reduced by about 8-10%. I did not turn on brake boost override. If you did not adjust launch settings then most likely the stock launch control is reducing your torque hence why you're experiencing the bogging.

[MFschwifty]

Originally Posted by Gr8ZongB58

I do have my torque reduction upshifts per gear reduced by about 8-10%. I did not turn on brake boost override. If you did not adjust launch settings then most likely the stock launch control is reducing your torque hence why you're experiencing the bogging.

I'll give those adjustments a try and report back with my results.

Thanks for the advice.

[AshtonPJT]

Originally Posted by MFschwifty

I'll give those adjustments a try and report back with my results.

Thanks for the advice.

Launch control is a little funky, if you go to high on the rpm it will bog if you go low on the rpm but not enough boost it will bog. Need the sweet spot of rpm and boost.

[MFschwifty]

Originally Posted by AshtonPJT

Launch control is a little funky, if you go to high on the rpm it will bog if you go low on the rpm but not enough boost it will bog. Need the sweet spot of rpm and boost.

I made the adjustments shown based on recommendations, and a few additional ones and did see some improvements. Launch was more crisp and felt considerably more torque at launch, upwards of 1.25 Gs so that was fun .

Not my fastest times but improvements as of late. I suspect the warmer weather is having a big effect on performance recently since I've run 3.6s 0-60 with -1,500 DA.

I have to get a mount for my phone so I can start tracking how much boost I'm building. I use the JB4 app for my boost gauge but can't really watch it while it's in the center console tray.

[suby01]

Right. Once you see LC in your screen you need to wait 3 seconds ish. If you go as soon as you see LC its too early. And holding it 5 seconds for sure is too long.

You have to guess on your car. And then you need to replicate it each time.

[Gr8ZongB58]

Originally Posted by MFschwifty

I made the adjustments shown based on recommendations, and a few additional ones and did see some improvements. Launch was more crisp and felt considerably more torque at launch, upwards of 1.25 Gs so that was fun .

Not my fastest times but improvements as of late. I suspect the warmer weather is having a big effect on performance recently since I've run 3.6s 0-60 with -1,500 DA.

I have to get a mount for my phone so I can start tracking how much boost I'm building. I use the JB4 app for my boost gauge but can't really watch it while it's in the center console tray.

For torque limits per gear, I just fully sent it since we don't really have to issues with wheel spin. Kinda wish I kept on the throttle because I let off too soon to record a good 1/4 mile time. Next time!

[RICH S202]

Aside from the XHP tuning, what else are you tuned with? A jb4? Thanks

[MFschwifty]

For torque limits per gear, I just fully sent it since we don't really have to issues with wheel spin. Kinda wish I kept on the throttle because I let off too soon to record a good 1/4 mile time. Next time!

That was a nice run you had, I think you'll easily be in the mid to possibly low 11's next time.

Aside from the XHP tuning, what else are you tuned with? A jb4? Thanks

I'm currently using JB4 map 2 on 94 octane pump gas. Currently averaging 20psi with peaks of 23psi.

[JonasM40i]

I have to say that my LC works really well without doing anything on xhp.

My 0-60 time is 2.95, so really quick.

I am really excited, how fast it will go, when tuning is finished.

[Gr8ZongB58]

Originally Posted by UpperAustriaM40i

I have to say that my LC works really well without doing anything on xhp.

My 0-60 time is 2.95, so really quick.

I am really excited, how fast it will go, when tuning is finished.

That is quick! What do you got going on so far?

[RICH S202]

Is that 0-60 kmph? Coz you gotta be over 600whp for those figures

[MFschwifty]

Originally Posted by UpperAustriaM40i

I have to say that my LC works really well without doing anything on xhp.

My 0-60 time is 2.95, so really quick.

I am really excited, how fast it will go, when tuning is finished.

Damn, that is quick!

You might be the closest to giving suby01 a run for his money when it comes to the fastest m40i build.

What have you done so far beyond the basic bolt ons?

For now JB4 is the furthest I'm going as I don't want to send out my DME to get unlocked for a proper flash tune, everything else is stock. I assume I'm pushing just above 400whp but who knows. Still plenty quick to have fun spirited cruising around town and on highways.... For now

[JonasM40i]

I have a Turbo Systems Stage 2 Upgrade Turbo and a Dorch DS25-350 Hpfp. Tunes via MHD (Custom Map).

Running on 95 Okt (102Ron).

So no port injection. Consider an intake manifold, but don't know it yet.

I am afraid, that I can't stop modding :-)

[Gr8ZongB58]

Originally Posted by UpperAustriaM40i

I have a Turbo Systems Stage 2 Upgrade Turbo and a Dorch DS25-350 Hpfp. Tunes via MHD (Custom Map).

Running on 95 Okt (102Ron).

So no port injection. Consider an intake manifold, but don't know it yet.

I am afraid, that I can't stop modding :-)

Good stuff! Nice benchmark for a "simpler" setup. That's almost like the route I would take without getting too crazy with fueling and cooling. I would definitely look into a pure trans before I go with a new manifold.

[JonasM40i]

Yes, I already contacted "Kotte Performance" because of a trans upgrade. Think that would made sence. You can find some stuff on youtube from them. They have a lot of knowledge concerning the B58.

[vrships]

What I have learned so far by playing with all XHP settings:

First you do need xhp to evade multiple torque limits if you have BM3 OTS maps. Because factory LC torque limit is at 500nm and torque limit w/o LC is 550nm and BM3 OTS map doesn't touch these.

With XHP, 550nm universal torque limit is instantly gone. From ECU readings the actual torque can reach 670nm with stage 2 and beyond. And w/o XHP it won't go beyond 570nm even if you run stage 2 E50.

The LC running torque is adjusted through. "Torque scaling after launch". For xdrive just make sure this covers all the torque range each gear is enough. My guess it's 500nm×(1+scaling%)

But i couldnt figure out the launch torque. Whatever values I set , even at 0, the stock brakes cannot hold the car still when LC is activated and the car moves forward a bit, then the ecu decreased the boost and timing so it always ended up ~360Nm before the brake is released. But anyway that gives enough initial trust just enough not to spin the wheels and reachs 1.4G maximum

[Dinan_Rated]

Originally Posted by JonasM40i

I have to say that my LC works really well without doing anything on xhp.

My 0-60 time is 2.95, so really quick.

I am really excited, how fast it will go, when tuning is finished.

impressive, we need a nice dragy video run!