[WrxToBeamerGuy]

I'm AWD and pushing 400hp 500trq at the wheels and I'm too scared to launch it but I really want to....

[robsciam]

iam in the same boat as you

[Honeybadger23]

Originally Posted by WrxToBeamerGuy

I'm AWD and pushing 400hp 500trq at the wheels and I'm too scared to launch it but I really want to....

I just did bm3 stage 2 with catless DP
when i launch it in sport +
the traction control kicks in
if I turn off DSC IN COMFORT MODE.
when I launch you really feel the power, back end breaks loose.

2016 340i msport 49k Miles
bm3 stage 2
Catless DP
tires
275 40 19 rear
245 40 19 front

[WrxToBeamerGuy]

Originally Posted by Honeybadger23

I just did bm3 stage 2 with catless DP
when i launch it in sport +
the traction control kicks in
if I turn off DSC IN COMFORT MODE.
when I launch you really feel the power, back end breaks loose.

2016 340i msport 49k Miles
bm3 stage 2
Catless DP
tires
275 40 19 rear
245 40 19 front

You're not AWD so your power lets the tires spin which probably helps a lot.

[njdangelo]

Originally Posted by Honeybadger23

I just did bm3 stage 2 with catless DP
when i launch it in sport +
the traction control kicks in
if I turn off DSC IN COMFORT MODE.
when I launch you really feel the power, back end breaks loose.

2016 340i msport 49k Miles
bm3 stage 2
Catless DP
tires
275 40 19 rear
245 40 19 front

You changed the tire width on the staggered setup to go larger all around? Any benefit to doing that? I feel like it would still give you the same understeer but just more rotational mass which would decrease performance. If it's traction you're going for could you have just increased wheel width at the rear? I'm thinking of ditching my staggered setup all together

[vektorprime]

I have the 440xi 2018 with BM3 stage 2 93 and sometimes stage 2+. If you don't feel like your car can take a launch, then what's the point of having the tune/power? I go WOT at least every other day. Often, I launch from a red light. Even logging in 4th gear at low RPM puts a HUGE load on your engine. Just enjoy the car, and if you don't feel like you can, then lower your tune.

[njdangelo]

Originally Posted by vektorprime

I have the 440xi 2018 with BM3 stage 2 93 and sometimes stage 2+. If you don't feel like your car can take a launch, then what's the point of having the tune/power? I go WOT at least every other day. Often, I launch from a red light. Even logging in 4th gear at low RPM puts a HUGE load on your engine. Just enjoy the car, and if you don't feel like you can, then lower your tune.

I think he is referring to using the launch control feature which is nowhere the same forces as a 4th gear pull or WOT. He's specifically wondering about the drivetrain, not the engine.

I'm in the same boat as him… refuse to use LC. Can't imagine it being mind blowingly faster than a normal take off and don't want to put that stress on my transmission.

But I do still wonder about my original question, why go wider on all four corners if not symmetrical? Especially with AWD. The extra weight decreases performance

[WrxToBeamerGuy]

Originally Posted by njdangelo

I think he is referring to using the launch control feature which is nowhere the same forces as a 4th gear pull or WOT. He's specifically wondering about the drivetrain, not the engine.

I'm in the same boat as him… refuse to use LC. Can't imagine it being mind blowingly faster than a normal take off and don't want to put that stress on my transmission.

But I do still wonder about my original question, why go wider on all four corners if not symmetrical? Especially with AWD. The extra weight decreases performance

Yeah you nailed it. I'll go to 2k RPM and then WOT instead of getting the car squatted down with LC. Which I have done at 350-360hp and it was amazing.

[Hein Jockins]

If we're talking about use the launch control mode, I'm just curious if there's actually any benefit. In theory it sounds great to spool turbos up before you launch, but I cannot tell a difference between launch control mode (w/ the checkered flag symbol) and just me launching it. Anyone know more than me about this?

[about94ninjas]

Originally Posted by Hein Jockins

If we're talking about use the launch control mode, I'm just curious if there's actually any benefit. In theory it sounds great to spool turbos up before you launch, but I cannot tell a difference between launch control mode (w/ the checkered flag symbol) and just me launching it. Anyone know more than me about this?

Launch control just helps manage wheel spin after launching

[eluded]

Don't break an axle

[psipwrd]

Originally Posted by about94ninjas

Launch control just helps manage wheel spin after launching

My launch control doesn't seem to do that. I managed 12.5@117 just going from brake to gas. With launch control, 12.7@115-116, both MHD Stg2 93. E30 spins a lot more (13.0/13.3@108) so I'm looking for stickier tires.

I'm on old Falken FK510, 285/30/19, OEM 437M...
looking at BFGoodrich G-Force Rival S 1.5 275/35/19 to also correct the speedo

[G.Newt]

Your axles and driveshaft will thank you for not launching. I'm 6-speed and xDrive, but launches are out of the question for me.

[Skyhigh]

I have launched probably about 20 times total so far. The reason has in at least 18 of those to do a 0-100 measurement as a validation of changes made to the vehicle. I am looking at improving the 0-100 as an indication for improved performance.

Whilst I agree that all launches are stressing the components, it is important to remember that using Launch Control is the safest way to launch as it has built-in protection per design. I always use it, otherwise also the variables in the launch phase increase.

[psipwrd]

I don't think LC would be offered if some form of protection wasn't built in. That said, braking and gassing together feels violent so I've only done it about 4x. I wanted to confirm in different conditions...the tire spin was worse, and slower on the dragy.

[Belong]

Originally Posted by about94ninjas

Launch control just helps manage wheel spin after launching

WELL NO SHIT SHERLOCk!!!!

[Wires]

Originally Posted by psipwrd

I don't think LC would be offered if some form of protection wasn't built in. That said, braking and gassing together feels violent so I've only done it about 4x. I wanted to confirm in different conditions...the tire spin was worse, and slower on the dragy.

There is a boat load of disclaimers in the user manual around using it. It's brutally hard on your torque converter and transmission fluid temperature since you are leaving the converter in a stalled state under load.

In the "old in days" doing a "brake torque" which is the same thing would result in your torque converter ballooning and destroying it.

LC on a DCT sure, on an auto, it's just bad news, regardless if offered from the factory. My 2-cents worth...

[Glemm1970]

NO Launch start 2 gear 0-100 2,8s
Launch start 1 gear 0-100 2,95s
HP50 X-Drive

[Wires]

Originally Posted by Glemm1970

NO Launch start 2 gear 0-100 2,8s
Launch start 1 gear 0-100 2,95s
HP50 X-Drive

What's your technique for launching in 2nd? It's always been said that 2nd has fastest launch (which you confirmed).

I have noticed the best launches in 1st have always been on the stoplight on a hill on the way home (no launch control, just quick pedal mash). Now I need to try second.

[Glemm1970]

Originally Posted by Wires

What's your technique for launching in 2nd? It's always been said that 2nd has fastest launch (which you confirmed).

I have noticed the best launches in 1st have always been on the stoplight on a hill on the way home (no launch control, just quick pedal mash). Now I need to try second.

DSC Off, 2nd gear. The gas pedal to the floor, release the brake at 2800rpm and go.

[Info@mad-us.com]

Draggy 0-60 time

[psipwrd]

Originally Posted by Glemm1970

NO Launch start 2 gear 0-100 2,8s
Launch start 1 gear 0-100 2,95s
HP50 X-Drive

x̶H̶P̶ m̶e̶a̶n̶s̶ a̶u̶t̶o̶?̶ H̶o̶w̶ d̶o̶ y̶o̶u̶ l̶a̶u̶n̶c̶h̶ i̶n̶ 2̶n̶d̶?̶

Got it!