What RPM to launch stock 335 Xdrive? - BMW 3-Series (E90 E92) Forum

BCeagle08 · 03-20-2013, 09:19 AM

I just picked up a 335i xDrive, 6MT

What rpm should I be launching this car at? I launched at 4k the other day and I still didn't get any wheel spin! I'm afraid to try any higher, I feel like I will rip the drivetrain apart

I am coming from a Mustang GT, and I feel my technique is pretty solid. I"m just curious as to what RPMs people are launching their 6MT xDrives.

Also, I'm curious as to whether this drivetrain can withstand a strong launch (not drag radials or anything crazy like that).

chillbil79 · 03-20-2013, 02:56 PM

I launch at 20mph roll

CT335xi · 03-20-2013, 04:51 PM

I'm sure you can launch it a bit higher but I would advise doing it a lot , I don't think the clutch will hold up not to mention the other drivetrain parts.

BCeagle08 · 03-25-2013, 02:15 PM

Bump - anyone else have experience with drivetrain durability under launch? I don't plan on doing it often, if ever, but I want to know if the BMW is particularly weak when it comes to the durability of the AWD drivetrain.

jcy335xi · 03-25-2013, 03:50 PM

Have you try pre-loading the drivetrain (e-brake) prior to the launch? If you do properly, it takes away so much of the initial shock to the t-case/ trans. It also allows you to launch at a higher rpm.

I did this in my evo anytime I was launching, and from 6k, I never had any issues.

Carl Morris · 03-28-2013, 10:31 PM

I'm at high elevation which makes everything a bit laggier, so I may have to be a bit more aggressive than you. But I found that flooring it at the first yellow and dropping it on the 3rd yellow worked nicely at the dragstrip. That way you have a full second at WOT and are very close to 5000rpm when the clutch drops. That was enough to avoid bogging under my conditions. The first couple of trips to the track doing that I spun the tires a bit and it was perfect. By the end of the season the track had gotten stickier and my stock clutch had gotten weaker and my clutch stopped hooking up. So I'm done at the track until I get a better clutch.

03-20-2013, 09:19 AM	#1
BCeagle08 Private First Class Drives: 2009 E92 xDrive 6MT Join Date: Mar 2013 Location: Long Island, NY Posts: 118 iTrader: (0)	What RPM to launch stock 335 Xdrive? I just picked up a 335i xDrive, 6MT What rpm should I be launching this car at? I launched at 4k the other day and I still didn't get any wheel spin! I'm afraid to try any higher, I feel like I will rip the drivetrain apart I am coming from a Mustang GT, and I feel my technique is pretty solid. I"m just curious as to what RPMs people are launching their 6MT xDrives. Also, I'm curious as to whether this drivetrain can withstand a strong launch (not drag radials or anything crazy like that).
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03-20-2013, 04:51 PM	#3
CT335xi Private First Class Drives: e90 335xi, evo 8, gmc syclone Join Date: Dec 2011 Location: Naugatuck,Ct Posts: 163 iTrader: (0)	I'm sure you can launch it a bit higher but I would advise doing it a lot , I don't think the clutch will hold up not to mention the other drivetrain parts. __________________ volk re30 18x8.5 / tc kline coilovers / cobb ap / afe stg 2 sealed cai / afe air scoops / 5" ets fmic

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03-20-2013, 02:56 PM	#2
chillbil79 New Member Drives: 08 335xi Sedan Join Date: Jul 2012 Location: Delaware Posts: 27 iTrader: (0)	I launch at 20mph roll

03-25-2013, 02:15 PM	#4
BCeagle08 Private First Class Drives: 2009 E92 xDrive 6MT Join Date: Mar 2013 Location: Long Island, NY Posts: 118 iTrader: (0)	Bump - anyone else have experience with drivetrain durability under launch? I don't plan on doing it often, if ever, but I want to know if the BMW is particularly weak when it comes to the durability of the AWD drivetrain.

03-25-2013, 03:50 PM	#5
jcy335xi Private First Class Drives: 2008 335xi Coupe Join Date: Feb 2013 Location: Seattle Posts: 108 iTrader: (0)	Have you try pre-loading the drivetrain (e-brake) prior to the launch? If you do properly, it takes away so much of the initial shock to the t-case/ trans. It also allows you to launch at a higher rpm. I did this in my evo anytime I was launching, and from 6k, I never had any issues.

03-28-2013, 10:31 PM	#6
Carl Morris Lieutenant Drives: 2008 335xi 6MT Join Date: Feb 2012 Location: Boulder, CO Posts: 551 iTrader: (0)	I'm at high elevation which makes everything a bit laggier, so I may have to be a bit more aggressive than you. But I found that flooring it at the first yellow and dropping it on the 3rd yellow worked nicely at the dragstrip. That way you have a full second at WOT and are very close to 5000rpm when the clutch drops. That was enough to avoid bogging under my conditions. The first couple of trips to the track doing that I spun the tires a bit and it was perfect. By the end of the season the track had gotten stickier and my stock clutch had gotten weaker and my clutch stopped hooking up. So I'm done at the track until I get a better clutch.