How much power can stock driveline handle?

Sauer · 02-28-2012, 02:13 PM

Just got my 335i last week and I can't wait to drive it any chance I get. Of course, I'm already looking at getting a tune. How much hp/tq is the stock driveline usually good for before problems can be expected? Searched all morning and couldn't find the answer. I see tons of guys here are running 100 hp and tq over stock for 30,000+ miles. Right now, I just want to get a stage 2+ tune, but I know once you start upping the power, you always want more

GmoBmw · 02-28-2012, 02:14 PM

Atleast 627hp.

JStang · 02-28-2012, 02:30 PM

Quote:

Originally Posted by GmoBmw

Atleast 627hp.

I would say that you're jumping the gun a bit early since there have been limited miles put on the drive train with the single turbo kit.

GmoBmw · 02-28-2012, 03:27 PM

Quote:

Originally Posted by JStang

I would say that you're jumping the gun a bit early since there have been limited miles put on the drive train with the single turbo kit.

Im Pretty sure it can handle it for quite a while. As long as its maintenance well.

OpenFlash · 02-28-2012, 03:32 PM

Quote:

Originally Posted by JStang

Quote:

Originally Posted by GmoBmw

Atleast 627hp.

I would say that you're jumping the gun a bit early since there have been limited miles put on the drive train with the single turbo kit.

The car has been run harder in the last 1500 miles than what most would consider reasonable. And it has 83k miles on the clock. All hard miles. I have a lot of faith in the drivetrain.

ATP · 02-28-2012, 03:53 PM

Quote:

Originally Posted by GmoBmw

Atleast 627hp.

Quote:

Originally Posted by JStang

I would say that you're jumping the gun a bit early since there have been limited miles put on the drive train with the single turbo kit.

This. Especially since I don't believe they have done any solid launches with super sticky tires. They ran well in the standing mile and DDing the car but I am curious to see the axles upon launching the thing at the 1/4 mile.

Shiv is also running an upgraded clutch, so thats one point in the DT that you know you have to upgrade at some point.

On the flip side, its not HP that breaks stuff, its TQ. Someone making 627hp and 450ft-lbs will have a longer living DT than someone with 600/600.

OpenFlash · 02-28-2012, 03:56 PM

I think all bets are off when one is talking about launching with warmed up drag racing slicks. Stock turbo cars have been known to break axles. But short of that, I don't think drivetrain longevity should be a concern up to 500lb-ft of torque. At the current 470-480lbft, driveline shock is less than it was with the stock turbos making a 500+lbft torque spike in the 3500-4000rpm range.

Velocity26 · 02-28-2012, 04:10 PM

IMO, the failures happen with the high RPM stick launches and Auto 3k power-brakes, more than doing roll-ons with 450+hp.

Infamous · 02-28-2012, 04:19 PM

Quote:

Originally Posted by Velocity26

IMO, the failures happen with the high RPM stick launches and Auto 3k power-brakes, more than doing roll-ons with 450+hp.

yep. bmw's are not intended to be drag cars. get a mustang

ATP · 02-28-2012, 04:30 PM

Quote:

Originally Posted by shiv@vishnu

I think all bets are off when one is talking about launching with warmed up drag racing slicks. Stock turbo cars have been known to break axles. But short of that, I don't think drivetrain longevity should be a concern up to 500lb-ft of torque. At the current 470-480lbft, driveline shock is less than it was with the stock turbos making a 500+lbft torque spike in the 3500-4000rpm range.

Agreed but 500 ft-lbs isn't ALOT once you are already rolling, overall stress wise at least. If all you do is roll race, then I certainly wouldn't expect much of an issue with the stock driveline (other than the clutch) at the numbers anyone is putting down today.

JStang · 02-28-2012, 08:43 PM

Quote:

Originally Posted by shiv@vishnu

The car has been run harder in the last 1500 miles than what most would consider reasonable. And it has 83k miles on the clock. All hard miles. I have a lot of faith in the drivetrain.

I'm not doubting it but I wouldn't go popping off with numbers so soon.

GeorgiaTech335coupe · 02-28-2012, 10:38 PM

I broke my driveshaft at the CV where it goes into the diff. FBO+meth w/upgraded clutch so I'm making a lot of torque down low. The hundreds of drag strip launches might have had something to do with it as well.

Sauer · 02-29-2012, 01:03 PM

So really there is no major concern with reliabilty/longevity when it comes to running a tune with supporting mods like a FMIC and DPs. I only asked because on my Jeep SRT8, the tranny is only good for about 500 at the wheels and the stock engine internals don't normally handle much boost before going boom. Thanks for the info.

02-28-2012, 02:13 PM	#1
Sauer Enlisted Member 8 Rep 43 Posts Drives: Jeep SRT8/2008 E90 335i Join Date: Jan 2012 Location: Columbia, SC iTrader: (1)	How much power can stock driveline handle? Just got my 335i last week and I can't wait to drive it any chance I get. Of course, I'm already looking at getting a tune. How much hp/tq is the stock driveline usually good for before problems can be expected? Searched all morning and couldn't find the answer. I see tons of guys here are running 100 hp and tq over stock for 30,000+ miles. Right now, I just want to get a stage 2+ tune, but I know once you start upping the power, you always want more
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02-28-2012, 02:14 PM	#2
GmoBmw Captain 34 Rep 645 Posts Drives: 2007 335i Join Date: Dec 2011 Location: California iTrader: (8)	Atleast 627hp. __________________ 2007 BMW 335I- JB4 G5,DCI,VRSF DPs,NT555r Drag Radials Daily Driver
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02-28-2012, 03:56 PM	#7
OpenFlash 1849 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	I think all bets are off when one is talking about launching with warmed up drag racing slicks. Stock turbo cars have been known to break axles. But short of that, I don't think drivetrain longevity should be a concern up to 500lb-ft of torque. At the current 470-480lbft, driveline shock is less than it was with the stock turbos making a 500+lbft torque spike in the 3500-4000rpm range.
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02-28-2012, 04:10 PM	#8
Velocity26 Resident old fart 146 Rep 575 Posts Drives: 2010 335i M-Sport Join Date: Oct 2011 Location: Florida iTrader: (4)	IMO, the failures happen with the high RPM stick launches and Auto 3k power-brakes, more than doing roll-ons with 450+hp.
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02-28-2012, 10:38 PM	#12
GeorgiaTech335coupe Lieutenant Colonel 86 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	I broke my driveshaft at the CV where it goes into the diff. FBO+meth w/upgraded clutch so I'm making a lot of torque down low. The hundreds of drag strip launches might have had something to do with it as well. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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02-29-2012, 01:03 PM	#13
Sauer Enlisted Member 8 Rep 43 Posts Drives: Jeep SRT8/2008 E90 335i Join Date: Jan 2012 Location: Columbia, SC iTrader: (1)	So really there is no major concern with reliabilty/longevity when it comes to running a tune with supporting mods like a FMIC and DPs. I only asked because on my Jeep SRT8, the tranny is only good for about 500 at the wheels and the stock engine internals don't normally handle much boost before going boom. Thanks for the info.
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