335D how much TQ is to much TQ

bluephobic(1) · 08-03-2015, 06:44 AM

Hey guys was looking over one of the shop cars and I started thinking....how much TQ is to much TQ This is what our long distance cruiser 335D shop car (Project Polar Bear) just put down...and its 96F here kind of concerned about the trans holing up over long term...

Thecastle · 08-03-2015, 07:11 AM

Looks fun! Though probably very peaky, wonder what EGT's they're seeing.

Without seeing the whole graph, Its hard to say what is actually happening with this dyno run, and if its really bad for the transmission, Can you post the whole graph?

From the little bit you show, the WHP is not terribly high at 324hp, and the torque output is quite high at 621. So I'd infer that its likely there is either a measurement anomaly, or they have a brief torque spike at lowish RPMs due to a tune issue (or on purpose). 324whp, isn't super high for these engines, and can be made well with in the limits of the stock transmission.

The 6hp28/6hp26tu on the 335d is rated at a maximum input torque of 700nm / ~516lbft. My non-expert opinion is that the transmission would be at risk of accelerated wear and premature failure, but doesn't that really depend on how you drive it? If your not flooring it all the time, then its probably gonna last a long time. The extra torque only happens under high throttle conditions which people don't see all the time on the street. If your tracking the car, I'd probably upgrade the tranny for longevity.

DWR · 08-06-2015, 10:12 AM

Quote:

Originally Posted by bluephobic(1)

Hey guys was looking over one of the shop cars and I started thinking....how much TQ is to much TQ This is what our long distance cruiser 335D shop car (Project Polar Bear) just put down...and its 96F here kind of concerned about the trans holing up over long term...

What's the rpm for that level of torque?

Puerto Rican 335d · 08-06-2015, 01:03 PM

I concur w castle if you drive like you stole it everytime you wont last long but if its just the common daily driver and a couple of burst here and there it should last awhile

bluephobic(1) · 08-06-2015, 02:02 PM

Thanks for the imputs guys, this is what we were sent the other day, have yet to see full graphs , as soon as we get them we will post them

08-03-2015, 06:44 AM	#1
bluephobic(1) Inspiring the youth of tommorow... 37 Rep 333 Posts Drives: AllTheTQ's Join Date: Apr 2010 Location: Ashburn VA iTrader: (0) Garage List 2009 135i [0.00]	335D how much TQ is to much TQ Hey guys was looking over one of the shop cars and I started thinking....how much TQ is to much TQ This is what our long distance cruiser 335D shop car (Project Polar Bear) just put down...and its 96F here kind of concerned about the trans holing up over long term... Attached Images __________________ E82 135i Jet Black over coral red E39 Dinan 540i manual Topaz blue over beige F15 X5 35D Mineral white metallic over Mocha Nappa 991.1 911 GT3 Guards red over black alcantara P13 570GT MSO Volcano Red over saddle tan
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08-03-2015, 07:11 AM	#2
Thecastle Major 307 Rep 1,146 Posts Drives: F10 550i Join Date: Apr 2015 Location: Houston, TX iTrader: (0) Garage List 2020 BMW M340i [0.00] 2019 RAM 3500 [0.00] 2020 BMW X3 [0.00] 2016 BMW 550i [0.00] 2000 Ford F450 7.3l ... [0.00]	Looks fun! Though probably very peaky, wonder what EGT's they're seeing. Without seeing the whole graph, Its hard to say what is actually happening with this dyno run, and if its really bad for the transmission, Can you post the whole graph? From the little bit you show, the WHP is not terribly high at 324hp, and the torque output is quite high at 621. So I'd infer that its likely there is either a measurement anomaly, or they have a brief torque spike at lowish RPMs due to a tune issue (or on purpose). 324whp, isn't super high for these engines, and can be made well with in the limits of the stock transmission. The 6hp28/6hp26tu on the 335d is rated at a maximum input torque of 700nm / ~516lbft. My non-expert opinion is that the transmission would be at risk of accelerated wear and premature failure, but doesn't that really depend on how you drive it? If your not flooring it all the time, then its probably gonna last a long time. The extra torque only happens under high throttle conditions which people don't see all the time on the street. If your tracking the car, I'd probably upgrade the tranny for longevity.
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08-06-2015, 01:03 PM	#4
Puerto Rican 335d Brigadier General 229 Rep 3,489 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	I concur w castle if you drive like you stole it everytime you wont last long but if its just the common daily driver and a couple of burst here and there it should last awhile __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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08-06-2015, 02:02 PM	#5
bluephobic(1) Inspiring the youth of tommorow... 37 Rep 333 Posts Drives: AllTheTQ's Join Date: Apr 2010 Location: Ashburn VA iTrader: (0) Garage List 2009 135i [0.00]	Thanks for the imputs guys, this is what we were sent the other day, have yet to see full graphs , as soon as we get them we will post them __________________ E82 135i Jet Black over coral red E39 Dinan 540i manual Topaz blue over beige F15 X5 35D Mineral white metallic over Mocha Nappa 991.1 911 GT3 Guards red over black alcantara P13 570GT MSO Volcano Red over saddle tan
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