N54 Auto power/torque limit?

snedanator · 08-24-2015, 06:26 AM

Hi im looking to do some upgrades on my E93 335i AT. ie, jb4, fbo, stage 2+ turbos. Im looking to achieve 600-650hp and around 600 torque. What would be a reasonably safe number for the longitivity of the AT, would these numbers be ok or would i be better going for around the 500-550 hp/torque mark.

Antoniogaj · 08-24-2015, 10:22 AM

600wtq is probably too much for the auto trans. I would say keep it around 500-550... I'm at 530wtq right now on stock turbos and haven't had any issues.

Blaster400 · 08-24-2015, 11:09 AM

Quote:

Originally Posted by Antoniogaj

600wtq is probably too much for the auto trans. I would say keep it around 500-550... I'm at 530wtq right now on stock turbos and haven't had any issues.

+1
550 wtq seems to be the limit for stock AT.

135Pats · 08-24-2015, 11:31 AM

Curve depends as much as the peak figure, something worth keeping in mind. The huge amount of torque right off idle that you get with most stock frames is brutal for the transmission. If you can ramp the torque in more gently you raise that ceiling.

I'm @ 640WHP/590WTQ no issues.

snedanator · 08-24-2015, 01:45 PM

Quote:

Originally Posted by 135Pats

Curve depends as much as the peak figure, something worth slightly ightly laterng in mind. The huge amount of torque right off idle that you get with most stock frames is brutal for the transmission. If you can ramp the torque in more gently you raise that ceiling.

I'm @ 640WHP/590WTQ no issues.

Yeah i was thinking along those lines as well... Gradually bringing in the torque slightly later rather than mapping it to bring the torque in all in the one go lower down the rev range.

snedanator · 08-24-2015, 01:51 PM

Quote:

Originally Posted by 135Pats

Curve depends as much as the peak figure, something worth keeping in mind. The huge amount of torque right off idle that you get with most stock frames is brutal for the transmission. If you can ramp the torque in more gently you raise that ceiling.

I'm @ 640WHP/590WTQ no issues.

what turbo set up do you have Pat?

Jnat · 08-24-2015, 06:58 PM

[QUOTE=135Pats;18467282]Curve depends as much as the peak figure, something worth keeping in mind. The huge amount of torque right off idle that you get with most stock frames is brutal for the transmission. If you can ramp the torque in more gently you raise that ceiling.

I'm @ 640WHP/

Well put, ditto!

snedanator · 08-24-2015, 08:36 PM

[QUOTE=Jnat;18470020]

Quote:

Originally Posted by 135Pats

Curve depends as much as the peak figure, something worth keeping in mind. The huge amount of torque right off idle that you get with most stock frames is brutal for the transmission. If you can ramp the torque in more gently you raise that ceiling.

I'm @ 640WHP/

Well put, ditto!

yeah as keeping it as a daily driver not bothered about track/0-60 times ect. Bringing it in nice will do me fine. I think around the 550/600 hp/torque mark will do me with good mapping for longitivity of the Auto box. Cheers bro.

Jnat · 08-24-2015, 08:45 PM

[QUOTE=snedanator;18470518]

Quote:

Originally Posted by Jnat

yeah as keeping it as a daily driver not bothered about track/0-60 times ect. Bringing it in nice will do me fine. I think around the 550/600 hp/torque mark will do me with good mapping for longitivity of the Auto box. Cheers bro.

Cool, again, it's how you apply it, sometimes we forget that, good luck!

snedanator · 08-24-2015, 08:58 PM

[QUOTE=Jnat;18470567]

Quote:

Originally Posted by snedanator

Cool, again, it's how you apply it, sometimes we forget that, good luck!

yeah i know, it can be an expensive forget for greed

135Pats · 08-25-2015, 11:09 AM

Quote:

Originally Posted by snedanator

what turbo set up do you have Pat?

Names' not Pat but my username is confusing I suppose

HTA3586r .82 exhaust

snedanator · 08-25-2015, 11:44 AM

Quote:

Originally Posted by 135Pats

Names' not Pat but my username is confusing I suppose

HTA3586r .82 exhaust

cheers mate..

08-24-2015, 06:26 AM	#1
snedanator Lieutenant 97 Rep 551 Posts Drives: e93 335i le mans blue Join Date: Jul 2015 Location: Falkirk . Scotland iTrader: (0)	N54 Auto power/torque limit? Hi im looking to do some upgrades on my E93 335i AT. ie, jb4, fbo, stage 2+ turbos. Im looking to achieve 600-650hp and around 600 torque. What would be a reasonably safe number for the longitivity of the AT, would these numbers be ok or would i be better going for around the 500-550 hp/torque mark.
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08-24-2015, 10:22 AM	#2
Antoniogaj First Lieutenant 48 Rep 341 Posts Drives: F82 M4 Join Date: Sep 2013 Location: Macomb, Michigan iTrader: (1)	600wtq is probably too much for the auto trans. I would say keep it around 500-550... I'm at 530wtq right now on stock turbos and haven't had any issues.
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08-24-2015, 11:31 AM	#4
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	Curve depends as much as the peak figure, something worth keeping in mind. The huge amount of torque right off idle that you get with most stock frames is brutal for the transmission. If you can ramp the torque in more gently you raise that ceiling. I'm @ 640WHP/590WTQ no issues. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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08-24-2015, 06:58 PM	#7
Jnat DisplacementReplacement 394 Rep 1,090 Posts Drives: 2020 X3M Join Date: Sep 2012 Location: Jersey Shore iTrader: (0)	[QUOTE=135Pats;18467282]Curve depends as much as the peak figure, something worth keeping in mind. The huge amount of torque right off idle that you get with most stock frames is brutal for the transmission. If you can ramp the torque in more gently you raise that ceiling. I'm @ 640WHP/ Well put, ditto!
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