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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Is NLS/2-step worth the upgrade to Rev 3?



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      05-21-2012, 07:33 PM   #1
Chicks-Love-Bimmers
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Is NLS/2-step worth the upgrade to Rev 3?

I'm currently running Rev 2.5 right now and am trying to take my car to the drag strip next month to see how I do in the 1/4 mile. Would NLS/2-step improve my times by a lot or is it not worth it? Would the kind of tires matter when using 2-step? I'm also worried whether or not NLS can be bad for the clutch?
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      05-21-2012, 07:39 PM   #2
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NLS/2-step is bad for turbos, but it def should improve time and youll get more consistent launchs.

IMO, im young and think 2-step is cool. No cats=fireballs. i wouldnt really do it very often, but if you do launch your car often or really drive i think its worth it. i guess its better to have and not use then to not have at all.
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      05-21-2012, 07:40 PM   #3
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Quote:
Originally Posted by Chicks-Love-Bimmers View Post
I'm currently running Rev 2.5 right now and am trying to take my car to the drag strip next month to see how I do in the 1/4 mile. Would NLS/2-step improve my times by a lot or is it not worth it? I'm also worried whether or not NLS can be bad for the clutch?
Unless you have drag radials/slicks, a 2-step is pretty useless in terms of 1/4 performance. With it, you will built enough boost in neutral to light up any street tire uncontrollably.

FWIW, with our single turbo car (which runs hoosier slicks), I use 2-step to build nearly 10psi of boost with a 5500rpm 2-step. With all that boost and tons of mechanical grip, the car pulls a peak of 1.3G during the launch.

If you are running street tires, 2-step is mainly a cool sounding feature. More useful is the NLS feature which allows you to shift quickly, with little loss of boost between gears and with much less transmission stress. That is definitely worth it.

Shiv
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      05-21-2012, 07:43 PM   #4
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Quote:
Originally Posted by shiv@vishnu View Post
Unless you have drag radials/slicks, a 2-step is pretty useless in terms of 1/4 performance. With it, you will built enough boost in neutral to light up any street tire uncontrollably.

FWIW, with our single turbo car (which runs hoosier slicks), I use 2-step to build nearly 10psi of boost with a 5500rpm 2-step. With all that boost and tons of mechanical grip, the car pulls a peak of 1.3G during the launch.

If you are running street tires, 2-step is mainly a cool sounding feature. More useful is the NLS feature which allows you to shift quickly, with little loss of boost between gears and with much less transmission stress. That is definitely worth it.

Shiv
but with x-drive? is there any awd 335i with 2-step? id love to see a launch video!
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      05-21-2012, 07:53 PM   #5
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Quote:
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but with x-drive? is there any awd 335i with 2-step? id love to see a launch video!
I imagine a 6MT xi would benefit from 2-step if the track is well prepped. I've not personally tested it though. The NLS is a bigger benefit for most people in most situations.

Shiv
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      05-21-2012, 07:56 PM   #6
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I think the native Usb and extra input/output channels make the Rev 3 upgrade worth it. I always used to have disconnect issues with the serial to Usb cable, and I tried several different adapters.
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      05-21-2012, 08:11 PM   #7
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it would be nice to see an x-drive launch like a B5 S4 but i dont think our cars could handle it

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      05-21-2012, 09:32 PM   #8
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Shiv,
With NLS, you still have fuel injecting into the cylinders, just no ignition spark. Does that extra fuel burning in the cylinder and in the exhaust cause any harm to the engine, turbos, or exhaust?>?
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      05-21-2012, 10:08 PM   #9
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I have it and never use it.
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      05-22-2012, 08:36 AM   #10
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Quote:
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I have it and never use it.
Nls, 2-step, or neither?
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      05-22-2012, 09:04 AM   #11
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Neither.
I don't drag race for 2step and I feel like NLS takes longer than a normal shift.
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      05-22-2012, 11:02 AM   #12
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Quote:
Originally Posted by skim7x View Post
Shiv,
With NLS, you still have fuel injecting into the cylinders, just no ignition spark. Does that extra fuel burning in the cylinder and in the exhaust cause any harm to the engine, turbos, or exhaust?>?
Fuel is cut along with ignition. So there is no fuel to ignite in the exhaust manifold/dp. There may be a small amount of fuel that sneaks through when ignition is pulsed but it's harmless.
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      05-22-2012, 11:13 AM   #13
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Quote:
Originally Posted by MrRager View Post
it would be nice to see an x-drive launch like a B5 S4 but i dont think our cars could handle it

I'd be curious how many times that guy can do that before something breaks
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      05-22-2012, 11:41 AM   #14
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Quote:
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I'd be curious how many times that guy can do that before something breaks
B5 S4's are known for their ability to launch time and time again without anything breaking. thats one of the good things theyre known for. e90s not so much. my buddy broke a halfshaft on a 328i.
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      05-22-2012, 11:56 AM   #15
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Quote:
Originally Posted by MrRager View Post
B5 S4's are known for their ability to launch time and time again without anything breaking. thats one of the good things theyre known for. e90s not so much. my buddy broke a halfshaft on a 328i.
b5s are never known for general reliability however.

ask me how i know.
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      05-22-2012, 12:10 PM   #16
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:13 of that video looks like a doobie :P
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      05-22-2012, 02:05 PM   #17
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:13 of that video looks like a doobie :P
haha thats what I was thinking...
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      05-22-2012, 03:28 PM   #18
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I upgraded to the rev 3, but haven't installed the 2-step/nls relay yet.

But I have been using the built in USB. That alone has been worth it for me, since I don't have to dig out the ancient laptop or deal with flaky usb-serial converters.
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      05-22-2012, 03:30 PM   #19
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Quote:
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I upgraded to the rev 3, but haven't installed the 2-step/nls relay yet.

But I have been using the built in USB. That alone has been worth it for me, since I don't have to dig out the ancient laptop or deal with flaky usb-serial converters.
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