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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 > Claiming the Worlds SLOWEST 335 (NA mode tested)



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      10-28-2010, 02:54 PM   #1
forza1976
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Claiming the Worlds SLOWEST 335 (NA mode tested)

Elevation 5280
Weight ~3900lbs with driver (xi)

Pretty damn comical/cool. It's definitely louder and you can get the first sense when you switch to Map 3 as it gets a deeper tone even at idle.

Give this log a look

Last edited by forza1976; 05-12-2011 at 11:56 PM.. Reason: removed pics to gain storage
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      10-28-2010, 03:00 PM   #2
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Has the NA mode been dyno'd yet?
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      10-28-2010, 03:00 PM   #3
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So is map 3 the NA map?
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      10-28-2010, 03:04 PM   #4
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Originally Posted by joshuo View Post


Has the NA mode been dyno'd yet?
Not sure

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Originally Posted by jfawns76 View Post
So is map 3 the NA map?
That's correct. I believe Map 4 will be used for the other mods folks have.
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      10-28-2010, 03:07 PM   #5
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So how does driving with NA mode on feel?
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      10-28-2010, 03:07 PM   #6
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So how does driving with NA mode on feel?
SLOW AS SHIT
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      10-28-2010, 03:14 PM   #7
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SLOW AS SHIT
Haha...but perfect for my daily 15-20 mph commute!
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      10-28-2010, 03:14 PM   #8
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My wife owns a hybrid, no way in hell it's slower than that
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      10-28-2010, 03:20 PM   #9
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Can you give us any initial MPG figures?
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      10-28-2010, 03:39 PM   #10
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i'm really interested in seeing what the mpg will look like
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      10-28-2010, 03:57 PM   #11
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Nice. If I were you I'd watch out for those 2 huge boost spikes up to -1 psi
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      10-28-2010, 04:02 PM   #12
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Quote:
Originally Posted by joshuo View Post


Has the NA mode been dyno'd yet?
Nope. I'll do that soon but other things are more pressing right now. I'm guessing it would put down around 160-170whp at sea level. And 25% less power where the OP is. 125whp in the OP's 3900lb car is a power-to-weight ratio of 31lbs per whp. I can't really think of much worse than that. Prius maybe?
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      10-28-2010, 04:04 PM   #13
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Very, very cool stuff!

Also interested in whether this really makes a measurable difference in fuel economy or not - and what it sounds like!

I assume though that there's no way to bounce back and forth w/o losing adaptations? Given that no one ever seems to want to answer the "can we map switch w/o reset question" I'm guessing that's the case?
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      10-28-2010, 04:07 PM   #14
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You should call it the "HPFP Map"

In all seriousness, this sounds great - especially if it makes a noticeable difference in mpg. That said, I'm guessing it won't as when you're on that map the gas pedal will probably be 3/4 down most of the time. Makes for a great valet mode though, for sure!
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      10-28-2010, 04:08 PM   #15
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Quote:
Originally Posted by chumley View Post
Very, very cool stuff!

Also interested in whether this really makes a measurable difference in fuel economy or not - and what it sounds like!

I assume though that there's no way to bounce back and forth w/o losing adaptations? Given that no one ever seems to want to answer the "can we map switch w/o reset question" I'm guessing that's the case?
The DME is always adapting. So when you run in NA mode, it will adapt accordingly. So when you go back to performance mode, autotuning will reset and start over again. This is desireable. And absolutely the best way to do things. Especially if you keep your initial starting boost and IC values close to what you see when autotuned. The idea of retaining autotuning values after mapswitching is flawed because the DME's adaptions have changed from running a different map (assuming it is a different map of course).

Shiv
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      10-28-2010, 04:29 PM   #16
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^ This is the drawback of a piggyback. I think a lot of people who don't do the research, or who don't own one assume that these "maps" are similar to having an AEM standalone with separate "maps."

It's not.

When you switch back and forth, you don't get a new "map," you get new adaptations on the current DME's adjustments. If you're using the NA map where you're running very little boost and lots of timing, you wouldn't want to switch to your high boost map without the computer learning it needs to back the timing off first.
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      10-28-2010, 04:35 PM   #17
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Originally Posted by boostd92 View Post
^ This is the drawback of a piggyback. I think a lot of people who don't do the research, or who don't own one assume that these "maps" are similar to having an AEM standalone with separate "maps."

It's not.

When you switch back and forth, you don't get a new "map," you get new adaptations on the current DME's adjustments. If you're using the NA map where you're running very little boost and lots of timing, you wouldn't want to switch to your high boost map without the computer learning it needs to back the timing off first.
Pretty insignificant drawback for someone willing to drive the car normally for a little bit and let the computer do WHAT IT DOES NATRUALLY... I mean if you are someone who goes from NA mode and start rippin on your car, I mean golly...
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      10-28-2010, 04:50 PM   #18
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You should drive it like that for abot a tank or so and see what kind of mileage you are getting.
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      10-28-2010, 04:56 PM   #19
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Quote:
Originally Posted by boostd92 View Post
^ This is the drawback of a piggyback. I think a lot of people who don't do the research, or who don't own one assume that these "maps" are similar to having an AEM standalone with separate "maps."

It's not.

When you switch back and forth, you don't get a new "map," you get new adaptations on the current DME's adjustments. If you're using the NA map where you're running very little boost and lots of timing, you wouldn't want to switch to your high boost map without the computer learning it needs to back the timing off first.
No. A standalone doesn't self autotune. So, at it's worst (right after a mapswitch when autotune values are reset), it is like a standalone ecu is at it's best. For a few seconds, that is, at which point it will start autotuning.
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      10-28-2010, 05:02 PM   #20
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Quote:
Originally Posted by klipseracer View Post
Pretty insignificant drawback for someone willing to drive the car normally for a little bit and let the computer do WHAT IT DOES NATRUALLY... I mean if you are someone who goes from NA mode and start rippin on your car, I mean golly...
Well, there are a significant amount of people who would like to use the NA mode for their commute to save gas, but if the highway is open, and someone wants to run you, it'd be nice to be able to switch maps on the fly and have full power. Not so convenient to yell out your window at highway speeds trying to explain that you need to make 3-4 pulls first before you're ready to race.

It's a small price to pay though, for the kind of functionality the Vishnu guys are providing. If you had a Honda and bought an AEM computer and paid a tuner to give you 2 to 3 separate tunes to have on file, you'd be near $3,000 in some cases.
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      10-28-2010, 05:02 PM   #21
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This is the mode for valet parking and for picking up your parents at the airport
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      10-28-2010, 05:03 PM   #22
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curious about MPG as well.
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