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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #26  
Old 01-26-2014, 10:31 PM
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DJ63 DJ63 is offline
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Location: Catahoula Parish
 
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Mein Auto: 2001 540/6 2014 328xdT
So thats what blew my CV and Diff seal, it was the altitude! Now I'm digging it in my Holiday Express room
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  #27  
Old 03-03-2014, 01:39 PM
Bimmerman4ever Bimmerman4ever is offline
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Location: Nevada
 
Join Date: Mar 2009
Posts: 94
Mein Auto: 96 M3 / 99 K1200RS
Interesting read. I live in the high desert (above 4k feet) and my 97 328i has pretty good power at lower speeds (up to 50 mph).

I recently did a trip to the California bay area.
Below 2k feet elevation it felt like it added another 40 HP especially on the crazy freeways down there where 80+ mph speeds are common.
The car pulled hard all the way past the triple digits mph range. I was surprised. Once I got back home I was disappointed to lose so much performance due to the elevation increase.

Is there any work around to have the ECU/DME reprogrammed/mapped for better performance at higher elevations?
Or am I pretty much stuck with the dismal performance because of the thinner air?

From reading, unfortunately the later seems the case


Last edited by Bimmerman4ever; 03-03-2014 at 01:41 PM.
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  #28  
Old 03-03-2014, 03:05 PM
HTK12 HTK12 is online now
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Location: Finland
 
Join Date: Aug 2012
Posts: 725
Mein Auto: E39 540i
Quote:
Originally Posted by Bimmerman4ever View Post
Interesting read. I live in the high desert (above 4k feet) and my 97 328i has pretty good power at lower speeds (up to 50 mph).

I recently did a trip to the California bay area.
Below 2k feet elevation it felt like it added another 40 HP especially on the crazy freeways down there where 80+ mph speeds are common.
The car pulled hard all the way past the triple digits mph range. I was surprised. Once I got back home I was disappointed to lose so much performance due to the elevation increase.

Is there any work around to have the ECU/DME reprogrammed/mapped for better performance at higher elevations?
Or am I pretty much stuck with the dismal performance because of the thinner air?

From reading, unfortunately the later seems the case

You need more oxygen in the engine. The only way would be go to FI.
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  #29  
Old 03-03-2014, 03:11 PM
Bimmerman4ever Bimmerman4ever is offline
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Location: Nevada
 
Join Date: Mar 2009
Posts: 94
Mein Auto: 96 M3 / 99 K1200RS
Quote:
Originally Posted by HTK12 View Post
You need more oxygen in the engine. The only way would be go to FI.
"FI", you mean changing the fuel injector size or something else?
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  #30  
Old 03-03-2014, 03:12 PM
BioGuy BioGuy is offline
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Location: Utah
 
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FI= forced induction; ie- turbo or supercharger.
__________________
2001 540i, slushbox.
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  #31  
Old 03-03-2014, 03:17 PM
Bimmerman4ever Bimmerman4ever is offline
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Location: Nevada
 
Join Date: Mar 2009
Posts: 94
Mein Auto: 96 M3 / 99 K1200RS
Quote:
Originally Posted by BioGuy View Post
FI= forced induction; ie- turbo or supercharger.
OK
Yes I've considered going with a SC. Just have to see what deals are out there.

I'm working on a Porsche 968 for a customer, brakes, HU, dynamat, etc..
when I'm done with it he's getting a SC installed in southern Cal'

It's a 3.0 liter 4 banger with a 6 speed manual
236Hp rated
Not bad the way it is now, but with a SC that would be great
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air metering, altitude, ccv, diagnostic repair, dme, engine management, icv, maf


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