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  #31  
Old 20-08-2014, 10:06 PM
Freddy Freddy is offline
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Here in Norway the headers are different, the catalyst is in the headers. The E46 M3's sold here does not have catalysts in the headers.


The DME is also different. And if someone happen to have a stock Z3M 325bhp DME and want to upgrade to E46 M3 343bhp I am very interested!
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  #32  
Old 21-08-2014, 07:23 AM
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inkey$ inkey$ is offline
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Thanks
Taken in week one of ownership. I must have spend 80% of that week driving and smiling!
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  #33  
Old 21-08-2014, 11:18 AM
siwilson siwilson is offline
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Quote:
Originally Posted by Freddy View Post
Here in Norway the headers are different, the catalyst is in the headers. The E46 M3's sold here does not have catalysts in the headers.
US E46 M3 and Z3M models also have the cats in the headers causing a 10 BHP loss for both models. This is one reason why Euro style headers are a popular mod over there.

I think the power difference is really down to several factors. Different intake and exhaust systems, lower redline and DME programming. I am also sure BMW were keen to put some distance between Z3M and M3 version for marketing purposes. A bit line Porsche do with the Boxster, Caymen and 911.

There is a project underway in the US to reprogram the DME and get this power back as well as enable the sport mode in the proper way. Thread here

Si.
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  #34  
Old 21-08-2014, 06:05 PM
Pauljparkinson Pauljparkinson is offline
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Quote:
Originally Posted by sk8flex View Post
There is no downgraded exhaust.
Is there not???
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  #35  
Old 21-08-2014, 07:08 PM
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sk8flex sk8flex is offline
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Quote:
Originally Posted by Freddy View Post
Here in Norway the headers are different, the catalyst is in the headers.
Why should there be a special version for Norway? Other emission regulations?

@Paul: The headers for E46 M3 and Z3M S54 share the same part numbers.
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  #36  
Old 22-08-2014, 12:14 AM
paulwirral paulwirral is offline
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I think it's something to do with cold start up emissions in some countries , could be bollocks but audi do the same , first thing to do with an s4 twin turbo is cut the pre cats out .
Or at least that's what the interweb said
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  #37  
Old 23-08-2014, 11:49 PM
coupe fan coupe fan is offline
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Get your S54 remapped. Last one I had done 2(?) years ago took it up to 348bhp and they reckoned that, once the reprograming had settled in, it would rise to about 354. And, yes, they did deactivate the rev limiter/speed limiter but I don't think that would affect the bhp.

Made a big difference to the everyday 'pushing it' performance.
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  #38  
Old 24-08-2014, 08:01 AM
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exdos exdos is offline
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Quote:
Originally Posted by coupe fan View Post
And, yes, they did deactivate the rev limiter/speed limiter but I don't think that would affect the bhp.
As I posted earlier, the formula for calculating Horsepower is:

HP = (RPM * Torque in ft/ lbs) / 5252
Therefore if the engine can rev to 8,000rpm, without a big drop off in torque, it will give a higher bhp figure.
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  #39  
Old 24-08-2014, 08:34 AM
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ragerover ragerover is offline
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Quote:
Originally Posted by coupe fan View Post
Get your S54 remapped. Last one I had done 2(?) years ago took it up to 348bhp and they reckoned that, once the reprograming had settled in, it would rise to about 354. And, yes, they did deactivate the rev limiter/speed limiter but I don't think that would affect the bhp.

Made a big difference to the everyday 'pushing it' performance.
Can do a good deal on both S54 and S50 remaps

Group buy any one
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  #40  
Old 24-08-2014, 03:45 PM
mnbrennan mnbrennan is offline
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What are the gains on the s50 and what is the cost?
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