R56 Popping and gurgle exhaust???

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Feb 12, 2015 | 10:37 AM

#26

Grizld700

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From: E. Iowa

They actually switched mid 2012 and some '12 JCW models do infact have the N18

Feb 12, 2015 | 10:45 AM

#27

Ghetto Mr Bob

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Aha. Never knew that! I'll crawl back under my rock now.

Feb 12, 2015 | 01:06 PM

#28

The Patagonian

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From: Hampshire UK

Quote:

Originally Posted by Ghetto Mr Bob

It pops/gurgles in sport mode because sport mode dumps a little fuel directly into the exhaust when it normally doesn't while not in sport mode.

On a side note, I've noticed the pops only happen after having driven the car for a certain distance. For example, if I only make a 2-3 mile commute in sport mode, no pops....if I stretch that to a few miles more, pops/gurgles all over the place.

That makes sense so it does change the map.

Agree about the distance but i suspect it's actually temp that triggers it, I need 5 or 6 miles on the clock before anything happens.

Feb 12, 2015 | 01:24 PM

#29

AndyPWR53

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Fuel won't detonate unless the header/manifold/downpipe is hot.

Feb 12, 2015 | 02:07 PM

#30

Ovrclck

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From: Seal Beach, CA

Quote:

Originally Posted by AndyPWR53

Fuel won't detonate unless the header/manifold/downpipe is hot.

Correct, once my temp gauge hits 90c, pops start.

Sent from cellular device.

Feb 12, 2015 | 02:24 PM

#31

The Patagonian

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From: Hampshire UK

Yep agree with that, I need about 190f on the Scangauge before anything happens.

Feb 12, 2015 | 06:57 PM

#32

minivinnie92

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Joined: Jun 2012

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From: Jersey

I have to hit about 176-180f

Feb 12, 2015 | 10:05 PM

#33

gchin

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From: Elk Grove, CA

I'm really enjoying reading all the comments about the MCS quirkiness!

It is pure driving pleasure, too.

Feb 13, 2015 | 12:31 AM

#34

rigga

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From: Birmingham UK

My 2010 N14 jcw pops and bangs a lot, and as said only does it when its up to temperature, as there is no gauge fitted I use that as a sign the car is now ok to use properly, I was under the impression N18 engines only pop in sport mode which seems a bit of a backwards step, but not as much as the years they stoped doing it at all.

Feb 14, 2015 | 07:12 AM

#35

Agbullet25

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From: Austin, TX

So what makes the JCWs pop over the MCS with the same engine? Is it a different downpipe or is it the different cat back section of the exhaust? Or is it simply the engine mapping is different?

Feb 14, 2015 | 09:23 AM

#36

rigga

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From: Birmingham UK

Don't think the downpipe is different on the jcw to the cooper s, so its possibly exhaust (especially the rear silencer) I would think as I gather mapping is the same?

Feb 14, 2015 | 09:33 AM

#37

minivinnie92

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From: Jersey

I doubt mapping is the same with a different turbo and exhaust and much more I'm sure it's programmed into the computer

Feb 14, 2015 | 09:34 AM

#38

Agbullet25

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From: Austin, TX

Quote:

Originally Posted by rigga

Don't think the downpipe is different on the jcw to the cooper s, so its possibly exhaust (especially the rear silencer) I would think as I gather mapping is the same?

I think mapping is a little different because there is an ECU remap needed when you get the factory tuning kit.

Feb 14, 2015 | 09:57 AM

#39

rigga

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From: Birmingham UK

Probably right concerning the jcw mapping as there is a different Turbo,, I know the jcw rear silencer makes a big difference to the sound when fitted to Cooper s models though.