Hi guys,

Although ive been around minis alot over the years and driven a few here or there at track days, auto x events, etc i am new to ownership (my wife just purchased one) and was just looking for some general information. I did try searching the forum and google for this but were unable to find solid facts. So my question to you is what exactly is the difference between the 2013 mcs and jcw engines?? I believe they both now use the N18 engines? Same turbo now or is the jcw still a better unit? Im looking to just get a base feel for things as I believe she will be wanting to modify the car soon lol

thanks for your time!

 

Correct both now run the n18 engine

The jcw turbo is slightly larger, and has a factory "tune" which is how it has the increase in horsepower. Also I believe the s motor uses 10.5:1 CR pistons while the JCW uses 9:5:1 CR pistons

 

Hmmm I looked around on the internet and It looked like they had the same compression ratio as far as I could tell. I figured that it had at least had a different filter, exhaust, tune....does anyone have any more detailed info?? turbo differences?? Engine Internals??

 

I believe the jcw has a lower compression ratio ecause it runs more boost but I could be wrong
Also yes it has a cone type intake as opposed to the s panel intake, however it is still enclosed inside the air box not open in the engine bay
The exhaust is also different, as is the tune which I put in my first post
Turbo difference is size, jcw being slightly larger than the s with larger wheels

 

Also, doesn't the JCW have a different manual tranny?

 

Are the compression ratios different? I thought they were the same after the switch to the n18 engine.

The JCW also has reinforced pistons and thicker cylinder walls as well as an upgraded clutch if you get the manual. It also has a different exhaust header and freer flowing muffler.

 

NJ- Where are you getting your info from? I would love to read up on this.

 

It is possible tey switched for the n18, I have a 2010 s with the n14 so I don't read up much on the n18 haha

 

Sure. As I mentioned, I have not read up on compression ratio for the N18, but everything I have found seems to indicate the same figure.

Here is some items from MINIusa's website on the reinforced clutch: http://www.miniusa.com/#/jcw/JOHN_COOPER_WORKS-m

Some more on Engine mods from Winding Road: http://www.windingroad.com/articles/...e-aftermarket/

Motoringfile's rundown of the history of the JCW Tuning Kit and Engine Mods: http://www.motoringfile.com/2012/05/07/24014/

Article on engine mods: http://www.pistonheads.com/subsite/minijcw/specs.asp

Enjoy!

 

From the mini website, the JCW has 10:1 CR while the s has 10.5:1. This is for a 2013 model

 

Thanks for looking into that. I wasn't sure on that one, so I appreciate the info. It makes sense given the higher boost and turbo differences.

 

Yeah I was curious to see if it changed so I looked haha and there it was on the first page I checked :thunbsup:

 

Please remove

 

 

Mario,

Thank you for answering this one !

I also found in the MF link above the same info for the 2011+ JCW

It seems that the only difference, engine wise, '13-JCW vs. '13-MCS engine is the exhst system, the Tune (ECU programming), and the turbocharger.

The JCW R56 N18, 2013 has the same Catalytic converter, same Air airbox, same pistons, same rods, same cylinder head and valves, same camshafts, same intake manifold, same injectors, same clutch, same transmission, same gear ratios, same tires as the 2013 MCS.