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Default Difference Between The New R56 FJCW Engine & The Old - 15th June 2013, 09:56 PM

Can anyone tell me what the differences are between the 'new' R56 FJCW engine & the 'old' R56 FJCW engine?

Also, when was the new introduced?


  
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Default 15th June 2013, 09:59 PM

I assume you mean the N14 & N18 engines?

N18 came into production mid to late 2012.....



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Default Difference Between The New R56 FJCW Engine & The Old - 15th June 2013, 10:02 PM

The new n18 jcw engine is from july ish 2012. As far as differences you have things like brake regeneration, pops and bangs only with sport on (although epically loud) start stop too is on the n18.

The key areas of modification are to the pistons, which have redesigned crowns and new rings; an increase in diameter for the turbo feed pipe; a slightly larger air intake; a redesigned drive belt configuration and a modified dual mass flywheel.

Various materials within the engine, such as the head gasket, have been optimised. The new engine has a combined fuel figure of 42.8mpg versus 38.7mpg of old, and CO2 emissions fall to 153g/km from 169g/km.

Last edited by Greigjcw; 15th June 2013 at 10:04 PM.
  
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Default 15th June 2013, 10:07 PM

Cheers Greig

Found this as well - N14 vs N18 - North American Motoring

Sent from my iPad


  
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Default 15th June 2013, 10:10 PM

PS Can you notice any 'real' difference in driving / owning the 2 different engine types Greig?


  
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Default 16th June 2013, 05:40 AM

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Originally Posted by Bristle Hound View Post
PS Can you notice any 'real' difference in driving / owning the 2 different engine types Greig?
TBH apart form the noise theres very little. BUT the noise is amazing. When I first got my JCW back in 2010 it popped and banged quite alot and after a few dealer visits it was nearly non existent. I always ran it on V power too. The new N18 JCW on the other hand has no noise without sport on and when its on....well you've seen the video I did, colin it makes me smile every time I drive it, its hilarious the pops and bangs you get. Is that enough to push to an N18 well I am not sure. Every day driving you'll never notice, fuel economy well the last JCW sat at 33 all the time mines has slowly moved up from 29 to 34 now. Both can get 40mpg from both engines if you take your time (but then why would you lol)

So if you asking is it worth the wee bit extra to push for a newer N18 one IMO yes.

If you were looking at 2010 JCW's or for that matter 2011 ones then i'd say its a lot extra but if you start looking at 2012 JCW's then its a no brainer. TBH it's the same for the LCi. It came out in Aug/September 2010 I bought my last works in august but somehow it came pre Lci, huge mistake on my part, so if your looking at JCW's around then make sure its an LCi one mate. ( Iam sure you know but easiest way to tell is the interior, black dials and dash with gloss black steering whee trim)

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Default Difference Between The New R56 FJCW Engine & The Old - 16th June 2013, 07:16 AM

I had an N18 engine on my June 2011 S and now have one in my sept build 2012 JCW. N18 engine introduced to JCW from sept 12 onwards.

Clutch is slightly lighter on the new engine

N18 gives different head and also the exhaust return feed from the turbo is positioned differently from the N18

Intake hose is now rigid and HP has been increased slightly.

Mpg is increased as well. I regularly got late 40's early 50mpg on a good run in my S and now get mid 40's in my JCW.

You now ony get pops and bangs in sport mode on N18 engine which I prefer. Not good having the car do that at 0330 when I'm on my way to work!!



  
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Default 16th June 2013, 07:48 AM

My Cooper S has the N18 engine and I'm getting 43 mpg running on Tesco 99 but that's just normal driving to work; the last run I did I got 48 mpg but with careful driving I reckon I could get slightly more!

Exhaust note is a nice burble and in sport mode it sounds more aggressive but not a nuisance noise if you know what I mean....



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Default Difference Between The New R56 FJCW Engine & The Old - 16th June 2013, 08:09 AM

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Originally Posted by Scrounger View Post
I had an N18 engine on my June 2011 S and now have one in my sept build 2012 JCW. N18 engine introduced to JCW from sept 12 onwards.

Clutch is slightly lighter on the new engine

N18 gives different head and also the exhaust return feed from the turbo is positioned differently from the N18

Intake hose is now rigid and HP has been increased slightly.

Mpg is increased as well. I regularly got late 40's early 50mpg on a good run in my S and now get mid 40's in my JCW.

You now ony get pops and bangs in sport mode on N18 engine which I prefer. Not good having the car do that at 0330 when I'm on my way to work!!
I thought the power from the two engines was the same. ???

Mid 40's in your jcw eh!!!! Only my motorway driving pushes my mpg upto 34 normally its way lower.
  
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Default Difference Between The New R56 FJCW Engine & The Old - 16th June 2013, 08:16 AM

N14 in S is 175 bhp
N18 in S is 184bhp

N14 in JCW is 208
N18 in JCW is 211.



  
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