Originally Posted by -=gRay rAvEn=-

jeesh was getting a migraine reading all this....Braminator was correct in what he previously stated. A factory JCW R55/56 and R55/566N produced up until early 2012 has the N14B engine. So if you have a 2011 MCS JCW it has the N14B. If you have a 2011 MCS it has the N18B. Additionally, from what I have read, the turbo from an N18 engine has significant design differences making it the better of the two ( earlier R56 vs. newer ) the newer one produces boost much faster with less friction/heat due to different type of internal bearings ( needle vs. ball bearing style ) and scroll fin angle. I'll admit, I am more of a Supercharger Officiando but this is my understanding of the two Turbo designs.

Originally Posted by Braminator

N14 Engine - N14B16AC[*]Infinitely variable single VANOS (intake only)[*]Siemens DME MED17.2 engine management N18 Engine - N18B16M0[*]Infinitely variable double VANOS[*]Map-controlled oil pump[*]Variable valve timing (Valvetronic) with 3-phase servomotor and integrated eccentric shaft sensor[*]Composite camshaft construction[*]New piston design[*]Siemens DME MEVD17.2.2 The PCV design is updated in the N18. Rather than an external hose on the passenger side, the vacuum line is internal to the valve cover. This was intended to reduce pooling in the intake manifold. The boost line between the valve cover and turbo intake pipe is also different. The N18 added a cosmetic cover over the front of the valve cover. The N18 adds a small heat shield over the turbo oil pipe to help mitigate any coking in the line. The turbo intake pipe in the N18 is rigid, as opposed to the flexible pipe in the N14. The noisemaker is eliminated in the N18. The N18 oil dipstick is different

Originally Posted by ChiliRedR56raleigh

Yeah, I know all of the specs and details that were changed on the engine, such as Double VANOS, engine cover, etc... I'm just confused what Grayraven is saying about an "R55/566N" having an N14.

Originally Posted by bmx045

what don't you understand? factory JCW's up until early 2012 have the N14. Cooper S's and clubman s's model year 2011+ have N18. it's pretty simple. i've confirmed this when asking a mini tech as well.

Originally Posted by cerenkov

R55/R56 is pre-face lift and R55N/R56N is post-face lift.

Originally Posted by KilmerPT

Sorry to hijack the thread a bit, but as long as we are talking about differences between N14 JCW and N18 JCW, I just want to add that there is also another difference with the exhausts between N14 JCW and N18 JCW motors. N14 JCW exhaust has one large resonator after the downpipe. N18 JCW has 2nd cat and smaller resonator after downpipe. I would think this also has affect on overall performance between the two cars. Sent from my iPhone using NAMotoring

Originally Posted by cerenkov

I've always used LCI also, so does the N signify the switch the the N18?

Originally Posted by ChiliRedR56raleigh

I've never heard of the 'N' to signify a different generation. Maybe it's just his way of signifying it?

Originally Posted by ChiliRedR56raleigh

I noticed that there is a slight difference in the sound of the 2 generations, but didn't know what the cause was. I thought it was just due to it being broken in. After driving a loaner from the dealership I noticed that the new car's exhaust was louder than my 2011 S. Do you guys think that could be simply due to the new one not being broken in as well?

Originally Posted by KilmerPT

I had a 2011 MCS, from what I can tell ya', the 2nd cat and resonator are the same after the DP, and then the mufflers are different. I'm pretty sure that is where the change in sound is coming from the most. Sent from my iPhone using NAMotoring

Originally Posted by ChiliRedR56raleigh

So the mufflers are different between 13 and 11's? Did anyone else notice that in 09, I believe, they did a recall on the muffler tips sticking out past the bumper...burning legs, etc... Then it seems like they said screw it and put the ones back on that stick out. I've burned my leg twice, and my cousin burned her leg too on it getting something out of the boot.

Originally Posted by KilmerPT

. I'm saying the difference between the N18 MCS and JCW exhaust is just the muffler and tips from my experience. The difference with N14 JCW and N18 JCW is what I stated above. Sent from my iPhone using NAMotoring

Originally Posted by ChiliRedR56raleigh

I get that. I said the same thing 10 times. That's what I corrected from the beginning. If you read Grayravens post, he lists two seperate chassis codes. One JCW and one non. I'm trying to figure out what he means by "R55/566N"

Originally Posted by ChiliRedR56raleigh

Oh okay. Yes i knew the JCW just had the "back box" to give it that throatier exhaust sound. I wonder what the difference between the '11 MCS and '13 MCS muffler is to cause the exhaust to be louder, besides mine just being broken in.

Originally Posted by -=gRay rAvEn=-

You brought up the R55 ( clubman ) so I added it to the heap. If you have a JCW whether it be a R56 or R55 it will have the N14B....to early 2012.