Does anyone have CONCRETE.... 100% verified ENGINE differences of:

1) Engine differences from the 2013 N18 equipped Factory John Cooper Works (JCW) car to the 2011 Cooper-S N18?
(note: there is a difference in my question for years of the N18 engines)

I DO understand that there is a difference in the ECU-Programming (AKA 'tune').... I'm more interested if there are "HARD PART" differences and WHAT those differences are... EG... injectors, pistons, compression-ratio, intake, exhaust (including downpipe and pipe diameter), camshafts, valves/porting etc...

2) What is the factory-rated HP of the 2013 JCW N18 2013 engine??

3) What is the factory-rated HP of the 2011 Cooper-S N18 2013 engine???

4) How are the 2013 JCW (N18) and the 2011 Cooper-S turbos different? (compressor sizes, turbin sizes, trim etc)


I have looked and found nothing on solid here on NAM ... but I am open if someone can point me in the right direction with links (thanks in advance)









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Anyone ??











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you're in 2nd gen JCW. mostly N14

 

 

N18 MCS is 181HP vs N18 JCW 208HP. You should find all the information in your owner's manual and OEM spec bulletins about pistons, exhaust, turbo etc....

 

Thank you for your reply.... much appreciated.



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I was going to say about $10,000

 

Huh???


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Small joke - the price, get it

 

Wondering if, besides a larger turbo and different tune, if there are any internal differences to the engines?



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MCS have Ko3 turbo
JCW have Ko3S turbo
ECU remap.

I think there are no other differences among them.!

 

K03 turbo has a 37.4mm compressor wheel, that's what they put on the MCS (N14 and N18 uses the same)
K03S turbo has a 40mm compressor wheel, this is used on all JCW (N14 and N18 uses the same).

To answer the OP's question, both MCS N18 and JCW N18 uses the same motor, but JCW has a larger compressor wheel in their turbo with a different map (the map part needs verification, at least, it's my impression that the map is different) You should also find another difference in the exhaust muffler where the JCW has a different muffler section and it sounds a little more aggressive.

 

No specific info on N18 engines, but one of the main differences in the N14 JCW and MCS is piston compression ratio. JCW is 10.0:1 while MCS is 10.5:1. Do some of your own research on https://www.realoem.com/bmw/enUS/select and look up piston part numbers. Or, contact piston suppliers such as CP Carrillo or SuperTech and ask them about differences.

 

2011 MCS
38mm compressor
10.5:1 pistons
.9mm head gasket
10.5:1 compression
Continental HPFP
2.5 bar MAP sensors
23 cfm MAF sensor
Bosch MEVD 17.2.2 ecu

2013 JCW
40mm compressor
10.25:1 pistons
1.2mm head gasket
10:1 compression
Bosch HPFP
3.0 bar MAP sensors
26 cfm MAF sensor
Bosch MEVD 17.2.4 ecu
Thicker webbing in the block and pistons are a little more sturdy.

Heads profile and cam specs are the same but are NOT interchangeable due to HPFP design and cam interface.

 

Tigger... WoW... What a great answer.... thank you for your thoughtful reply !!


I wonder on the 2013 R56-S if the engine details are different from the 2013 R56-JCW besides the tune and turbo?



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The 2011 MCS and 2013 MCS are the same with the exception of the HPFP and ecu. The 2013 has the Bosch HPFP. Some pin outs on the ecu are different so theres some differences in the wire harness. Mainly driven by the change in HPFP as Continental and Bosch use different control strategies.

 

Thank you !

Hope you can take a moment to answer this question.

The 2013 R56 "S" N18 and 2013 R56 "JCW" N18 engines.... mechanical differences in these engines?

If I read it right... a 2013 JCW N18 has different pistons and thicker head gasket and lower compression ratio than a 2013 S N18 engine.

Question:
Is the compression lower on the 2013 JCW N18 compared to the 2013 S N18 because of the .3mm Thicker head gasket on the JCW?
Or is the there a lower deck height or piston-crown volume on the 2013 JCW N18?

Any insight you can lend... much appreciated.

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Doh! (palm to forehead) Sorry I totally misunderstood the question.

2013 MCS and JCW have the same top end with the only mechanical differences being the larger turbo on the JCW and the sensors noted in the previous post. Same cams, injectors, valves, HPFP, etc.

Short block differences are also the same as noted above. JCW gets the reinforced block, lower compression and better pistons. Same rods, crank, oil pump, etc.

 

Is there anything that would be 'bad" about putting a 2013 JCW N18 in a 2011 MCS with N18?

I found a low mile 2013 JCW engine complete from a rear end totaled car at a reasonable price.




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As mentioned, the fuel pumps are different and not compatible....

 

Bumping because I'm also curious if this swap can be done.
I understand the hpfp's and pinouts are different... but if you had a n18 jcw longblock, harness, and ecu (or standalone) theoretically it should swap right in, right?
Ive been thinking about this swap for my N18 R55, not so much for the power, but a better platform to build from.

 

Don't know of anyone thats done it, but yes it should be possible with all of that plus both of the JCW MAP sensors and the MAF sensor.

Be advised however that the vehicle will need extensive coding afterwards. The VO would have to be a combination of your vehicle and the donor cars. There are differences in the DSC/ABS and KOMBI programming due to JCW brakes and the JCW using different gear ratios in the trans. IIRC after 10 hours of operation the VIN number in the DME becomes locked. There is some work being done to address that but I don't know if it is working on the N18 yet. If not the donor VIN would have to be coded into the other modules, the VO updated and the entire car updated. After that everything should work 100% with no error codes. ISTA and other diagnostic systems however would report the donor VIN number after that.

 

Thank you for all the tech help!




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Sincere queston Is it possible to use the 2013 JCW N18 bottom end (Short block)... with a 2011 N18 MCS Head and HPFP etc??

Especially if using a tune to account for the slight difference in compression ratio of the new combo.


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Any N18 "MotorHeads" have any input on this question?