In the performance section we are still trying to figure out the size of the Cooper S turbo... however we've made some headway on sizing the JCW turbo. For reference; I've attached the compressor map courtesy from Umsports and BorgWarner of the stock Factory JCW turbocharger compressor!

Please note; the compressor is more efficient and higher flowing than a stock K03 or K04.

https://www.northamericanmotoring.co...pressormap.jpg

 

Yes, the JCW and S turbos are different. The JCW turbos are larger then the S turbos.

 

I was just looking at the part numbers for the JCW and S turbos and they are different. What is strange to me is that they both have the same price-$2,118.00.