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The stock S injectors are 340's and the Coopers are I believe 330's. No need to run the S injectors.
As far as i know, the stock R53 injectors are 330cc and the JCW ones are 380cc. The stock R53 injectors go up to 200+ bhp. I don't think the stock R50 injectors are enough for 200+ bhp, and it sounds too small of a difference just 10cc difference!
After lots of hours searching, i found the specs of the R50 stock injectors. They are Bosch EV6 injectors, 12 ohm resistance. The operating pressure is 4 bar, and at this pressure their supply is 205.5cc/min. At 3 bar pressure at the fuel rail, their supply goes at 178cc. I found all these specs from their Bosch part number, which is written on them, and it is 0280155991. Now it makes sense why they are not enough at high rpm.
Does anyone know what is the fuel pressure at the fuel rail? What pressure is the stock fuel pressure regulator?
