Hi all,
What size are the standard "yellow" cosy injectors and at what power level do they need changing?

thanks

 

About 270cc/min iirc? You'll want something bigger past 250bhp on a YB.

 

As above pretty much, think the part no suggests 280 cc though from memory. You want a bit of safety margin though.

 

What would you suggest for 350-400bhp?

 

I would say greys, but some get away with Light blues I believe.

Correct me if I am wrong dudes

 

greys or siemens blacks

you'll have to change the chip anyway so i would go for siemens blacks and go for 83lb as they are the same price as 72lb & 55lb

that way if you want more power in the future you wont have to change injectors again

83lb will do enough for circa 500hp

 

Yellows will do 280bhp no problem, mine did 277, at std rail pressure.
I would use greys for the 350-400, I have 375, with stacks of duty left and a 100% spot on tickover.

tabetha