Reply With QuoteFuel pressure regulator yes, but standard injectors are ok for the K04.
The GT28 i believe needs bigger injectors.
Volkswagen Enthusiast
Does anyone know the flow rate (in cc) of the GTI injectors?
Would upgrading to the K04 require a new fuel regulator and larger injectors? Or will that only be requiered if your going to a GT28 turbo?
Volkswagenist
Fuel pressure regulator yes, but standard injectors are ok for the K04.
The GT28 i believe needs bigger injectors.
Originally Posted by Whubbsie
Volkswagen Enthusiast
I'd change the injectors for K04 upgrade. Do both for GT28.
Volkswagen Enthusiast
why? the KO4 only requires a new fuel regulator
Dub Crazy
VWwA Super Moderator
The TT and S3 with the 225 hp motors have bigger injectors as std. It would seem sensible tome to go for bigger ones if upgrading the turbo to a K04, unless you are not going to be using a 3 inch MAF.
Gavin
Sponsor
What you need to know is the desired fuel rate - three factors:
Injector size, Fuel pressure regulator, and fuel pump.
Its not much use putting a 5 bar FPR on it as you anly have a 3 bar fuel pump etc etc. You can go to a 4 bar fuel pump (TT / S3) but to be honest - the K04 is happilly fed by stock injectors & 4 bar FPR (with stock pump)
on our TT kit, we use a 5 bar FPR, 4 bar fuel pump in tank (now as the lift pump), 4 bar fuel pump in line & some pretty big Bosch Motorsport injectors
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