Injectors and fuel rail!

[jetpilot]

Hi guys, simple question i hope! Can i simply replace the primary fuel rail and 550 injectors with a secondary rail and 850 injectors?

[memski]

No you can\'t replace the stock primary rail for the secondary rail. You can however replace the primary injectors with secondary injectors. I believe this will require you to have an aftermarket mappable ecu and some minor mods to the primary rail to allow them to fit.

[jetpilot]

When you say minor mods, do you mean making the holes slightly larger to fit the bigger 850 injectors?

[20B_boy]

From another thread:

But I can tell you that the 850cc secondary\'s that I fitted would not of sealed against the primary fuel rail had I not machined it.

Yes they fit in the rail. But they don\'t seal.

and:

You need to take 2mm off the height of the fuel rail top face such that the injectors will push in further and the bottom o-ring will form a seal. Otherwise you will have fuel pouring past this seal into the inlet. At about 20ltr/min!!!

:yes

R.

[jetpilot]

Thanks 20B!

[nextleveluk]

almost there jetpilot, nice 1!