As above, would it be possible to use a walbro 255 pump as an external pump for a swirl pot set up?

 

Yes but you need to buy the external version

 

Cheers Banny. Would I be able to use this without having a Map tweak?

 

I dont see why not as it should not flow anymore being mounted externally, if you've already mapped for a 255. However for peace of mind especially if you're planning on going on track a fuelling check with a wideband lambda would be good

 

Cheers mate. A map tweak is not the easiest as JGM is the mapper of choice and I live in Glasgow

 

Something we have in common then, as Simon is my mapper of choice of to

 

Sorry to hijack the thread but what is gained fitting externally?

 

You need an external pump when using a swirl pot.

 

my fuel pressure went up 0.3bar when I fitted a bosch external/swirlpot. It was just a case of tweaking it back and then tweaking it up again when I disconnect for normal road use.
I wonder if it helps IDC,
Trev