rmtypeR

I had my car fully decatted a couple of months ago - a V4 STi Type R. I'm still saving for a Power FC and remap, but I have a Walbro 255 pump already.

Will fitting the pump now reduce the chances of running lean (due to the decat), or will the std ECU just supply the same amount of fuel regardless? Having searched it looks like fitting the pump without remapping can cuase overfuelling, but I'd rather have that, than running too lean.

So, bearing the decat in mind, should I fit the pump now, or wait until the remap?

Thanks.

scooby-tc

iTrader: (2)

You might find that the walboro will overpower the standard regulator causing it to run very lumpy until its mapped.I did the exact same thing on my V4 type R and it was horrible to drive but once it was remapped it drives great again

jaytc2003

iTrader: (1)

remember overfuelling a lot as well can do as much damage as running lean.

rmtypeR

Thanks... I think I'll leave the pump in its box for now then!

gatecrasher3

A pump would be fine with a fpr though wouldn't it?

jaytc2003

iTrader: (1)

A pump would be fine with a fpr, to be honest it will probably be okay with the standard regulator. I have my walbro fitted with a standard regulator (only fitted it the day before I had a power fc fitted and mapped though so was minimum running)

shustir

Fitted the walbro 255 to my V5 Type R after having it decatted, not been remapped yet been about 2 months and not had any negative effects at all.

T5OLF

iTrader: (4)

I fitted full de-cat, Scott T chip and filter at the same time as fitting my 255 pump 6 months ago. Still running standard FPR with no problems