I am currently tuned for the following mods

IX MR
280's
Denatured Alcohol
TBE with HFC
MBC @ 28 psi spike

What needs to be tweaked to get the Walbro in the car and running well enough until I get a tune? If I just drop it in will it run fine, just rich?

Thanks

 

Should run the same and be fine at least until you get it tuned.

 

yup will run fine

 

itll be fine!

 

It might run a little rich on the top end if it was having trouble getting fuel before but it will be fine.

 

so u was running high boost with all those mods on your car and no fp and it was fine? damn what the hell do i need a fp for with hardly any mods.

 

You don't. The evo 9's came with a much better fuel pump than the evo 8's did.

 

I logged absolutely no difference after I dropped a walbro in my car and another IX that I tuned.

 

Definitely tune after Mod...on 8 needed to get FP on 9 FP was OK on CAI and TBE ...until injectors. Tune / Flash cleans up even stock to make more RWHP!!!

 

A Retune is not needed because of the Walbro persay...a Retune is done for an adjustment of air/fuel ratio dependent on factors such as boost, timing etc.

 

I think your definition of retune is different than most of ours.

If you're touching the map and adjusting AFR you are re-tuning the car.

The IX doesn't need a retune or any adjustment after installing the walbro.
AFR's are the same given a fairly stock car.

 

Sorry wrong choice of words....

 

Kimbo!!!

 

So if your tune is spot on for an Evo8, and all you're doing is upgrading to Walbro 255, no re-tune is needed?

 

Actually no, for an 8 you will need a retune. I just did a walbro 255 on my 8.

my AFR went from an 11.8 (maxing out the old pump 105% IDC) to a 9.9:1 at one point thats almost 2 full points richer. EVO 8 will requier a retune for the walbro 255. Unless you want a boggy flat 10:1 AFR