evoiao

iTrader: (10)

I bought a new 400 walbro

I have all the bolt on's and kelford 270, along with skunk2 TB & Intake mani and 1000cc injectors

Currently the cars tuned and hitting 388 whp w/ E85

I want to install the walbro 400 fule pump.....will I need a re-tune if I install the pump.

I also plan on getting a AMS fuel rail and Ams Fuel line, but not righ now?

so fuel pump = tune or no rune?

thanks for your help....

EvoIIIAj

iTrader: (1)

What pump do you have now? It will most likely flow more than whatever you have so your tune might be a little richer so yes, I would get re-tuned..

evoiao

iTrader: (10)

yes I currently have a 255 walbro & want to go to a 400 walbro.

Someone said it will not even start?

evoiao

iTrader: (10)

Anyone else care to give their thoughts on this?

evoiao

iTrader: (10)

someone else have experience on this?

AreSTG

iTrader: (4)

a tune adjusts a/f ratio, timing, and maybe boost. If you are changing any of those with your modification, you should be getting a tune. a new fuel pump is a big mechanical change to your fueling system. You need a tune.

I saw your other thread, installed pump and car won't run. If that doesn't answer your retune question I don't know what does.

evoiao

iTrader: (10)

yup your are correct....im going to remove and get the tune when I get the new ams rail and fuel line....thanks

clubEVO93

iTrader: (8)

In my experiences with changing fuel and air. Most of everything will need a retune.

Retune= Gains+reliablity
Untuned=Gains+untuned for gains=the motor seeing the road in a different way/unless you dont beat on it!