k_garretson23

iTrader: (8)

motor is a built 370, nitrous cam, 10.8:1 compression, mamomotorsport 235 heads, vic jr, stinger plate, accufab 4150 tb. The build is not finished yet but If Im running a stand alone for my nitrous fueling would a single walboro 340 surfice? Will be running on pump gas maybe race gas instand alone on occasion

RixTrix

Pump demand is governed by two things, total horsepower output, and fuel type.

Alky needs a considerably higher volume.

k_garretson23

iTrader: (8)

pump gas, im hoping for around 500whp on motor, 700-800 on the jug.

RobsZ28

iTrader: (3)

I run a single in tank 255 without a problem on my 347 it's a similar build as your 370. So a single 340 in tank and a separate standalone system you should be fine.

k_garretson23

iTrader: (8)

cool, i was hoping to avoid buying a squash dual pump for 800+

NOS LS1

iTrader: (3)

Single Walbro 255 intank Fuel pump is good for 650 HP. Max.

I have an LS2 404 ci. Stroker Nitrous Motor that makes around 650 HP on the Juice with a 150 Shot of Nitrous. Im not running a stand alone. The Single Walbro 255 supplies all of the Fuel for my motor & nitrous system. I am Maxed out now at 650 HP.

You could always run Dual Walbro 255's if you modify your fuel pump bucket. Make sure you run the upgraded Racetronix Fuel pump harness & relay with the 255 Walbro for safety & max fuel pump performance. Lonnie at Lonnies Performance is the Guru on Fuel systems. He is a sponser on this LS1 Tech site. http://www.lonniesperformance.com/

Stand alone Fuel system along with the Single Walbro 255 intank pump would be the way to go at 700-800 hp.

They say Low Fuel pressure supplied from stand alone works best with the nitrous system.

blk00ss

iTrader: (66)

A stand alone will continue with a fuel pump. Usually a walbro 255 or if low pressure a Holley blue or something.

My car makes 570rwp on motor with a single walbro 255. Spray 200 on top of it with a stand alone that has a walbro 255.

I have twin walbros in the tank from when the car was procharged a long time ago. Before j bought the stand alone I had the second pump to come on when the nitrous was activated. Worked fine. But was only spraying a 150 shot. Never went lean or dropped fuel pressure.

dburt86

iTrader: (2)

Im on a single walboro, making 390 on the motor plus a 230 shot and i have to add a ton of pulse width at the initial hit through the ecu to keep it from going lean.

I suspect im close to the limits with the 255.