walbro 400lph fuel pump questions.

[CrawlinZX14]

Ok, so I have been looking for some definitive info about this, and was not sure where to post this. But I am looking at getting a wally 400lph pump for my talon. Not that its "needed" right now, but in the future I do plan to utilize it well. My question is for people that have used it, it says modifications to the fuel lines are needed. What modifications are NEEDED? I am going AFPR and -6 lines from the rail to the AFPR and to the return line, but I would prefer not to have to run new lines up from the tank to the front just yet. I know thats a little overkill for a 50trim on a stock motor with stock cams. I was debating between the stealth 340lph and the wally 400lph. So can anyone give me a little insight as to their experiences with these? I have an A1000 pump sitting right now, but dont want to sump a daily driver.

I have a rewire on the OEM pump already and its more than capable of handling any pump I throw at it. I just want to have a relatively easy swap out and capable of handling 15-20psi on a 50 trim.

 

[91stocker]

Not the exact pump but this thread should hopefully answer your questions.

http://www.dsmtuners.com/forums/newbie-forum/422918-minimum-requirements-aeromotive-340-a.html

 

[gsxeclipse97]

400 is well more than overkill most run a 255 or even a Supra tt. Unless your trying to shoot to the moon I don't see why you would need such large pumps on a 50 trim.

 

[CrawlinZX14]

This is in prep for later. Right now its a daily driver. Come spring I will be starting my build on a 2nd motor. I am going full race prep on the motor. Overall my goal is 9's on boost alone and spray into the 8's. So this is simply a prelude to not buying something I will have to replace later. I dont want to have the car not running while I build, so im going to keep the setup i have while I build a completely different motor to shoot the moon with. I know a 255 is plenty to hold what im currently asking of it, but in the future I would rather not have to replace the intank until I go full race and fuel cell.

I ran a dual 255lph pump on my supra with a 7mgte and a 50trim making 771whp and a good tune using a VPC. So im not unfamiliar with 255's. However, instead of needing a dual hanger and such, I am interested in the 400 instead of the dual 255's later. I mean face it a set of dual 400's would be a nasty fuel system and should potentially be way overkill for anything I could want to run. Including E85, race fuel, pump gas, whatever.

 

[airmail96]

Honestly I think -6an will be fine and -8an would be just for good measure. I think it really comes down to the ability of the pump to flow the amount of fuel you need to make the power you want, the fuel line justm akes it easier for that flow to get to the engine.

 

[CrawlinZX14]

Well its about keeping pressure with the larger volume later on. For now its about the larger pump in order to replace the OEM pump and getting rid of this phantom knock. Its not phantom, but its hit and miss at best. Mainly on very cold times, but she will knock occasionally just after a shift, and im an auto. I dont like it, and think im starting to tax the oem pump with the new turbo. The 13b ran 20psi no problem on it, but I think the added air volume and mass is taxing it now.