2G Dual Fuel Pumps options

[Yamahaulin]

I have the full blown dual setup in my 2g loaded with walbro 255hp pumps running e85. I believe one or both are going out. Is there a better option for pumps like aeromotive or the jay racing 340. Or is the increased cost of those not really worth it. The walbro's are cheap and they are supporting my power level at the moment. The walbro's have lasted about 10000 miles and i'm roughtly making 600awhp. Next turbo may increase power to 750 but i would think walbros would support that as well.

 

[gsxeclipse102]

I believe walbro makes e85 specific pumps. Either 400's or 450's.

 

[ThunderChild]

I dont have a dual pump assy. but i did go with an aeromotive 340 stealth pump on my car and I'm very happy with it. very quiet, more flow, less current draw and less flow-loss up top compared to walbros. I believe the pumps are only about 80-120 w/o install kits, since you could use most of your wally stuff.

 

[Yamahaulin]

The walbro 400's and 450's are larger in size than the 255. I can't have anything that's larger as the 255's are a squeeze.

 

[Brandon Mau]

I am currently running twin 255's but i'm pushing the limit at a tad over 600. Ran a single aero 340 and loved it. Not a ton of info out on the aero 340 or jay racing at that. I will probably end up running twin jay racing pumps after talking to a well known tuner in Virginia. I am going for the same overall fuel support and auto which takes a bit more to reach than a manual with drivetrain loss.

 

[ThunderChild]

This is the best info I've found on the aero 340, and what prompted my decision.

If i ever need a dual pump setup, ill get dual 340s.

 

[bastarddsm]

I would probably go dual 044's if it was me. Actually, I'm getting ready to do that.

 

[ThunderChild]

I would probably go dual 044's if it was me. Actually, I'm getting ready to do that.

I would do this as well, but aren't the 044's external pumps, or do they have and internal model as well? if not, a single 340 or walbro 450 to a surge tank and twin 044's could do it, but thats beside the point. just curious cuz i thought the 044 was external only and haven't done any further research on it.

 

[bastarddsm]

They can be used internal. I would run them external though. It's not that hard to make a pickup.

 

[Yamahaulin]

Fury are you feeding with a -8 and returning with a -6. Seems like the 2 255's shouldn't be maxed at 600. This is the setup I'm running with 2150 injectors.

 

[Brandon Mau]

Fury are you feeding with a -8 and returning with a -6. Seems like the 2 255's shouldn't be maxed at 600. This is the setup I'm running with 2150 injectors.

-8an feed and -6 return is correct but I am on a automatic setup. I have never used a 044 so I can't comment. Jay Racing's site claims that his 340 outflows and draws less amps than the 044. To me either choice would be a good one, I would rather have some room than maxing out. My twin 255s are about tapped out at 38 psi,66mm turbo.

 

[Yamahaulin]

Anyone have any real world usage of the jay racing? Wonder if it's any better than the aeromotive 340. I'm gonna be purchasing one of those two Aero or Jay. Just driving my car as a daily back and forth to work you'd never know there was an issue so i have a bit of time to see if anyone has compared those 2.

 

[NB4G63T]

-8an feed and -6 return is correct but I am on a automatic setup. I have never used a 044 so I can't comment. Jay Racing's site claims that his 340 outflows and draws less amps than the 044. To me either choice would be a good one, I would rather have some room than maxing out. My twin 255s are about tapped out at 38 psi,66mm turbo.

Have you punch in your psv? Those pumps will start to open their psv @ about 80psi [43psi BFP + 38psi boost = :-(] I've ran those pumps for years without the psv's punched and I'd go lean @ 38psi, now with the valve punched in I can boost too 45 with no issues. I have been palying with these cars for along time and never knew that about the wally 255 pumps. (psv's dump @ 80psi) till couple years ago.

I'm also quite impressed with the areo 340 output and I'm switching to two of them this year. I'd not seen the real street comparison before till today, good info there.

 

[Brandon Mau]

Have you punch in your psv? Those pumps will start to open their psv @ about 80psi [43psi BFP + 38psi boost = :-(] I've ran those pumps for years without the psv's punched and I'd go lean @ 38psi, now with the valve punched in I can boost too 45 with no issues. I have been palying with these cars for along time and never knew that about the wally 255 pumps. (psv's dump @ 80psi) till couple years ago.

I'm also quite impressed with the areo 340 output and I'm switching to two of them this year. I'd not seen the real street comparison before till today, good info there.

The relief valves are punched out, I even raised the base fuel pressure to 50 P.S.I. Once I increased my ve cells and the afr's didn't change I knew I was maxed out. Looking at your profile you are running meth injection still I assume? I had ran that the past few years and negated roughly 10% of global fuel due to richer AFR's with meth injection. If you are still running 91-93 octane then your results will be quite a bit different than Ethanol. I have no idea what you are running just going off what's in your profile. The other thing you have to take into consideration is your still on a 5 SPD trans the auto takes a heavier hit to drivetrain loss over the manual. Running 38 P.S.I for me nets 78-79 LBS/MIN so the 255's definitely did a great job they just simply are not enough for my set-up any more.

 

[NB4G63T]

I agree with everything you're saying. I too was flowing in that range with my 3586 @ 38psi ad yes I'm on 91 piss and a lot of meth. From your reply, you know whats up.... don't take my newb reply as negitive.

 

[Brandon Mau]

I agree with everything you're saying. I too was flowing in that range with my 3586 @ 38psi ad yes I'm on 91 piss and a lot of meth. From your reply, you know whats up.... don't take my newb reply as negitive.

You built a 10 second car which takes knowledge. I don't think your response was a newb reply by any means. It's very good information for everyone when looking at "us guys" that are still running dual pump set-ups rather than one big aeromotive or Weldon pump. Now they can compare (auto to manual), (pump gas with methanol injection to Ethanol), I have never came across a thread about 340's in a dual pump hanger.

 

[NB4G63T]

Thanks man. I just read your reply and felt sorta dumb is all. Before I read the real street test of those pumps It was my undering the wally 255 was the best flowing pump in the 12.5-13v range cause a lot of dsm charging systems only put out that at WOT. So I was pleasently surprised to see the out put from the 340 pump. I liked them so much I just ordered two that I'll switch out and use with my full blown hanger. I don't have any E85 up here so I'm stuck with meth and pump. I can still run big boost and pretty aggressive timing while injecting meth. Guy I was tuning with out of NY was amazed at the peak timing I could run safely, we did multiple plug chops to come to that conclusion. I just need to incorporate a fail safe of some sort for my meth.

 

[Yamahaulin]

Thanks man. I just read your reply and felt sorta dumb is all. Before I read the real street test of those pumps It was my undering the wally 255 was the best flowing pump in the 12.5-13v range cause a lot of dsm charging systems only put out that at WOT. So I was pleasently surprised to see the out put from the 340 pump. I liked them so much I just ordered two that I'll switch out and use with my full blown hanger. I don't have any E85 up here so I'm stuck with meth and pump. I can still run big boost and pretty aggressive timing while injecting meth. Guy I was tuning with out of NY was amazed at the peak timing I could run safely, we did multiple plug chops to come to that conclusion. I just need to incorporate a fail safe of some sort for my meth.

Which inlet/outlet configuration did you order? Let me know the fitment when you get them so i know i get the correct ones. While i wait on your fitment comments I've sent an email to Jay Racing to try and get some feedback from him on his pumps as I've had many good dealings with him in the past. Right now mine won't build over 60psi of fuel pressure so i'm pretty sure it's not the psv.

 

[DSM's 4 life]

I personally like the bosh 44 pumps they feel like a better built more substantial unit but I have seen failures on a 44 and walbro 255.

Kinda Unrelated comment but I see a lot of knowledge here and was wondering how you calculate your AFR'S when injecting meth since some people are dealing with 91-93 octane vs E85. having Different Stochometric ratio's

 

[d1prospect]

I use a aero 340 intank and Bosch 044 inline. So far have pumping just fine with no major draw issues

 

[bastarddsm]

I always thought the 340's (AEM, Aeromotive, ect.) were kinda weak suck at high pressure.

I kinda want to try a pair of these, but the price sucks. http://www.racetronix.biz/itemdesc.asp?ic=WSP330&eq=&Tp=

 

[DeadlyAKrunna47]

I really like the aem 320lph pumps. They are super quiet, and work well. My system is full blown assembly, I have 255walbro for cruising, and a secondary 320lph aem pump for doing wot pulls.
I don't recommend full blown assembly, as they are a pain to use. Best to just modify the stock assembly.

 

[50trimgst]

What's so bad about the full blown assembly ? I'm currently putting one with 2 DW 340 in my awd car.

 

[ceedawg]

What's so bad about the full blown assembly ? I'm currently putting one with 2 DW 340 in my awd car.

I find it works pretty good as well.