I got my a1000 fuel pump the other day and decided I didn't want to install that 'tank of a pump' so I fabricated this system. Its basically the rp fuel pump and the stock one together. I wrapped the pumps with rubber and clamped them together. I am going to run two lines to the front ( one for each pump ), join them, then separate them with one going to the primary fuel rail and one going to the secondary fuel rail. I have 800 primaries and 1600 secondaries. They will then exit to the Aeromotive Regulator ( one on each side ) and then return to the tank. Please give me some info on what you guys think of it and what problems I might face. You can see some more photos of the pumps here . Thanks!

BTW: If anyone wants to buy that A1000 pump Im selling it for what I bought it a Summit which is $290.

 

Wow,looks like it will work to me.

 

did you buy the filters for it (a1000) i need the 10 micron one.

i was and may still go with a dedicated line for each rail, but have not decided. i am using the A1000 pump and was going to split it with a y and use each line to go back in the regulator like youare describing, but have not found proof of why this would be better.
i was also going to use the stock hard lines as my returns. (y them after the reg and split them and use the delivery and return lines as my returns) instead i decides to just weld a AN fitting (steal) to the stock plate like you did for the delivery line and weld a tube to the pipethread to drop the fuel into tank and run a single -8 return.
anyone have any info on why splitting them (running rails in parallel) would be better or worse?

 

A buddy of mine did a similar setup a while back with an FD, he used 2 RP pumps and 2 -8 lines(one going to each rail, and using the stock return), it worked great and had no pressure drop or volume problems at all, with a single and high boost(30psi). On a side note he did run relays to both pumps with 10 guage wires so that they got alot of juice, these pumps require alot of electrical juice, so make sure you provide them with that because I don't see any provisions for bigger guage wires in your pic.

 

A split/parallel system will reduce pulse interference/fluctuation, while allowing a larger reserve during "surge" flows.

If plumbed in serial, upstream injectors pulsing will effect downstream injector efficiencies... remember the pulsation dampeners! ;-)

Flyin, Racin, and Buildin Rotary Beasts,
Carlos A. Iglesias
'93 RX-7 R-1 (Racin')
'95 M3 Sport (Drivin')
'01 Pathfinder SE (Towin')
http://www.the-rotary.net

 

stevenoz, check PM about Your pump for sale.

 

Maybe I am missing something but I just don't understand this "two pump" craze I have been seeing so much of lately. What ever happened to just putting in one appropriately sized pump? I run the Bosch pump and it's supposed to be good up to 600 hp. If I need more fuel then I would probably go with the Bosch 800 hp pump. The only advantage I see to running two pumps is if one of them fails you have a backup. But honestly I have never heard of one someone blowing their motor because their bosch pump failed. Maybe it has happened, but I haven't seen it.

 

Paranoia is still valid. Cheap insurance. Granted, I may not be a rocket scientist, but I like redundancy just like NASA!

 

Have you tested it? I think the strapped pump may "walk out" on you a little bit. Also, tell us how the noise factor is. Did you use fuel safe insulators? (the red stuff).

Got a dual pump in the works too. Got a prototype ready to use fittings and pop into a tank.

 

magnus offers a dual denso pump setup as well
Not sure of how its setup however.

 

I never got the Aeromotive filters because it hurts my feelings to spend 100 bucks on a fuel filter. I bought the RP pump a while back when I was using the stock twins because that was plenty of fuel for them. I have since rebuilt my motor, plan on running 25+ lbs. of boost on my Turbonetics T70, and need more fuel than the RP pump can produce. Its just something I am going to play with at the dragstrip for a while until I get tired of messing with it. I came up with this idea this weekend because I figured it would be alot cheaper and easier to install and should work good too ( not to mention alot quieter ). Plus I can still access it from the top. I am going to test it out of tank today and see how it works so I'll keep you informed.

 

You will have fuel pickup problems... you gotta make the very bottom of each pump rest either very close to, or on the bottom of the plastic baffle. It looks like one of your pumps is about a inch higher than the other.

Don't underestimate the effect of having inadequate wiring... the denso pumps are power hogs.

Redundancy doesn't work with fuel pumps... if one dies, the other will keep pumping but you'll suffer from a such a drop in pressure, your engine would run very lean anyway. Two pumps isn't redundant, it is just increasing your chances for a failure.

Wade

 

Stevenoz, I will take that offer on Your pump. Check Your PM, and how do You want payment.

I was thinking about buying this fuel pump relay from jegs for the big pump, what do You guys think, a waste of money?Also the Aeromotive needs a 10 AN feed, should i run 10 AN all the way to the rails or is that over kill for a T-72? I was thinking of using a reducer at the pump discharge and running 8 AN.

http://www.jegs.com/cgi-bin/ncommerc...77&prmenbr=361

 

Wade,

Explain, please. Interested in your comments. I have two pumps set in a custom bracket running in parallel up to the stock fuel outlet (join from a Y into the stock single line). How can this NOT be redundant?

Ah...I think your commented on this thread and not actually reading my mind and commenting on my setup.

So, if setup properly, 2 pumps CAN BE redundant. Gotcha.

 

Biggest problem I see is for instance if your 2ndary fuel rail pump quits, burns out, wire shorts etc. You wouldn't know it until your in-boost and the 2ndarys try to come on-line. This would most likely pop your engine. I just think if there's any problem with your 2nd pump you wouldn't know it until it's too late.

If a pump failed completely, in a single pump set-up, the car would most likely not start or die until you fixed it.

Now if flow is impeded, in either set-up, you are at risk. I run a single high flow pump with a fuel pressure guage and check it from time to time under WOT conditions to keep an eye on the situation.

Scott

 

I don't think pickup will be a problem...its only a tad higher than the other pump. Not to mention if you take the tank out and take a good look at it, Mazda did a pretty good job of designing it. The 'sump' that they put in the tank actually stays pretty full no matter how much you slosh it around. Also it has a lot of baffles to keep the fuel from hammering from side to side. Once again I didn't install the other pump for reliability...just so I my pressure doesn't drop off at higher boost levels. I ran them today and they are very quiet together. I think it will work out fine. I tied them together at the back and ran a -8 AN line to the front...split them up to 2 -6 AN lines...one for the primary and one for the secondary fuel rails. I do plan on running additional wiring to the other pump too.

 

Same here. I was wondering why don't you guys who are worried (like myself) who run a single pump, just use a cockpit mounted fuel pressure gauge to keep an eye on things.

I have mine mounted directly under the "A" pillar boost gauge just for this.

 

Badog,

I'm saying that two pumps aren't redundant. Meaning, if one fails, your fuel pressure will drop and you will run lean. So having two pumps only increases your chances of a problem, now you have two pumps you depend on working properly instead of only one.

The pump that doesn't fail doesn't have a way to make up the difference in flow once the other pump fails. Fuel pressure will drop, how much it drops, I don't know exactly, but I think it would be significant. It would be easy for someone with two pumps to test this and see how much their pressure drops at WOT when they disable one of the pumps.

Wade

 

An easy way to avoid this is to run 2 fuel pressure guages on each rail.

 

if 1 can do the job of 2 and there are no added benfits of 2 then i say stick with one. The only real way i see that having 2 is a benfit is if you have 2 that on their own can support your fuel needs.

 

I run an aeromotive A1000 in my drag car and have had no problems, however i would not run one in a daily driven car, IMO they are not made for that type of extended use, that is why I run twin intank 255lph in my FD, but i T'd them into 1 -8 line which ran into the primary rail, then the secondary rail than an aeromotive regulator, it was quiet and i never had a problem with it, the biggest thing that i found was that the stock wiring sucks i ran a relay and -10 power and ground wires to each pump which mad a big difference.... Good Luck, and do whatever floats your boat there is more than one way to skin a cat

Shaun

 

Anyone else have pictures of a dual setup? I was thinking about going with a single A1000, but it's so freaking loud and I don't want to take the extra time mounting it.

 

Heres mine, pic before I clamped them together:
http://www.msprotege.com/members/wrx...ndom%20620.jpg

Another:
http://www.msprotege.com/members/wrxto94rx7/random.jpg

 

Heres my set up....:

 

Dual Walbro's?