OK, I've been digging around trying to get a good feel for the fuel system on an upcoming twin turbo set-up. I've seen rumors on people using various fuel pumps, twin set-ups, one big monster, hobbs switch turned-on, staged, etc.

but.....I can't get a clear picture of what people really are running.

I'm contemplating a single Aeromotive A1000, but I've heard some people having issues with them for continual street use, twin pumps is complicated, etc.

anyone pushing this kind of HP, what are you using?

I'm more than likley going to run 55lb injectors on a 355 SBC, twin GN turbos, and would like to have a solid fuel system, even if I start out with 42lb injectors at first, with low(er) boost. end goal is just over 15psi.

no need for the build-up critique. this is a budget deal for now, the GN turbos were cheap, I know there are more efficient ways of doing this, but in total I have less than 500 bux in two turbos and log manifolds. Once I've gotten a feel for boost, it will only be a matter of time.

hopefully, some good system recommendations will come out of this, and we can sticky to make this topic easier to sort out.

so.....whaddya got?

 

I am using an Aeromotive A1000 with one of their stepdown boxes. I just installed the fuel system this year, but I have driven around for over an hour and a half at a time with no problems. This was at slow speeds with fairly low fuel, which is the biggest cause of overheating with these pumps. The A1000 is good for around the power that you want and it is what I would suggest. Do a search on Turbomustangs for more info, there is a ton of it there.

 

thanks, that excellent information. I guess I'll have to sharpen my search ability over at turbomustangs.com. I didn't find much concrete info there.

the A1000 with its controller does seem to be the ticket.

BTW, Nice ride ya got there.

any other set-ups out there?

 

TM.com is the largest single source of high horsepower street knowledge that I have ever seen. I bought the pump from their classifieds and got most of my info there. LS1tech.com also has some good info, I got the controller there.

p.s There are a couple pics of my intake on TM.com in the BS section, just search for intake pics.

 

I'm also going to be using the Aeromotive A1000 but I have not started on the install yet because the gastank needs to be sumped and you will need to run custom lines. I'm waiting until the rest of my car is ready for the welders shop before I get that tank sumped (getting ready for cage, etc).

 

If you have the means go with WELDON pump.... Much better than A1000...but there is a price to pay to play... No matter what pump you buy get a controller for it if you do a lot of street driving...

 

I second that!
Weldon pumps are hands down the best pump out there for forced induction. With Forced induction, the fuel demands are much greater than a n/a or nitrous motor.
Just something to think about.
DonB

 

great information guys, this info will help out more than just me.

i checked out weldon pumps, it looks like the pump controller only has a full speed and a partial speed setting via a switch, whereas the aeromotive deal is rpm controlled. Is there more options with the weldon controller that aren't listed?

and yes, they are pricey. It would be a toss up depending on serious I would get I suppose.

curious if anyone is running dual pumps, etc, just to get a feel for all options.

 

2 x gph = max hp

 

Yea, if you got the $$$ then weldon is the ticket.

The aeromotive doesn’t so much have a problem with heat, but with it’s actual construction. They fall apart when they see anything resembling alcohol in your gas, which isn’t that uncommon with pump gas. Aeromotive will void your warranty if they see that kind of failure.

Really, for 6-700hp you should be OK with a 255 in tank

 

Make that pounds per hour and you got it.

 

Actually,the dial-a-flow from Weldon operates the pump like a radio`s volume ****.You set the **** so the pump slows down enough to barely affect pressure,which is a big difference from it`s speed at full voltage,and that`s it.When it`s time for WOT,throw the switch taking it from the low speed setting of the **** to full voltage.This is best done thru a hobbs switch set to a few pounds of boost as it`s tough to remember!
I`ve had the aeromotive step-down box on my car and it will only reduce voltage down to around 10-11 volts,which isn`t enough IMO to slow the pump down.I`ve had a couple of the Aeromotive "style" pumps before and the reason they failed was due to heat.Idling in traffic or constant low rpm cruise situations require nowhere near the amount of fuel to run the engine these pumps (Weldon or Aeromotive)will deliver at full voltage.With the pump working so hard the fuel is beat to death,increasing it`s temp,and losing all the good properties of gas.It gets aerated,losing pressure on the gauge until the pump slowely comes to a stop.For me,once this happened,it would never turn on again.Ask me how I know..........

I`ve ran my weldon under these conditions and it never stopped.Now I have the Dial-a-flow and I`m confident it will be the last pump I`ll ever buy.Get a 2025 with their controller and forget about your fuel system.Good luck!

 

Im not sure how it works BUT my dial-a-Flow instructions show An OPTIONAL RPM control module that overrides the POT setting...

However...IMHO basically you have a toggle switch thats goes from race/ street... How many street tunes wiill you have???? the reason I ask is...I set my dial for street run>>> and its SET... when I go to the track I flip the toggle switch and the pump runs full power...

I did not buy the rpm based module because It did not seem necessary for my application... I guess if your severely **** about it there would be some small benefit...But the POT adjustment will slow/cool it down more than enough according to weldon tech and my limited experience with it so far....

My only complaint on the dial-a-flow was that they only give you 6 feet of wiring for the switch...so to dash mount it you have to add wires...And I wish they would have given me a graphics plate for the switches so I did not have to make my own..

BUT if your running a weldon pump...run the weldon cntroller... vice versa... they were designed to work together... weldon sells kits that give you the proper pump/regulator/dial-a-flow for you app..

 

I would never ever run a 700HP car with just a 255lph in tank pump...LOL My corvette puts out about 450HP and the 255 walbro has a hard time keeping pressure @55psi..Look at the flow graphs for a 255....It does not FLOW HIGH AND MAINTAIN PRESSURE...especially if you run anything over ~45psi...

hell just look at the 255... I can stick the 255 INSIDE of the inlet of my 2025...lol

the only advantage of the 255 is that it cost $100

 

Lemme tell you from experience running pump gas through their A2000. I was trying to use it as a street strip deal and kept burning them up. Once I finally sent it back to Aeromotive their customer service is one most in the industry could learn thing from, they had FAST turnaround and went above the call of duty helping to design a fuel system for my needs. They will not void your warranty if you run pump gas through it

You wont go wrong with Aeromotive and the A1000 is the pump they recommended for me since I street drive it, plenty of fuel to keep you going.

 

Physical size isn’t everything.

FWIW, I know for a fact that with the rest of the fuel system done right a 190L/Hr (yes, not a typo, 190) will feed a 500hp supercharged engine (fuel pressure stays up, no issues… of course we did find that 36pph injectors were too small on that combination).

I’ve seen more then one car run a 255 intank (like a walbro 307 or better, or the holley or edelbrock pieces which are just walbros anyway) well into the 700hp range, and I’ve seen a couple of f-bodies and one vette running a stock intank pump and an inline, in series, about the equivalent of a 255 well into that range.

Like I already said, I’d much rather see a Weldon, but I know that _I’m_ not going to pay for one…

Well, it burning up somewhat answers the thread unless there was something wrong with your fuel system to cause it.

WRT to your luck with their customer service, that’s great… but that is not the experience that a few local guys have had with them.

 

The pump burning up was my own doing, buying a strip only pump and expecting it to live behind hours of continuos running on the street was dumb on my part, the thing pumped out 1 gallon in 11 seconds, that's how much pump it was with my fuel system, so you know that's overkill-the way I wanted it, but I should've at least had a brain box installed with it, but after talking to Aeromotive the first time they said that would'nt have helped either as that pump (A2000) is NOT DESIGNED for continuous duty, and they were in fact impressed dumbfounded the pump lasted as long as it did for a street/strip application. The system is dead headed, and a pump that size churning out that much gpm is going to get the fuel hot and start taking a toll on thing internally since the motor is constantly working under extreme conditions.

Have since changed pumps to go along with my double duty and so far so good, still firm beilever that nothing is as good durability wise as OEM, but until OEM makes a pump for racing applications we're left with the aftermarket.

Sorry to hear your buddies have a bad time with Aeromotive customer service, my experience was great and I've recommended them to many others. A person can e-mail or call them anytime with questions and get correct answers quickly.

 

That right there was probably your biggest problem…

The Aeromotive setups that I’ve seen that have fallen apart with a proper return, plenty of gas in the tank (keeps things from overheating when the big pump is moving a lot of gas)… have all been labeled as “alcohol contamination” problems. From what I’ve heard it dissolves an adhesive used in the pump causing a very distinct failure.



If you want a big pump, stock pump look at the big inline bosch & airtex pumps used in some Mercedes, Porsche, BMW, Cadillac…, they are all in the flow range that we’re talking about and OEM quality. Cartech and some others used to sell aftermarket fuel systems using them, and a lot of the boost pumps used by the supercharger manufacturers are rebadged ones.

 

would you happen to know the models that used these pumps that you're talking about? Like, which cadillac?

does bosch publish pump specs that non-oem guys can see?

so far, this has been a good discussion. It sounds like the most logical path would be the weldon, but pricey!!

i probably would go with the aeromotive, and break their stones if there pump craps out on pump gas. especially since they advertise them as street/strip pumps.

 

Look for early 80’s turbocharged Porsches, the large engine Mercedes and bmw’s from roughly the same years… for the bosches. The caddy pump was used on and off on the big injected caddies from the early 70’s through the 80’s.

The pump specs are available in dealer catalogs, but I don’t know how the average person would get a hold of them.