Fuel pump and tuning

[Steve Wood]

I'm all about "made in America" (and Canada too) but the Denso 280 is a great pump by my experience.Thi s is the Supra fuel pump.A manufacturer is not going to release and install a dud pump to drive warranty costs.The 280 will static a set of 80#'s at 15v in the tank.

A legit Denso should be a good pump.  It's history certainly indicates it to be.  If it recall correctly, it puts out very little more than a 255 Walbro at 70 psi, however, at normal voltages.  If needed, I would rather just buy a pump that was made to deliver the additional volume at normal voltages without having to gimmick the voltage to get there.

[The Radius Kid]

John, I have not seen that one...and I would be very nervous about one that I did not know came from a reliable source. 

Wonder what the dimensions are?

 
I thought it looked interesting when I found it.
Maybe Jack at Racetronics can test one?

[Steve Wood]

could be

[ttipe]

I'm all about "made in America" (and Canada too) but the Denso 280 is a great pump by my experience.Thi s is the Supra fuel pump.A manufacturer is not going to release and install a dud pump to drive warranty costs.The 280 will static a set of 80#'s at 15v in the tank.

A legit Denso should be a good pump.  It's history certainly indicates it to be.  If it recall correctly, it puts out very little more than a 255 Walbro at 70 psi, however, at normal voltages.  If needed, I would rather just buy a pump that was made to deliver the additional volume at normal voltages without having to gimmick the voltage to get there.

The fuel requirements for a twin turbo Supra are 3.5 bar + boost which is achieved at normal system voltage (13.5?).I have the fuel volume to pressure and voltage curves for this pump and there was a lot of mis-communicated data about this pump.If you look at the case area (top/bottom) compared to any of the Walbros its probably double (pi*r^2).The case size allows for a much larger pump arm than Walbro.The "torque" created by the larger pump arm means more volume per swing of the pump arm.This also means more wattage is req'd to drive this pump.The denso pump under load at 12v pulls in the area of 14A.When I increase voltage to 15V current drops to around 11A.I have to find the study I conducted on this pump but its locked up in my messed up external hard drive.This pump does not need 15V to to static a set of 60's at 70 psi.   

[Grumpy]

Found this searching around..

http://aeromotiveinc.com/products-page/fuel-pumps/11142-340-stealth-fuel-pump-offset-inlet-inline/

[daveismissing]

Found this searching around..

http://aeromotiveinc.com/products-page/fuel-pumps/11142-340-stealth-fuel-pump-offset-inlet-inline/

Do you get the feeling these are all coming out of the same factory?

The denso pump under load at 12v pulls in the area of 14A.When I increase voltage to 15V current drops to around 11A.

Gotta figure that one out...

[ULYCYC]

Found this searching around..

http://aeromotiveinc.com/products-page/fuel-pumps/11142-340-stealth-fuel-pump-offset-inlet-inline/

Looks like a good pump. Too expensive for Buick owners unless it's offered as a group purchase
Aeromotive has good customer service, also no fakes around at the moment. Buy them up

[Grumpy]

Too expensive for Buick owners unless it's offered as a group purchase

Isn't that the truth !! 

[Steve Wood]

Found this searching around..

http://aeromotiveinc.com/products-page/fuel-pumps/11142-340-stealth-fuel-pump-offset-inlet-inline/

Looks like a good pump. Too expensive for Buick owners unless it's offered as a group purchase
Aeromotive has good customer service, also no fakes around at the moment. Buy them up

what is interesting (to me, anyway) is that the Aeromotive pump puts out about 390 lph at 40 psi while Eric's TT340 pump that is aimed at E85 puts out about 360 at the same point. 

Aeromotive says theirs will work with stock fuel lines whereas Eric says his will most likely need a larger return line based upon his experience.

Eric's info  http://www.turbotweakstore.com/ProductDetails.asp?ProductCode=1008-TT340
24 month warranty

There are so many of these pumps appearing, I would not bet on the ancestry unless I knew the mother and father personally

[Grumpy]

There are so many of these pumps appearing, I would not bet on the ancestry unless I knew the mother and father personally

well thats the problem I have now.. IF the car was local I'd do one of them.. BUT then I get the ibby jibbys thinkin about if it fails down in Australia. 

[Steve Wood]

that is a problem more prevalent in us old guys

[Steve Wood]

The Denso is available world wide, I believe, that might be the universal solution.

[ttipe]

A couple of things about TT340.Does the flow bench used for the existing curve emulate the fuel lines in a GN? I saw nothing that reflects a wattage/amperage increase with use of the TT340 since the armature and pump size is limited by the size of the pump case.I just saw a racetronics 340m start to tank because the pressure relief valve was letting fuel by at less than peak pressure.This pump had few miles on it.Eric is a good guy and works hard on his calibrations and other products.No slam intended towards Eric.

[ULYCYC]

Think your reading a little too deep into fuel curves and specs.  Products like a fuel pumps turbos, carbs and a host of others need a baseline to set a spec for comparison.  A 1000 hp turbo will never hit its bench rating unless the rest of the build can match the simulated test.  I started this thread to warn of pump failures and keep a close eyeout for issues.  If Eric's pumps are not failing then it will work on 90% of the Buicks around here. Same goes for most pumps that on not fakes or defective like Walbros of a few years ago.
I agree with the other 10% that needs to pay close attention to a pumps output to make sure it will fit into your program. I wouldn't use any above for this. A external Fuelab, Magnaflo or Weldon would be my choice

[Steve Wood]

I wouldn't use any above for this. A external Fuelab, Magnaflo or Weldon would be my choice

That is pretty much it in a nutshell.  If one is going to run much faster than upper tens on race gas, then it is time to replumb the entire system to be able to deliver enuf fuel to meet ones goals.   In that case, it is time to sump the tank/use a fuel cell and go to a quality external pump.   For the rest of us that are not going faster than that, things are far simpler and don't take that much head scratching.