Fuel Pump Flow Test, Aeromotive 340 vs DW300 vs 044 vs Walbro

[GNVYUS 1]

Here is a great test done by AMS recently on the new fuel pumps vs the old.

Looks like the 044 will not overpower the stock FP return yet outflow the DW from 75psi on and even match the Aero 340 by 90psi (though none of us will get there).

 

[87GN_70GS]

Did they include the Jay Racing pro-series 044 and pro-series PT341?

 

[DR BOOST]

i recently used a stealth 340 and the lowest i could get the fuel pressure was 40 psi, which in my opinion is just fine.

 

[GNVYUS 1]

No on the Jay Racing pumps, AMS mentioned how they didn't have one available.

Ya Surej, that pump is a monster at low psi levels, this in your new setup?

 

[DR BOOST]

No on the Jay Racing pumps, AMS mentioned how they didn't have one available.

Ya Surej, that pump is a monster at low psi levels, this in your new setup?

it went into a buddy's car. i have two as a double pumper in my car.... i should have it running soon.

 

[SHADOWII]

When one of mine....

gives up the ghost, I know what I'll be going to next!:biggrin: Thanks for posting!

 

[KevinB]

Any idea on test voltage they used?

 

[GNVYUS 1]

They didn't mention Voltage, they had an Amperage Chart to go along with the flow chart, pretty much run a 20 amp Fuse with the new pumps.

They said the test was, Same Day, Same Test Rig, Same Fluid.

Considering the pumps at 30psi are flowing what the name of the pumps are called, I'd guess the test was around 13.5 Volts. They've done other fuel pump tests in the past and the voltage was 14 volts, that's the best I can narrow it down without them spilling the beans.

BTW, how odd is the 044 pump, it's a beast up top and a wuss at idle, guess that's why my FP settings didn't change at all from the Denso to it.

 

[bison]

Without knowing the voltages this chart means little. Some might be surprised at how much the lower performers pick up at high pressure with a couple more volts.

 

[87GN_70GS]

Without knowing the voltages this chart means little.QUOTE]

In an absolute sense, yes. About the only inference you could draw from this test is how the 4 compare to each other in a relative manner.

 

[turbo nasty]

Without knowing the voltages this chart means little. Some might be surprised at how much the lower performers pick up at high pressure with a couple more volts.

Very true....Hence a KB Boost A Pump

 

[GNVYUS 1]

I don't want to start, AMS said it was 14V, .5V more than most see so it's as real world as it gets.

 

[bison]

Very true....Hence a KB Boost A Pump

That will make any of those work a lot better than they did in that test if it was 14v. That old Bosch 044 is a brute for high boost efi cars.

 

[87GN_70GS]

I overlayed the injector characteristic curves for a 60 #/hr injector @ 100% duty cycle (roughly the same as a 70#/hr injector @ 85% dc) and for 60 #/hr at 85% dc for 25 psi boost. I also added the TI/Pierburg screw-type E3LM pump curve (interpolated for 14v).

At 70 psi, all pumps but the W342 just meet or exceed the fuel demands of the injectors (the 60 #/hr @ 85% has just a small amount of margin with the W342, 60 #/hr @ 100% falls quite short - you would have to back the total pressure down to around 63-64 psi).

This is for gasoline with no additional fuel source.