HOW TO: Buschur Racing Double pumper

[crisdiarata]

in the morning the hoses had 87F and after 4 min goes up to 96F but after running 20 min goes to 106F include the aluminum unit than holds the two pumps, also when the car is cold, fuel pump are quiet but after 20min or so, is getting loud include the fuel hose from the fuel rail to the fuel pressure it happen when it's set to 45psi, if i turn the pressure down the vibration noise from the hose go's away and the fuel pump noise also reduce a little be, when i was running 255 walbro in tank an 255 walbro in line i have never had that problem.

[RedEvoVII]

So, we can assume that the heat is generated by the Pumps itself.
if both pumps running full speed all the time, they WILL produce the heat, because in stock config there is only one pump running, and additional with reduced voltage.
best bet would be to run the second pump with an Hobbs switch ( or with an seperate Ecu output if running an aftermarket ECU ) so the secondary runs only when it needed.

This will produce a lot less heat in the pumps.

Easy to test: Disconnect one of the pumps in the morning, and test temp during idle if it changes. DO not run the car under load with the secondary deactivated.
Its only to figure out where the culprit is

[crisdiarata]

thanks for your support, I have an AEM ecu how is the wiring setup to connect the second pump?
Also my tuner preferred was 2 pumps all the time, i have config than people runs 2 pumps all the time with not problem, i wondering how they do it?

[seenoevo]

Can someone please clarify the "IMPORTANT: make sure you install the siphon h tube , this piece the longer leg of the h goes on the return line side, if you don't install this piece, you will get low fuel pressure."? Is he just talking about the return tube extension in this pic?

[raiceboi697]

Which vacume line did you T into or does it not matter?

[b00stedtalon]

Which vacume line did you T into or does it not matter?

Intake manifold to BOV line is what I did.

[b00stedtalon]

Can someone please clarify the "IMPORTANT: make sure you install the siphon h tube , this piece the longer leg of the h goes on the return line side, if you don't install this piece, you will get low fuel pressure."? Is he just talking about the return tube extension in this pic?

Just be sure to install the "h".

[David Buschur]

Someone changed the one pump in that double pumper. On the top of the unit there are two fittings that align with the bottom of the "h", make sure the long side of the "h" is aligned with the smaller outlet.

DO NOT run both pumps at the same time. That's why it comes with a switch when we sell them. If you have an AEM EMS install a relay and trigger the 2nd pump at whatever boost level you want it to come on at, like 15 psi or something.