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Dual 320 LPH pumps. Constant on or Hobbs switch?

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Old 03-05-2014, 02:12 PM
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Originally Posted by HexenLord
Here is the racetonix coupler I'm talking about:


I would like to know if this would work with walbro 416's
Old 03-05-2014, 02:27 PM
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Originally Posted by Racetronix

What are these 680s rated to? Are there any graphs of their output vs pressure?
Old 03-05-2014, 02:57 PM
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Originally Posted by Ryans99ls1
What are these 680s rated to? Are there any graphs of their output vs pressure?
These pumps are exactly the same as the Stealth pumps in performance.
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Old 03-05-2014, 03:37 PM
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Originally Posted by Racetronix
These pumps are exactly the same as the Stealth pumps in performance.
Awesome, thank you.
Old 03-05-2014, 03:46 PM
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Are those good for e85?
Old 03-05-2014, 06:12 PM
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Very interested on that dual set up. I like the clean install.
Old 03-05-2014, 07:07 PM
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Originally Posted by fly boy_1
Are those good for e85?
Websites says expect reduced service life.

Originally Posted by kylemm1002
Very interested on that dual set up. I like the clean install.
Website says only $250 for the whole thing. That's a STEAL for a clean setup with a pair of 340 lph pumps.

Originally Posted by Racetronix
These pumps are exactly the same as the Stealth pumps in performance.
Any idea if these couplers will work with my AEM pumps? They have a doubled barbed outlet tip so I'm not sure. Also, can the top be drilled out for an NPT or AN fitting?

Old 03-05-2014, 07:33 PM
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Originally Posted by HexenLord
Websites says expect reduced service life.

Website says only $250 for the whole thing. That's a STEAL for a clean setup with a pair of 340 lph pumps.

Any idea if these couplers will work with my AEM pumps? They have a doubled barbed outlet tip so I'm not sure. Also, can the top be drilled out for an NPT or AN fitting?
The E85 pumps have slightly different component compositions so they will provide longer service life in E85.
We have not tested the E85 pumps with this coupler yet. The length of the pump is also critical to this assembly.
We should have a dual E-85 version of this system this race season.

The SS bracket is designed for use with the barbs and Viton o-rings. There are some fittings available which have AN male on one end and barbs on the other. There is no need to drill or tap anything.
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Old 03-05-2014, 08:26 PM
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Originally Posted by Racetronix
The E85 pumps have slightly different component compositions so they will provide longer service life in E85.
We have not tested the E85 pumps with this coupler yet. The length of the pump is also critical to this assembly.
We should have a dual E-85 version of this system this race season.

The SS bracket is designed for use with the barbs and Viton o-rings. There are some fittings available which have AN male on one end and barbs on the other. There is no need to drill or tap anything.
I wasn't worried so much about the bracket. I just wanted the actual aluminum coupler. I wish I would have known you would have E85 versions available. I'm not 100% sure I'm ever going to run E85, I just wanted it as an option. I've already bought the pumps.
Old 03-05-2014, 09:08 PM
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Originally Posted by HexenLord
I wasn't worried so much about the bracket. I just wanted the actual aluminum coupler. I wish I would have known you would have E85 versions available. I'm not 100% sure I'm ever going to run E85, I just wanted it as an option. I've already bought the pumps.
The bracket is required to keep the whole assembly together from top to bottom. The o-rings in the DPC will not keep the pumps locked in reliably under high pressure.
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Old 03-06-2014, 06:53 PM
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Originally Posted by Racetronix
The bracket is required to keep the whole assembly together from top to bottom. The o-rings in the DPC will not keep the pumps locked in reliably under high pressure.
Do your pumps have built in check valves?
Old 03-06-2014, 07:32 PM
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Originally Posted by beavis
Do your pumps have built in check valves?
Yes they do.
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Old 03-07-2014, 03:13 PM
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Originally Posted by Racetronix
The SS bracket is designed for use with the barbs and Viton o-rings. There are some fittings available which have AN male on one end and barbs on the other. There is no need to drill or tap anything.
Can you point me in the direction what fittings you are referring to?
I just got this coupler a few months ago and this would be a great way to simplify my installation.
Old 03-07-2014, 03:31 PM
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Originally Posted by Racetronix

The SS bracket is designed for use with the barbs and Viton o-rings. There are some fittings available which have AN male on one end and barbs on the other. There is no need to drill or tap anything.
Would fittings like this work in the o-ring?


Old 03-07-2014, 11:02 PM
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Originally Posted by Boost infection
I would like to know if this would work with walbro 416's
Originally Posted by HexenLord
Here is the racetonix coupler I'm talking about:

Bump... I'd like to know as well. I'm going to assume not with the larger base on the 416/450 pumps though.
Old 03-10-2014, 09:54 AM
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Just did this this weekend...

Old 03-10-2014, 11:37 AM
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Originally Posted by ryanleiker
Just did this this weekend...

What holds the fitting down on the pump outlets?
Old 03-10-2014, 11:43 AM
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Originally Posted by Forcefed86
What holds the fitting down on the pump outlets?
the coupler has O-rings that secure tightly over the walbros. The pumps squeeze between the pump base on the hanger and the hard line being held on the top plate. It's quite sturdier than the picture implies.
Old 03-10-2014, 12:03 PM
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Is that top plate sealed so fuel cant get out ?

ie where wires and pipes pass through ?
Old 03-10-2014, 01:54 PM
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Originally Posted by stevieturbo
Is that top plate sealed so fuel cant get out ?

ie where wires and pipes pass through ?
The hard lines and wires and vent line are sealed with grommets, which I'll probably have to upgrade later after they deteriorate.


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