Basically we wanted to perform a test here at the shop and settle the argument that 3 pumps in a fuel hat cause way too much heat and can not be used. The other issue we wanted to see was if in fact buy running 3 pumps you will suck the bucket in the tank dry.
Here are a few pictures of our setup. Basically I started with a stock 2005 mustang tank and cut a large hole it in. This way we could see inside the fuel bucket while both combos were running. We would also be able to check various temps as we were conducting the test.
The fuel system was setup as a returns style fuel system where the pumps are running 100% at all times. What we have simulated here is a car idling (using minimal fuel) where the pumps are under the most load.
On to the pics
Basically I set up the go pro so we could video the entire test in fast forward so no one will think we tried to favor one set up or the other. Honestly we have no reason to mislead anyone since our hat will do both 2/3 pumps. Its nice to set it up like this so that you have room to grow.
Here are the test Results
So all in all I think you can see from the numbers above a 3 pump setup doesn't add much if any extra heat. Basically it may heat the fuel up a bit quicker but all in all the numbers don't lie. Both setups added 25 Degrees.
Both times we used 50 PSI on the regulator
We used a voltmeter to watch our voltage. We used a regular 12v battery and a charger so we were about to keep it right around 12.75 -13 volts.
here are your 400 test numbers
We also did our flow test.
Triple 342s flow 155 Gallons per hour @ 13 volts and 50PSI
Dual 400s flow 139 Gallons per hour @ 13 volts and 50 PSI
Triple 400s flow 169 Gallons per hour @ 13 volts and 50 PSI
Al tests were conducted with pump temp in the range of 90-95 degrees!
So all in all to me it seems to be pretty clear that a triple 342 will out preform a dual 400 set up in both cases(heat and flow). I will also add that the 342s are cheaper!
Walbro 342 are 100 Each
Walbro 405s are 159.95
Also i will add unless you are making 1000 RWHP on E85(1450 RWHP on race gas) you don't really need need triple 400s. We can support over 1000 to the tire on regular fuel with the 342s. We have proved this with several cars.
Here are a few pictures of our setup. Basically I started with a stock 2005 mustang tank and cut a large hole it in. This way we could see inside the fuel bucket while both combos were running. We would also be able to check various temps as we were conducting the test.
The fuel system was setup as a returns style fuel system where the pumps are running 100% at all times. What we have simulated here is a car idling (using minimal fuel) where the pumps are under the most load.
On to the pics
Basically I set up the go pro so we could video the entire test in fast forward so no one will think we tried to favor one set up or the other. Honestly we have no reason to mislead anyone since our hat will do both 2/3 pumps. Its nice to set it up like this so that you have room to grow.
Here are the test Results
So all in all I think you can see from the numbers above a 3 pump setup doesn't add much if any extra heat. Basically it may heat the fuel up a bit quicker but all in all the numbers don't lie. Both setups added 25 Degrees.
Both times we used 50 PSI on the regulator
We used a voltmeter to watch our voltage. We used a regular 12v battery and a charger so we were about to keep it right around 12.75 -13 volts.
here are your 400 test numbers
We also did our flow test.
Triple 342s flow 155 Gallons per hour @ 13 volts and 50PSI
Dual 400s flow 139 Gallons per hour @ 13 volts and 50 PSI
Triple 400s flow 169 Gallons per hour @ 13 volts and 50 PSI
Al tests were conducted with pump temp in the range of 90-95 degrees!
So all in all to me it seems to be pretty clear that a triple 342 will out preform a dual 400 set up in both cases(heat and flow). I will also add that the 342s are cheaper!
Walbro 342 are 100 Each
Walbro 405s are 159.95
Also i will add unless you are making 1000 RWHP on E85(1450 RWHP on race gas) you don't really need need triple 400s. We can support over 1000 to the tire on regular fuel with the 342s. We have proved this with several cars.
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set up which is 100% inaccurate. It was really irrelevant to us since the cp-e hats that we use and sell will support 2 pump or 3 pump designs and the cp-e hat is the only hat currently on the market that can support 2 or 3 pumps and support the Walbro (USA) 342/400/450 pumps. ( or 405/465 whichever the flavor of the week name is for the last 2 pumps ):rockon:
