500 whp e85
07-21-2015, 12:23 AM
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500 whp e85
Hey guys could I get some opinions on the best way to set up my fuel delivery for 500 whp e85 I'm not sure what is best way to get this done . Car is a 1996 civic ex coupe , b18c1 gsr motor and tranny 10:1 compression top mount 5758 turbonetics turbo . This will be mostly a street car but it will see the 1/4 mile maybe 2 times a month . So should I sump tank or go with dual pump hanger ? Any advice is appreciated .
07-22-2015, 04:14 AM
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Re: 500 whp e85
and running two pumps constantly on a street car can cause serious issues if a pump fails.
This is why most "smart" people running dual pumps only have one pump running until a certain set of parameters is met to engage the second pump (rpm, load, tps, boost, etc) when it is needed. Obviously this would require an EMS that supported the feature but it is really the smartest way to do things.
Another reason people run dual pumps, especially on race cars that do things like endurance racing, is for redundancy. Normally these cars don't make enough power to require the fuel flow from two pumps but if they are out on track during a race and one pump fails the driver simply flips a switch to swap over to the second pump. This means they don't have to pit in and retire/tear the car down in pit lane.
But yea you definitely don't need dual pumps at that power level on a street car. Near the top of the very first page is this thread:
https://honda-tech.com/forced-induct...chart-3250715/
This shows you what kind of power a single 450lph E85 walbro pump can support on a properly setup fuel system at a base fuel pressure of 60psi... Get the dual pump nonsense out of your head, for you it's wasted money and over-complicating the setup
This is why most "smart" people running dual pumps only have one pump running until a certain set of parameters is met to engage the second pump (rpm, load, tps, boost, etc) when it is needed. Obviously this would require an EMS that supported the feature but it is really the smartest way to do things.
Another reason people run dual pumps, especially on race cars that do things like endurance racing, is for redundancy. Normally these cars don't make enough power to require the fuel flow from two pumps but if they are out on track during a race and one pump fails the driver simply flips a switch to swap over to the second pump. This means they don't have to pit in and retire/tear the car down in pit lane.
But yea you definitely don't need dual pumps at that power level on a street car. Near the top of the very first page is this thread:
https://honda-tech.com/forced-induct...chart-3250715/
This shows you what kind of power a single 450lph E85 walbro pump can support on a properly setup fuel system at a base fuel pressure of 60psi... Get the dual pump nonsense out of your head, for you it's wasted money and over-complicating the setup
07-22-2015, 10:54 PM
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