Whats max fuel psi
12-09-2009, 06:58 PM
#1
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Whats max fuel psi
Whats the max fuel pressure that is safe for the vp44? looking around at lift pumps and am wondering if i need a regulator or not. thanks
12-09-2009, 07:35 PM
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What kind of pumps are you looking at? Most pumps for the diesels have built in regulators.
Most say that 20 psi is about all you want to feed to the vp.
Most say that 20 psi is about all you want to feed to the vp.
12-10-2009, 08:11 AM
#4
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I believe anything over 14psi causes the VP psi relief valve to open. At that point you're supplying all the fuel it needs and more. Adding any more psi than this ahead of the filter housing will only cause you fuel leak issues...probably not right away but it will occur mainly around the top of the fuel heater wires leading into the filter canister.
12-10-2009, 08:46 AM
#5
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Most people running 16-20 have no problems after years of service. Some claim no problems running 25-30 psi??
I wonder about the cooling effect (to the VP-44) of circulating some additional fuel. Could it be a positive?
I don't see the fuel heating from extra fuel pressure being a problem.
I was one of many involved in a study to test fuel temps (in the tank) under different conditions.
All tests involving fuel temps after 1 hr or more of continuous operation showed amazing consistancy.....
no matter what the fuel pressure involved was, or what level of fuel remained in the tank.
Tank fuel always seems to run about 15* above ambient air temps.
Those having an Adrenaline box, have the ability to read Fuel Temps, at the VP-44.
It would be interesting to compare these when knowing the fuel pressure, in each case, as well!
RJ
12-10-2009, 09:11 AM
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I believe anything over 14psi causes the VP psi relief valve to open. At that point you're supplying all the fuel it needs and more. Adding any more psi than this ahead of the filter housing will only cause you fuel leak issues...probably not right away but it will occur mainly around the top of the fuel heater wires leading into the filter canister.
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12-10-2009, 08:18 PM
#9
No one seems to know for sure, how much FP is too much!
Most people running 16-20 have no problems after years of service. Some claim no problems running 25-30 psi??
I wonder about the cooling effect (to the VP-44) of circulating some additional fuel. Could it be a positive?
I don't see the fuel heating from extra fuel pressure being a problem.
I was one of many involved in a study to test fuel temps (in the tank) under different conditions.
All tests involving fuel temps after 1 hr or more of continuous operation showed amazing consistancy.....
no matter what the fuel pressure involved was, or what level of fuel remained in the tank.
Tank fuel always seems to run about 15* above ambient air temps.
Those having an Adrenaline box, have the ability to read Fuel Temps, at the VP-44.
It would be interesting to compare these when knowing the fuel pressure, in each case, as well!
RJ
Most people running 16-20 have no problems after years of service. Some claim no problems running 25-30 psi??
I wonder about the cooling effect (to the VP-44) of circulating some additional fuel. Could it be a positive?
I don't see the fuel heating from extra fuel pressure being a problem.
I was one of many involved in a study to test fuel temps (in the tank) under different conditions.
All tests involving fuel temps after 1 hr or more of continuous operation showed amazing consistancy.....
no matter what the fuel pressure involved was, or what level of fuel remained in the tank.
Tank fuel always seems to run about 15* above ambient air temps.
Those having an Adrenaline box, have the ability to read Fuel Temps, at the VP-44.
It would be interesting to compare these when knowing the fuel pressure, in each case, as well!
RJ
12-10-2009, 10:10 PM
#11
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I've been running close to 40 to mine for the last two years with no leaks from the filter. Seems pretty sporadic.
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