fuel pump pressure

mopops

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anybody know what the pump out put pressure is for a 81 Imp with factory efi , i need that info for parts guy so i can get a regulator to drop it down for carb use tks
 

BudW

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7.5 to 11.5 PSI.
Non injected '81 V8 is 5.8 to 7.3 PSI.

11.5 PSI is too much for a carb, without a regulator.
BudW
 

Ele115

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Bud did post that, and if you are buying and installing a regulator, what I posted may be of value, if not, disregard one or more of these posts. Sorry to waste your time
 

mopops

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Bud did post that, and if you are buying and installing a regulator, what I posted may be of value, if not, disregard one or more of these posts. Sorry to waste your time
OK fuel injection pressure 11.5 seems low
 

Aspen500

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The old CFI and TBI fuel injection was low pressure. Usually in the 11-14 psi range. They used low pressure pumps. Biggest reason they didn't work all that good. The low pressure and long injector duration didn't atomize the fuel very good. The fuel pump max pressure was maybe 20 psi. About the only way to know what unregulated pump pressure actually is, is to dead head the pump with a pressure gauge installed. I worked on those systems in the '80's and early '90's, and they were nothing but trouble.
 

Ele115

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I thought he was converting to 2 barrel and using a regulator?
 

mopops

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The old CFI and TBI fuel injection was low pressure. Usually in the 11-14 psi range. They used low pressure pumps. Biggest reason they didn't work all that good. The low pressure and long injector duration didn't atomize the fuel very good. The fuel pump max pressure was maybe 20 psi. About the only way to know what unregulated pump pressure actually is, is to dead head the pump with a pressure gauge installed. I worked on those systems in the '80's and early '90's, and they were nothing

I thought he was converting to 2 barrel and using a regulator?
I am
 

mopops

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I was just attempting to answer the original question about the tbi fuel pump pressure.
this all started when i went to buy a regulator, parts guy wanted to know pump out put some reg s dont handle hi pressure to 4psi. i am trying to get all parts needed before i disable car in driveway. iam haveing major surgery soon so iam trying to get this car movable before that tks to all for the help , your a great bunch of guys but most mopar guys are
 
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