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Guest Message by DevFuse
 

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how much fuel pressure should be?


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9 replies to this topic

#1 moshem74

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Posted 03 December 2004 - 02:27 AM

how much fuel pressure in PSI should be before the carborator in subaru leone 1600cc?
does anyone knows?

thank you for your fast answer.
moshe.

#2 Caboobaroo

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Posted 03 December 2004 - 02:51 AM

for a carburated model, there should be anywhere from 3-8psi. Fuel injected models will be about 30-40 psi depending on the car. I hope that helps!

#3 torxxx

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Posted 03 December 2004 - 03:07 AM

Fuel injected models will be about 30-40 psi depending on the car. I hope that helps!


Not true a SPFI engine should have 60-70 psi.. got that from specs in the book

#4 Caboobaroo

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Posted 03 December 2004 - 03:10 AM

Not true a SPFI engine should have 60-70 psi.. got that from specs in the book


ahhh see? I love learning new stuff everyday!

#5 moshem74

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Posted 03 December 2004 - 06:48 PM

and if i have filter king - its a filter regulator that connect on the line before the carb, can i connect it?

i can change the regulator fuel from 1 to 5 PSI, in weber carb , they say that max should be 5 psi, never more than 5 psi.
i want to know if the stronger is better?
if its from 3 to 8 on carborator than 8psi its better to have all the time no?
can i connect this malfasi fuel filter regulator and leave it on 4 psi?
i have this fuel pump for better performance:
Posted Image
P/N 99009.131
Electric Fuel Pump

and i want to know if i can connect this one on the line and adjest it 4 psi:
Posted Image
99901.419
Filter King adjustable fuel pressure regulator and fuel filter
http://www.pierceman...com/linkage.htm
http://www.freewebto...uelpressreg.htm

thank you all .
moshe.

#6 moshem74

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Posted 05 December 2004 - 03:00 AM

hi
if the fuel pressure should be from 3psi to 8 psi , it's mean that it's better to have 8 pssi all the time or what?
if i connect fuel pressure reguator before the carborator, how much pressure i need to adjest it?
thank you.
moshe.

#7 canajun2eh

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Posted 05 December 2004 - 06:09 AM

I'd start with the Weber specification. You tell us that their specification is 1 to 5 PSI, and never more than 5. This means that the carburetor will malfunction if the pressure should exceed 5 PSI. I think this would mean that the fuel shutoff valve in the float chamber will not work properly at higher fuel pressures, causing flooding.

Therefore: 4 PSI should be OK. I wouldn't go any higher.

There's no reason why you can't put that fuel filter near the carb. That would make it easy to clean or replace the element. It would also ensure that any rust that might be in the existing fuel lines would be properly trapped by the filter.

I would install the new fuel pump where the original one is: under the car, near the fuel tank. That way, you can be sure that it will prime properly.

Get rid of the filter and pressure regulator that are in the existing fuel line near the pump. You should be able to use the existing wiring -- cut off the wire at the fuel pump so that you can use its connector for the new pump.

#8 moshem74

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Posted 05 December 2004 - 06:29 AM

o.k. thats what i'm gone do .

and another thing:
can i take out the fuel filter that is under the car in the back? it's connecting before the fuel pamp, mabe it's there because it wont let the rust to go in to the fuel pump and damage it, mabe it's better to leave the originat fuel filter in his place???

thank you for your fast answer.
moshe.

#9 torxxx

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Posted 06 December 2004 - 04:20 AM

you need a filter before the pump, or say goodbye to your pump

#10 moshem74

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Posted 06 December 2004 - 07:56 AM

got it.
o.k. thanks.
moshe.




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