Stock Fuel Pressure
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Joined: Sep 2001
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From: Ventura, CA
That will vary depending on how much vaccumm you are pulling at idle... Depending on the cams used it can be all over the place...
It will definetly be less than 39psi though
Its best to just pop the vaccumm line off and check / adjust it.
-Dale
It will definetly be less than 39psi though
Its best to just pop the vaccumm line off and check / adjust it.
-Dale
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Joined: Jul 2001
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From: Nashville
Originally posted by racetested
What will the pressure rise to when at full boost and WOT?
What will the pressure rise to when at full boost and WOT?
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Joined: Mar 2000
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Originally posted by Dale-01L
That will vary depending on how much vaccumm you are pulling at idle... Depending on the cams used it can be all over the place...
It will definetly be less than 39psi though
Its best to just pop the vaccumm line off and check / adjust it.
-Dale
That will vary depending on how much vaccumm you are pulling at idle... Depending on the cams used it can be all over the place...
It will definetly be less than 39psi though
Its best to just pop the vaccumm line off and check / adjust it.
-Dale
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Originally posted by easterisland
That depends upon the boost. A truck making 8lbs at full boost will have less pressure than a truck making 30lbs. Some trucks at WOT are not making full boost so at WOT so it is hard to say what the fuel pressure would be at WOT.
That depends upon the boost. A truck making 8lbs at full boost will have less pressure than a truck making 30lbs. Some trucks at WOT are not making full boost so at WOT so it is hard to say what the fuel pressure would be at WOT.
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From: Nashville
Originally posted by jarmstro
How are you suppose to adjust it? the Lightning's do not have an adjustable regulator.
How are you suppose to adjust it? the Lightning's do not have an adjustable regulator.
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From: Nashville
Originally posted by racetested
I may be thick headed here but I am under the impression that a forced induction motor increases fuel pressure as boost rises to supply enough fuel through the injectors. This would be done because less vacuum is present at the regulator and it stays shut to allow less fuel to return. Or does the L have the injector duty cylce change instead?
I may be thick headed here but I am under the impression that a forced induction motor increases fuel pressure as boost rises to supply enough fuel through the injectors. This would be done because less vacuum is present at the regulator and it stays shut to allow less fuel to return. Or does the L have the injector duty cylce change instead?
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Joined: Oct 2001
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From: Florida
My 03L and my 01L both have / had fuel pressure gauges on them all the time once I installed my lower pulleys. The fuel systems where untouched (stock pumps, lines, injectors) and both trucks where making just shy of 15psi unless it was very cold out.
At idle you should be seeing 32/33psi, My current truck goes to about 54psi at WOT and stays there. Both trucks were holding A/F ratios in the low 11's BTW.
Bob
At idle you should be seeing 32/33psi, My current truck goes to about 54psi at WOT and stays there. Both trucks were holding A/F ratios in the low 11's BTW.
Bob
