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Does upping fuel pressure increase performace?

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Old Mar 14, 2010 | 10:47 AM
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Does upping fuel pressure increase performace?

so i figured this would spawn a good debate becuase there seems to be a huge difference in opinion in this matter. On a efi motor if you up the fuel pressure will it increase performance???
 
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Old Mar 14, 2010 | 11:01 AM
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No it doesn't and anybody that says it does is wrong.

How's that for an opening.
 
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Old Mar 14, 2010 | 11:50 AM
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On a NA engine, no. you will run rich and decrease performance. On a forced induction engine, along with increased boost pressure, yes. You always need more air with more fuel.
 
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Old Mar 14, 2010 | 03:32 PM
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Upping fuel pressure with forced induction is still a band-aid for a lack of proper injector sizing and tuning. The effect on performance depends on what the pressure change does for the atomization characteristics of the injectors. Increasing fuel pressure for a richer mixture is not going to give any performance advantage, as the computer will adjust the injector pulse width to compensate, bringing the mixture back to where it started.
 
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Old Mar 15, 2010 | 08:59 PM
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I think it is possible if your fuel injectors are somewhat clogged, Try it and see. If you gain throttle response you probably have injectors that need cleaning. Higher pressure may give you better fuel atomization if you injectors are restrictive.
 
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