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Old 09-21-2006, 06:46 AM
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Paxton super charger question.

A friend I work with bought a(used) Paxton supercharger system for his 93 (5.0)Mustang. It is calibrated to produce 12 psi of boost. Does anyone know if he will need to upgrade his stock injectors or fuel pressure regulator?? Thanks!

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Old 09-21-2006, 07:46 AM
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Injectors for sure and likely the regulator, fuel pump and fuel lines as well. We have done 4.6 liter Mustang motors with Superchargers and wheel HP'ed over 600, well beyond stock fuel system capacity.

What he should do is call Paxton with the blower model number and get the HP peak for that unit and size the fuel system for that. 12 PSI is quite a lot of boost for the street.
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Old 09-21-2006, 07:26 PM
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I'll agree in that am adjustible regulator is in order...Kirban being my favorite and that you should install a 255LPH fuel pump, but the factory fuel rails are good to at least 500HP and there are more than a few pushing 600hp. You might go to SN 95 factory fuel rails as they flow 40% more fuel than the stock '87 to '93 rails.

Go to 42lb injectors and a Pro-M Maf calibrated to them.

After that a custom tune on a dyno is needed or A wide band O2 setup with datalogging to suppliment am EEC Tuner, Tweecer or other tuner.

Or, just install it and blow headgasket after head gasket...
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