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GJF GJF is offline
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Join Date: Dec 2004
Posts: 809
There should be no difference if you take it from the regualtor or the fuel rail. As long it is the same circuit as both. Why would you say crude. With the signal form the plenum the FPR see's any change in the engine. Air density, barametric pressure, air temps which directly affect charge temps directly affect engine performance. With running the plenum signal this helps automatically adjust to the conditions the vehicle is in at the present time. As long as your base map is at the correct AFR's and your timing is happy it will all work in harmony. The MAP sensor helps with all these differences. Therefore the fuel has to match the changes the the MAP see's. If you run with a fixed fuel pressure the ECU has to work the injectors harder and not be able to match performance with the changing outside conditions.
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87 911 Carrera platform
Twin Garrett's, Big Valve, Xtreme Cylinder Heads, JB Racing cylinders and machine work, custom JE pistons, GT2 EVO cams, GT3 oil pump, modified 3.2L intake, 80mm TB, custom Intercooler, equal length headers, DFI, KEP Stage 2 custom twin disc, G50 custom gear set, LSD, Tilton trans pump, Fluidyne cooler
Old 08-16-2008, 03:30 PM
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