it's all about the fuel pressure, if you run 19's with a big setup you have to flow higher fuel pressure (not too high or your rails won't handle it). and if you are running 24's with a stock setup then you will need slightly less pressure than stock to run fine. This is all in theory anyway, since I have no experience with tuning injectors and fuel pressure. But I do believe I'm right.
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'02 Explorer XLT 4.0L --Nice Vehicle
'97 Saturn SL1--Soon to be ditched for a Ford!
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