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Jeff Chambers · 01-31-2005, 12:57 PM

A speed density system is going to keep firing the 24# injectors for the same amount of time (injector pulsewidth). You could have someone like Autologic burn a chip that would compensate for the increased injector size, but SD just isn't that accomodating to overall changes. A guru like Mike Wesley might say otherwise, but for your basic layman its a tough system to tune with.

You could try lowering your fuel pressure to compensate for the 24# injectors, but don't go too low or you'll risk affecting the fuel atomization.

01-31-2005, 12:57 PM	#8
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Tuning Issues, I am out of ideas A speed density system is going to keep firing the 24# injectors for the same amount of time (injector pulsewidth). You could have someone like Autologic burn a chip that would compensate for the increased injector size, but SD just isn't that accomodating to overall changes. A guru like Mike Wesley might say otherwise, but for your basic layman its a tough system to tune with. You could try lowering your fuel pressure to compensate for the 24# injectors, but don't go too low or you'll risk affecting the fuel atomization. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"