Engine/Transmission (1994 - 1998) Installed DDP2's, What else to adjust?

[charlessmith]

In my '96 2WD 3500, I have 16* timing, and a #5 fuel plate done by Enterprise Engine Performance. The '96 would get just over 23 MPG at a very steady 65 MPH, usually running an exhaust temp a hair under 600F.



I just installed DDP2 injectors in this truck, and have not really determined fuel mileage yet. But, I'm seeing EGT of 650F or a little more. I had to adjust the idle a little higher to prevent stalling. The DDP2s have . 020" gaskets, and the 180s that came out had . 060 gaskets.



My questions are, what else do I need to adjust to see the best mileage improvement? I assume that I need to get the cruise EGT back down, probably with another half degree or degree of timing? Should I have used the . 060 gaskets? I know I need to play with the AFC to make it easier to roll off a start without making clouds of black smoke. Before this install, I could drive smoke free unless I really put my foot in it.



On the good side, hp/tq went from 264/780 to 355/970

 

[hsmith]

Hey charlie, I am working on the same thing. Mine is a manual, and running the same sticks. Tinkering with the AFC a tad, but mostly control my smoke with the right foot. Runs too good to do much to it. I would probably screw it up.

 

[Shell 96]

well i know you are looking fpr more mileage but a rack plug and afc foot mod would def give you more power went from 334 to 363 for the $12 part.