Hiya, Ken.

I'm running a Delta 2-stage chip from Motorhaven right now, and have some questions regarding a supercharging project. I'm in the information-gathering stages of assembling a supercharger for my truck, which has a mechanical returnless fuel system. My current thinking is that I'd rather not convert it to a return system with a FMU or pressure regulator, but instead use a custom program with my current chip for remapping fuel delivery.

My question(s) have to do with what kind of information you need for the custom program, and just how adaptable a new burn will be.

I'm anticipating this as being an on-going project--to begin with I'm only planning on running 5-6 pounds of boost, and I can stick with my stock 24# injectors and stock fuel pump at that low boost level. If everything works okay, I may then decide to get a little more ambitious and upgrade to 30# injectors and a bigger pump to accommodate the fuel demands of higher boost. Would I need different programs based on the injector size, or would one for the current 24# injectors also work with the 30# injectors? I'm looking for cost-effectiveness, here; I could also install 30# injectors and a new fuel pump from the beginning, and just run low boost with them until I get a little more confident. If I went that route, would a single custom burn work for low and high(er) boost levels, as it would be working with the same injector size regardless of boost?

Also, I might at some point install an aftermarket MAF and possibly a new throttle body; would chip programming need to be changed for either/both of these, as well, or would they take care of themselves?

Finally, what do you (or, rather, does the EEC/chip) base fuel delivery on? Manifold air pressure? RPM?

Thanks for any and all information!

 

my local dyno shop only works on fords when he sc's them- bigger injectors, no fmu custom burnt chip based on air fuel ratios - this is the best way he has tuned for maximum safe hp-also bigger capacity fuel pumps