If you're going to run with anything larger than the 24#, you will need to have
the PCM reprogrammed.
On the MAP sensor, I don't change any resistance, the dual-POT thing was
really "hokey" (sucked), and the "MAP Charger" is getting ready to undergo the
(hopefully) final testing at the track and, next week, at the dyno.
You really don't want to mess around with the MAP signal too much...especially
with a static resistor. The MAP needs to see changes (on a linear basis) at
all times (except for under WOT acceleration...that's 0-1"hg). I had thought
about putting a resistor inline to slow down the voltage signal to the PCM,
then tried it and threw that idea out the window.
Do you actually have any data on what the A/F ratio looks like across the
entire RPM band...and especially where you're having the problem at?
- Bernd
> Now for the injectors. The stock 19# injectors I want to give the axe,
> and install the 30# ones in their place. Problem being that I'm not willing
> to dish out hundreds of bucks just to have the PCM reprogrammed, so I'm
> looking for a way around it. At first I was going to run the return line for
> the super fmu straight to the tank, and use the fmu to control base line
> pressure, then just lower it to compensate. Then I realized if I do that,
> it'll screw up the fuel spray pattern and ruin my idle, so i canned that
> idea. My idea is to attack the MAP sensor, perhaps finding a value of
> resistor that I can use to reduce the injector-open time. With a static value
> the curve in the MAP will be retained, just lower it enough to close the
> injector at an acceptable time. I figure I can use the FMU to adjust the fuel
> curve any further. My only goal is to get something in there that isn't
> almost at full duty cycle, and I don't want to buy 24# when I got 30's
> already in my garage.
> Got any interesting ideas on what value we can use?? What about that
> dual-potentiometer package you posted awhile back?? Did you ever try that
> out?? Lemme know what you got.
>
> -Austin
> Vipertruck
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:59:33 EDT