tell us more please............
Dan (Final GTS) sells the package as does Sean Roe. It really is simple it virtually controls all aspects of the PCM. Some of the obvious parameters are, a/f, timing, idle, fan on/off. You can tune both the closed loop and WOT, which is very difficult with a VEC. You also eliminate the inherent delay and possible hesitation associated with the VEC.
If you are knowledgeable you can buy the Pro Racer package and do it all yourself.. If you want a tuner to work on your car you only need the interface, which can be programmed and then used to download the tune to the PCM. Again, Again Dan is probably the best source.
I find it interesting, because I can see the factory base tune. When you see what you are starting with, tuning is a lot easier. I am going to post one of the pcm tables very soon. That table is the a/f adjustment for IAT. A lot of viper owners are trying to maintain a consistent a/f under different temperatures. To do such they are using an offset based on IAT. This table shows the factory multipliers for IAT.
Another interesting point is that when you are tuning for a/f you are always guessing at how much fuel you must add or subtract. That calculation is based upon what the base injector pulsewidth is. You now know exactly what the factory pulsewidth is at WOT, therefore, making the tune process much quicker and accurate. There are general calculations that can approximate base pulsewieth, but, I was not close until I started using SCT.
