Okay i got an afc, it is hooked up with the Corbin boost mod. Now i cannot tune based on throttle position. what if i got another afc and used it for throttle position tuning soooo i would have tuning based on boost and throttle position. anyone ever do this? i wonder if it would work.
thanks
james

I wouldn't worry so much about non boosted conditions. Unless you want to get every ounce of HP you can get, there's much more you can do with your money just by concentrating on the boost.

For my boosted conditions, for instance, my EIC only adjusts accorbing to RPM and boost. The same thing now holds true for you.

Just spend your money on bigger injectors or a new intercooler. :-)

i have a hahn fmic an i have 440 rc's
the thing i am having trouble with is that during vacuum condition i have no problem with the tune of the car. it is when the car is boosting and varying load conditions that i cannot always get an ideal fuel mixture. the way i see it is with the afc we are tuning with throttle position x rpm or boost x rpm. wouldn't it be way better if we could tune throttle position x boost x rpm. hell i better just get a standalone!
lates
james

Well, I have 4- 440cc injectors as well. However, they are my EXTRA injectors. They are being tuned by an EIC 16 x 16 matrix using only rpm and boost points. With my setup, I feel like my state of tune under boost is awesome. The off boost operation is also just as nice as is on boost. (I'm having one issue right now that is irrelated to its tuning operation) Plus, besides feeding the EIC an injector "gain" number, it already came with a built-in MAP that I'm free to adjust as I please. I'm guessing the MAP it came with is just a linear scale in reference to boost/rpm.


Although throttle position is a somewhat important query, theoretically, rpm and boost queries should be enough. No matter what your throttle position is, your car should only be able to produce so much power at that particular rpm/boost point. Hence, at least in my own mind, seeking out throttle position as that all important additional tuning point is somewhat optimistic, and probably wouldn't make things much better. If you do have your S-AFC set up as well as you think you can make it, perhaps you're just reaching the S-AFC's limitations. (to me at least, the SAFC seems like it is a very limited device, especially coupled to our factory N/A cars; I hate the fact that it's basic fueling functions are nothing more than trickeries to your stock MAP sensor, similar to that of a FCD, and we know how popular those are)