So I have this crazy idea.
Been thinking about this FiTech setup for tuning carbs.
FiTech Go Tune AFR Basic and Power Adder Systems | FITech Fuel Injection
Its cool & everything but I have one more feature that they need to add, and have a call in with one of their engineers to discuss it.
Since the blowthrough carbs have the powervalves referenced to the hat, why not external reference them instead and control them with this 02 sensor setup so that it chases a target A/F ratio?
Would be a regular carb while idling, cruising under vacuum , but once any boost pressure is present have this controller take control of the powervalve system and keep it at a plotted a/f ratio all through the boost curve.
Plot an a/f ratio curve on a map of 1psi-30psi, then make a pass, overlay the two, commanded & observed to make sure it does as commanded.
I talked with Rodger @ C&S, he said the PV's are variable so should work just fine, although might want to add spring pressure to the PV's so that they are a little less sensitive. He says the stock spring go from closed to open with less than 1 psi differential, so adding a 10psi spring so it actually takes 1-10psi to go full open might make more managable.
Also talked with Sebastian from AMS , their AMS2000 will do what I am asking. Its just to expensive.
So what you think? Set Idle - and cruise a/f just like any other carb, but have computer take over the powervalves when under boost. No extra wires, sensors, none of that BS, unhook one boost line and its still just a carb.
This FiTech setup already data logs everything, controls timing in reference to A/F-ect. and has 02 sensor.
Just needs one more option.