Thanks for responding drdisque!
I guess I am more worried about the sentence before the OE sensor piece. This is the entire paragraph 14.10.F :
F. The engine management system parameters and operation of internal
combustion engines may be modified only via the methods listed below.
These allowances also apply to forced induction cars, except that
no changes to standard boost levels, intercoolers, or boost controls are
permitted. Boost changes indirectly resulting from allowed modifications
are permissible but directly altering or modifying the boost or turbo controls,
either mechanically or electronically, is strictly prohibited. Traction
control parameters may not be altered. Any OE OBD2 or newer communications
port functionality must remain. The Check Engine Light (CEL) or
Malfunction Indicator Light (MIL) may be disabled via software.(1) Alternate
software maps which violate these restrictions may not be present during
competition, regardless of activation. (2)Only OE sensors may be used for
So, I use my Emanage for logging the AFR. The EMU has a map which would be able to modify the fuel maps based on this signal(A/F Target Map). I don't use this map at all... all my adjustments are based on my interpretation of my logs, but the map exists and there is no way to remove it from the unit. If the statement labeled (1) above only applies to the restrictions before it in the paragraph(no boost level adjustments, no traction control parameters, OBD2 port still functions) then I am all set. Statement (2) comes after statement (1) in the rules, so I think everything is probably good.
I'll go with that and see what happens, I won't be in a position for anyone to want to contest my setup(ie. haven't won a single race yet) but I'd rather know I'm within the rules so if I ever do win, my setup is beyond reproach.
Worse case scenario, I remove the wideband before events and plug the bung just to be safe.