You cant do a custom dyno tune without a piggyback.
Wrong. Wrong in many regards.
Also, piggybacks cannot accurately adjust the low-medium throttle and the off throttle fueling where the ECU is switching to two references as opposed to just throttle. Long story short, a piggyback can only accurately tune at over 10% throttle input. Anything less and the fuel references change internally inside of the ECU and are constantly fluctuating and will not always be the same. So if you're at say 8% throttle and 3000 RPMs; that reference point used by the ECU will not always be the same meaning while at some points in time, the values input into a piggyback will be on, most of the time they will not as either manifold or ambient pressures are changing constantly on the fly and BOTH of those determine what the fueling is doing off throttle and up to 10% throttle. The only way to accurately tune that range is to edit those reference cells specifically - which a piggyback cannot do.
OP; If you don't know what you're doing but want to have the option to tune it yourself, I advise getting the Log Box as it will see what the exact AFR is and retune it for you. It is pretty much idiot proof and there are a lot of downloadable maps for you to play with, change, retune or mess with in developing your own mapping.
If you don't want to do it yourself or are afraid of it, I advise bringing it in and having it tuned through the ECU for you by a tuning shop if you need suggestions, open a ticket up on the Woolich Racing website (Woolich Racing Support Ticket System
) along with your ZIP code and they can make suggestions.
If you feel comfortable sending out your ECU, send it to Nels @ 2 Wheel Dynoworks (https://2wheeldynoworks.com/
) and they will flash the ignition, ETV tables and other changes along with enabling auto blip for you and send it back. It won't be a 100% dialed in custom tune, but if you check their changes on the dyno and you and your tuner feel there is more to be had, then you can fit a piggyback and retune; just remember that a piggyback will only accurately tune at 10% or more throttle input.