Wideband use...

[Thower]

I am going to take my gsx to get tuned at a local shop with an AWD dyno. They informed me that they use their own wideband O2 sensor/module during the tuning process so it is not necessary for me to have one. Is this correct?
I plan on getting my car tuned(S-AFC II, boost controller, etc.) and leaving the settings that way, until further performance modifications have been made, so would there be any benefit of buying a wideband of my own?
Thanks for the help everybody. I am beginning to install my injectors and fuel pump...

 

[MrBoxx]

If you ever decide to add a tuning device of your own, a Wideband O2 is an absolute must-have modification to accurately tune your car. Even if you opt for the simplest of tuning solutions like an AFC or similar, a Wideband will tell you if your car is running too lean or too rich. A narrowband O2 gauge will not suffice for this task.

 

[Thower]

I have an s-afc II already installed, but have not gotten into setting it up, due to lack of proper fuel system(which is now going to be in place). If I only plan on getting to car tuned and leaving it with those settings, a wideband O2 is not an absolute must is it?
I may eventually get one, but if I can avoid getting one now and put the money towards a new head, I would prefer to do that for the time being.

 

[MrBoxx]

You can go ahead and get that tune from the dyno, sure, but as soon as you start to change things; fuel, air intake, turbo, boost, head, etc. (anything that changes volume of air or fuel) your tune will be off and will need to be reset. If you get the wideband now, you'll be able to make changes on the fly with your AFC on your own. No need to go to a dyno if you can already see what your accurate air/fuel ratio is.

 

[Thower]

Right on, I see what you are saying. Thanks for the advice.