Yep, have my exhaust but was going to wait on the AC until I could afford a PCV... Now I just might get the AC anyways, and see how she does.

 

The answer is it depends... The narrow band O2 sensors will allow the ECM to adjust the AFR to a limited degree from a reference baseline value. The normal AFR adjustment range allows the motor to handle the changes in elevation and temp you'd encounter while riding i.e. Summer, Winter, sea-level, mountains etc... Once you start changing the airflow you're already tapping into the available adjustment range i.e. you've moved further + or - from the baseline than before the mod, you may or may not encounter conditions that fall outside of the remaining adjustment range. The benefit offered by re-tuning in closed loop operation is two-fold, you can establish a new baseline from which the system can self adjust which should allow your modded a motor similar range of AFR self adjustment as availabe before the mods and you can position the baseline richer than the rather lean setting used to meet emission requirements and run the motor at a lower temps.

 

As to the reason why the answers are different between dealers, think of it from their point of view. A customer comes in and says" I have money, would you like some of it?"

Don't overly worry about the tuner unless you are willing to spend several hundred dollars for each and every 1 horsepower that you will seldom use. Ride and enjoy!

 

Since these are closed looped systems you should not have to worry about changing, adding or remapping. Think about the companies selling the power commanders, think they are going to say you don't need one? Or the dealer who all they want is your money (which isn't to say all dealers are this way).

I would take the advice offered earlier, check you plugs before, then after you change out the parts look at them again after 50 - 100 miles. If the color is the same and your not getting a misfire or popping (which you shouldn't) your good to go. I myself believe the one article that difinitively says nothing is required.

 

NO NO NO !!!!!!!! Dealers are just trying to take more money out of your pocket!!!

 

Ive seen this information before , and i do believe its true , the only reason i said i would do the tuner if i changed the a/c is because a friend of mine had short shots and an a/c on his nightster , and it ran like **** until he added the tuner , i don't think he was hurting the engine , it just didn't run well , but short shots are known to have a massive torque hole in the mid range , slip ons with a baffle shouldn't change things to much , id be interested in how things go , i like the look of my fat bobs a/c but i would like to try a free flow filter in there .

 

I ride mine hard and haven't had any problems. It runs great and never misses a beat. Even pulled a wheelie with the wife on the back! Ha. She wasn't laughing tho!!

 

what set up have you got ? pipes a/c etc , its good to here from someone who,s running well without an tuner , looks like it maybe the way to go .

 

I stopped at the dealer today. The service manager said NO tuner needed. If I would change pipes, then yes, but just mufflers and AC, NO. So I ordered a new AC. Thanks for all the replies, some very good reads.

 

Yeah, like I said, the main benefit for which I bought the tuner was cooler running temps. I don't need the extra horsepower or torque, and I don't distrust the closed loop factory unit. I just want it to run a little cooler. That's kind of important to me, living and riding in south Texas.