Is anyone running one of these tuners? And is this a piggyback unit?

 

not a piggy back. they basically retune the ecm and make it much more smarter.

 

they also utilze wide band O2 sensors vs the narrow band

 

it may be a neat tuner, but if whoever is running the dynomometer is dialing in your bike for you, and they're not familiar with it, that may pose a problem. i'm using the sepst, and many use the sert, pcv, tts mastertune, etc, which dyno guru's are familiar with.

 

there is no dyno or tuner used with the RP EMS.

 

If you do a search you will find a couple threads about people who have them. Not one bad review that I have read. I have also personally spoken with two different exhaust manufacturers that recommended the unit, especially for builds or pipes that some may find difficult to tune. There is also a nice thread on the install on the CVO site

 

I've got the new Revolution Performance EMS on the way, I will be installing it when my build is complete in about 3 weeks. I will post my feelings and findings. From all the research I've done on the various forums, there is nothing but praise for this tuner! It just works and works well, I talked to Brian at Revolution Performance and he seems like a straight shooter, answered all my questions, did not run down anyone elses tuner. I look forward to getting my bike back together and getting this bad boy installed!

 

I will be ordering one in March (compensator first). Had a chat with one of the sponsors here and am more then convinced to go with the RP EMS. No dyno and hoping to find a decent tuner is a big selling feature for me.

 

Do you have to have 18mm bungs put in your Fat cat for this tuner? And do you know whether if you have a downloaded flash already in your ecu does it matter with this tuner? Thanks

 

rev perf reflashes your ecm so it does not matter what is previoulsy flashed.