I have a 2010 FLSTC with V&H Straightshots installed. It also has the Power Commander V installed and Stage 1 upgrade. Going to swap over to a V&H true dual system. How close will my tune be for the PC V mapping? Should I take it in for a Dyno check? Your infinite wisdom appreciated.....

 

The "true dual" system is a true performance system. It is capable of moving much more air than your current system. I don't have experience with the PC5, but you will want to recalibrate. On the V and H tuner, the map is in the file, you can modify the map with your smart phone, through the bike's diagnostic link, nothing left on board the bike to get water intrusion. Also allows you to use your smartphone for a tach, speedo, throttle position, etc, etc. As far as dyno, I would just make sure you get the right cal in it, no matter which tuner you use, and save myself the money and my bike the wear and tear. Dynos are hard on stuff.