Power Commander

So I am running a Power Commander II. I am trying to get max MPG out of my bike as I am commuting 50 miles a day with it, plus have some longer rides planned. I'm changing out the spark plugs hopefully this week. For the Power Commander II, I have it programmed to my mods (intake, exhaust, etc.). Is my MPG going to be better running in this modified state, or should I put it back to stock?

 

Anyone?

 

I love my PCIII because, properly tuned, it cures most common problems with the 6gen VFR and am willing to live with a few miles less per gallon to enjoy that benefit. I can't be certain on a 5gen running a PCII, but if you're after max mileage and are willing to sacrafice those benefits, then I would simply remove the unit while commuting and re-install when you feel like you want to get after it. You may want to consider a dyno-tune as well. As long as you keep your rpm's down, you should be able to get around 40mpg without ever having to uninstall the unit and the performance benefits will still be there when you want them. With you current generic set-up, you could very well be running a rich mixture.

 

Thanks, hav! I am currently getting a lot of popping/backfire? on decel. It's not annoying or anything, but I assume the mixture is burning off further down the pipe than normal. Do you think this is due to the current tune for a slip on/exhaust versus going back to a stock tune? I just ordered some new spark plugs as well, so I hope that boosts MPG a little bit as the originals are still in there I assume.

 

More than likely, it does have something to do with your mapping. Sometimes popping can also be a sign of a lean mixture. In my case, my bike popped a lot prior to a dyno-tune; which proved out the bike was running very rich and burning off excess fuel in the can. Perfecting the mixture (leaning it out) solved the popping issue. I'm not sure how many miles your exhaust has on it, but it could be that it needs a re-pack.