A month and a half ago I installed the Auto tune accessory for the Power Commander 5 fuel manager I have had for two years now. April I had replaced the tensioners and went with S&S 510 cams. Ever since the cams were installed I noticed and was told I would see a drop in fuel mileage. Of course when one has cams in their skoot, they tend to use them more often than not if you get my dirft. My fuel milage would fluctuate from about 37 mpg getting on it now and then to a max of about 44 mpg when I drove the speed limit. That's fine, I knew it going in and was OK with that. Since the auto-tuner was installed, it has gone through about 13 iterations. I had a decent base map but every good ride I had I would accept the new suggested trims into the PC5. The AFR default was set to 13.2 AFR and for all intents and purposes that would give me a healthy dose or power and would be not all that bad on fuel economy. Today I went for what most likely will be the last ride of this year as they are calling for some good cold weather in the next couple weeks here in Southwestern Ontario. I drove sensibly. No hot *******, and did not get on it at all. Just a nice all around good ride. Outside temp was 47 deg. F so a tad brisk but with the windscreen nice. After getting home, like usual I fill up to the brim exactly every time and log my distance and fuel used. I'm now getting 54.1 mpg. That is Canadian gallons. I'm rather impressed as I hadn't expected that. So for what ever its worth the power commander and auto tuner may be pricey but this bike is running very well. Good mid range power from those cams and some great fuel mileage too.

randy

2003 Road King Classic
88 c.i. (1450 cc)
S&S 510 chain cams
Power Commander 5
Auto tuner
High flow A/C
Kerker slips with tails
V&H true duals
41,000 Km (25,600 miles)

 

Thanks for the info. Due to the price I've been quite hesitant on adding the Auto Tuner to my PC5, now you have me re-thinking it. (01 Road King here...)

 

don't have cams, but the tuner helped my gas mileage a ridiculous amount. 103 with open ac and 4.5" slip ons and no cat fp3 tuner. bike cooled down a little too. rode around today for a couple hours and barely used 1/4 tank.

 

cc Penquin, I pondered long and hard on it trying all kinds of maps but finally decided to spend the dollars. The amount of fuel you save will never be recouped but the engine will run at its optimum and that cant be bad. My 88 dances now and I'm happy.

randy

 

Very nice ride! Enjoy!

 

Have a cup of coffee.

 

Typically (that's typically), you only see these "Resurrections" (especially a Resurrection to only reply ... "Great") from Newbs

 

Canadian 54 mpg equals about 44 mpg US. Exactly what I normally get on my 2006 Ultra with the PC III. My cycle also includes many modifications that normally would reduce mileage. Did not happen.

 

 

A more efficient engine runs cooler, has better power, and (when an engine doesn't have to work as hard) better mileage.

I'd bet he found this thread using the almighty search function championed by all the old timers to all the newbs when they ask a question that was already answered somewhere in the abyss of old threads... just saying. (sorry, I had to be a smartass. I don't mean to start anything)