Two weeks ago, I put in the Power Commander. The first check of the milage said I was getting 32 MPG. Not good.
This past weekend, I tweeked the map, and was back up to 40 MPG.
I feel better now. First reset the zero throttle, thenreduced the 5 and 10% numbers in the 2500 - 3500 RPM range by 2-3.

 

Reduce the values from 2k-3k @ 5-10% to "0". If the 20% numbers in that range are >5, cut them in half. Watch oil temps and any other sign of an over-lean condition (detonation, surging, pipe discoloration), but you shouldn't have any if you have an oil cooler and run synthetic oil. I've been running "-5" in those areas for about six months with no problems, but just yesterday bumped them up to "0", also increasing ignition advance to "+5" in the same range ("+3" for 20%). Advance was at "+3" at 5-10% only. This is where I was last summer. I'm getting a low of 38 (mostly city, numerous cold starts) to 50mpg (55-60mph on the backroads).

 

This is just up my alley cuz I've been wanting to tweak my PCIII also for some time and am now looking to do this but never done it.

I'm getting 30-31 mpg and know it can do much better.

iclick:

I'm running a stage II type setup with true duals, SE a/c w/K&N, supertrapps w/discs, PCIII, 10.25:1, 211SE cams...

Do I tweak things the same as you guys are talking about above or what would u suggest? I do 95% freeway commuting at a smooth 2900 rpm and am looking for MAXIMUM mpg's, not looking for power I want MPG's. Your input would be appreciated!

 

You seem to be one ofthe gurus for the PC111. If you are not running an oil cooler and live in a hot place, Central Florida, how would suggest the numbers be tweaked so that you get at least 40-45 mpg?

 

You can just lean out the values for the throttle range of 10 & 20%. On my Fatboy my throttle is at about 15-18% at 2800 RPMs at 70mph. If you just lean that small area your Fuel milage will go way up. You do not need to lean out the whole band just Throttle position you are cruising at. That way your system will still dump fuel into it when you want to GO. You can also play with the accelerator pump setting so when cruising you get an extra shot of fuel to prevent pinging. I am using 85% sensativity, 8% Shot, 25 Revs. I read if you go to high on the fuel shot you will go over rich and bog the motor.

 

No, my tweak is only for stock 96" engines. The 203 cam will force an entirely different set of values in the cruise range, and I wouldn't know where to tell you to start. I would guess your values are much lower than mine in the cruise range, probably between 0-10, based on what I've seen with a dynoed PCIII on a 96" engine with Andrews 26 cams. You could try reducing the values in the cruise range (5-20% TP @ 2k-3k RPM) five at a time until you start feeling some surging, hearing detonation, or your oil temps climb higher than normal. If you had access to a A/F gauge, try to put the A/F in the 14.2-14.5:1 range for cruise.

 

I sent you a PM iclick...

 

My '07 is at about 8% TP up to about 60mph, 12% at 70mph with no headwind. For some reason TC88's show a higher TP at these speeds. For that reason, I've tweaked mine from 5-10%, and not quite so lean at 20%. If 20% is leaned too much on my bike you can sometimes feel a slight flat spot at roll-on. How far have you leaned yours in the cruise range?

 

I feel like a guru for my bike since I've spent numerous hours tinkering with it using my scientific seat-of-the-pants approach, but am nervous making recommendations to others with different configurations. My personal opinion is that any TC needs an oil cooler, and if you don't have one I would at least install some sort of oil-temp gauge to monitor the engine's status if you plan on leaning the A/F more than a bit. As A/F is leaned the head temps increase, as does oil temp as a consequence, and if not controlled you can overheat the engine. Even running a very lean map last summer I've never had oil temps exceed 230°, and that only twice in 95° weather and in heavy traffic. How high that would go without the cooler is anybody's guess, but it would definitely be higher--probably on order of 250° or so, which is outside my comfort zone for oil temp. Others would find this acceptable, but it's too high for me. I don't even like seeing 230°, even though this engine never exceeds 205° when moving.

I have my PCIII map tweaked quite lean in the cruise range and I get relatively good mileage for a TC96 (38-40 mostly city, 50 max on the backroads, in between for everything else). I've tweaked the cruise range as per this thread (https://www.hdforums.com/m_2893742/tm.htm, scroll down 21 messages) and have no over-lean issues with my bike. I run synthetic oil and an oil cooler. To confuse things even more I also have a map switch with multifunction hub installed for the PCIII, allowing me to toggle two maps on the fly. This is overkill IMO and I rarely use the rich (original Fuel Moto) map tuned for optimum cooling. It does help, but for $150 I wouldn't recommend it. To confuse things yet further I've recently installed an oil-cooler fan setup that I fabricated from scratch, and I did a write-up just recently that showed almost no interest from anyone else. No word yet on its effectiveness, but it should help at least some.

You have an '07 like mine so you're at least in the ballpark for making tweaks like mine. Using the thread I mentioned above, try making the changes as in the JPG attached to the message, except instead of using "-5" in the blocks having that value, use "0" instead. I've made that change to my map and also increased ignition advance in the cruise range even more than before (+3 to +5°). If you make this change in the A/F you should see no adverse side-effects, but keep an eye on oil temps and other indicators as mentioned in that earlier thread. I'd like to know how your oil temp goes as weather gets hot without a cooler. Please email or PM me with updates. If you change the ignition advance, listen for detonation, and if you hear any back off on the advance a bit at a time 'til it goes away. More advance will increase mileage and improve cooling if no detonation is present, but since modern HD's have built-in ion-discharge knock sensors it should remain in control.

 

I am just leaning the MAP in the Cruising Range between 2500 and 3000 RPM on the expanded map and 10 and 20% TP. I just (last Week) lowered the numbers from the map loaded when it was Dynoed Last year. I went 2 -3points down in the RPM range. So far My milage has gone from 35mpg to 40mpg. I have not yet hit the sweet spot. Can not remember off hand what the map setting right now is will get back to ya. I am going to lean it some more since my oil temp when cruising is still below 220 deg when Air temp is 85.

I have found though if I lean out the numbers below 10% I start to run HOT So I am going to leave that on the rich side.

I read in another thread that you installed the HUB on your bike. how is that working for ya? The HUB will be my next fuel system upgradeI am also looking at adding the LCD and the WB2 when it comes out.