Howdy folks.

I recently installed a PCIII, Supertrapp slip ons (aka Screaming Eagle) and K&N high flow intake on my '06 SE Ultra (103ci). Before the install my mileage was right t 39 mpg. After the install it has dropped to 30. I contacted Jamie at Fuelmoto (who is great, BTW - bought all my stuff there) and he gave me a map to improve mileage but it only brought it up to about 32mpg. I'm heading across Alaska at the moment and that kind of mileage really sucks with some fuel sttions being far and few between. (The good news is that the bike runs like a bat out of he$$.)

Can anyone give me any advice on how to tweak my mp to get my mileage back up?

Here's the map Jamie last gave me:

000000000
1000000000
1036000000
1013823210000
02518222436322431
01825261517293436
0178126-11-5-4-8
015821-9-10-1-2
001420214-569
00201723531213
00219271221014
002815231661721
000202221111925
00020181661515
00013171271311
0001415117119
000201014101213
000232023171312
00001515161310
00001218181412
0000171916128
00002127241721
00002231222022
00002224131922
000000000

Thanks all,
Dave

 

It's for a different reason than mileage, but I was just this morning giving some thought to yanking the O² eliminators and hooking the sensors back up to the system (for test purposes). I'm thinking I shouldn't be afraid of going too lean from less-restrictive peripherals since the Delphi will no doubt be trying to trim fuel that the PC is adding.

You might try it and see if you can recover your mileage at cruise speeds.

The only downside I'm thinking there will be is the idle engine temperature will go back up to the stock levels.

 

could part of your mileage drop be attributed to a little overexuberance on your throttle hand? before i installed my pciii i was getting 40 mpg. after install, 39 mpg. and i don't ride like grandpa either.

2007 road king custom
se ac
vance and hines big shots

look for a post by iclick. he has been tweaking his pciii maps and has gotten quite good results.

 

With due respect to Jamie, his maps tend to be heavy on the fuel in the take-off and cruise ranges if mileage is your chief concern. The upside to this is better cooling and the downside is decreased mileage, but adjusting the map leaner in selective areas shouldn't affect performance as long as you don't alter TP's above 20%. I have a 96" SG, a different animal but not radically so, and get 40-50 mpg (city-highway) with PCIII, Rush 1.75, and K&N. Over the past eight months of ownership I've been tweaking the PCIII map provided by Jamie and have had to accept some compromises.

Not to confuse things, but I have two maps installed in the PCIII, switchable on the fly using the Multi-function hub and map switch. I've attached two maps, the original canned map (PCIII-2a) and my latest tweak (PCIII-2e) for Map 1. The important areas for gas mileage is the take-off (1-2k rpm @ 2-20% TP) and cruise (2-3k rpm @ 5-10% TP) ranges. As you can see, I've leaned these areas considerably over Map 2a, but have leaned 20% TP in the cruise range relatively little, and above that point not at all. Be careful leaning 20% TP too much in the cruise range as you may feel a flat-spot at roll-on. I've only leaned that area about 1/2 and haven't had any trouble, but going more causes this flat spot.

I didn't attach Map 2 in the PCIII because it is rarely used and isn't relevant to mileage, but is used only in traffic when oil temps increase. For that map I've added fuel to the take-off and

 

I agree with iclick. I have the same mods as you Supertrapp SE (sames as H-D SE) K&N RK3909 HF air filter and true dual headers. The "canned map" from Dynojet was actually quite a bit off. The bike seemed to run well but the fuel mileage really suffered. I started doing some tweaking focusing my attention on particular TP and RPM zones and making what I thought were appropriate adjustments. I now have it dialed in quite nicely and the dyno sheet shows a nice linear pull in horsepower and torque. Not record setting but very linear. I just finished a trip on a full tank of gas, mostly highway and about 25% local. I got 46 MPG on that tank of gas.
I don't have the multi funtion hub like iclick (wish I did) and just added a few % to the low RPM and TP settings to help cool it down in the summer heat. Traffic situations can really heat things up. I don't expect any real change in fuel economy as I didn't mess with my settings in the cruise range.
BTW mine's an otherwise stock 88" and if I run 65-70 MPH I get mileage over 45 MPG. Once I push it to 80 it will dip to around 40, so the right hand does have a lot to do with fuel economy.

 

Unfortunately with the O2s eliminated, you're always going to lose some level of fuel economy because you're working off base tables and the ECU is not able to trim/add fuel based on the readings from the O2 sensors. If the fuel milage is a large concern and you also want maximum power, you generally need an ECU controller that integrates the O2s or you're going to have to adjust the maps yourself to make up the difference. This doesn't mean you can't get pretty close though with the PCIII, it just means that you are going to need to lean (pun intended) on the advice like forum members iclick and StrGlide have offered to try to get your maps where you want them. Best of luck with your tuning!

Drel

 

He's got an '06. There are no O2 sensors. The stock system is open loop.

 

Didn't the '06 have a single sensor on the front pipe?

Anyway, disregard my earlier suggestion. I take it for granted everyone's got an '07 like mine for some reason...

I did try sticking the sensors back on-line last night and it works okay. I'd wanted to see if my suspicions were right about having an injector not quite working right. It's been running roughly the last few days but everything else I can check (compression, etc.) is okay. It smoothed out considerably with the main ECU getting feedback from the sensors. I presume (and hope) it's just a matter of some bad gas I'd gotten.

 

No, I don't believe it did. Mine doesn't but it's an '06 88".

On the 2007 models with closed loop or shall I say limited closed loop the closed loop band is very narrow. It's narrow enough to completely control AFR at the speeds that EPA wants controlled. Outside that narrow loop you are stillrunning an open loop system. The reason why Dynojet puts the O2 sensor eliminators is to trick the ECM into thinking the AFR is where it should be during those engine speeds and TP controlled by EPA standards. If it didn't do that the ECM would keep trying to change the AFR effectively changing the signal to the fuel injectors.

 

I have an 07 Ultra, have a set of SE 98B slip ons coming in, plan on the K+N Kit and a PCIII. Sounds like I should just have the 2e table put n then and see how it does?

mps