Poor MPG with TMax
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Road Captain
Joined: Jul 2007
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Poor MPG with TMax
I put a Tmax on my 07 Heritage Classice, Rush 1.75 Slip-Ons Ness Big Sucker and Andrews 37G cams. Mileage is about 31 MPG, don't really know what it was with the factory ECM and pipes. What are the rest of you getting? What maps are you running? Any suggestions on what changes to make? If you use the autotune, won't the changes simply be overwritten when it tunes itself again? Thanks
Tourer
Joined: Apr 2006
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RE: Poor MPG with TMax
ORIGINAL: bdavis385
I put a Tmax on my 07 Heritage Classice, Rush 1.75 Slip-Ons Ness Big Sucker and Andrews 37G cams. Mileage is about 31 MPG, don't really know what it was with the factory ECM and pipes. What are the rest of you getting? What maps are you running? Any suggestions on what changes to make? If you use the autotune, won't the changes simply be overwritten when it tunes itself again? Thanks
I put a Tmax on my 07 Heritage Classice, Rush 1.75 Slip-Ons Ness Big Sucker and Andrews 37G cams. Mileage is about 31 MPG, don't really know what it was with the factory ECM and pipes. What are the rest of you getting? What maps are you running? Any suggestions on what changes to make? If you use the autotune, won't the changes simply be overwritten when it tunes itself again? Thanks
Road Master
Joined: Feb 2007
Posts: 1,205
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From: Arizona
RE: Poor MPG with TMax
Franks, I think he is referring to an install that is set up on autotune. I'm not exactly sure, but doesn't the T-Max default to an AFR of 13.5 when in Autotune?
I understand what your saying that the unit can be manually set to change the cruising AFR to a more fuel friendly ratio like 14. ~ 14.2.
I understand what your saying that the unit can be manually set to change the cruising AFR to a more fuel friendly ratio like 14. ~ 14.2.
Road Master
Joined: Apr 2006
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RE: Poor MPG with TMax
All the TMAT maps I've looked at have been set right at 13.0:1 default AFR in all RPM ranges. That generally makes for a nice running bike, but not so great of fuel economy...it takes all of about 5 mins to adjust the AFR's tho. Here's how I have mine set from about 1200 - 3800 RPM.
VicW.
VicW.
Banned
Joined: Mar 2007
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From: Woodstock, Ont , Can
RE: Poor MPG with TMax
ORIGINAL: cruiser85257
Franks, I think he is referring to an install that is set up on autotune. I'm not exactly sure, but doesn't the T-Max default to an AFR of 13.5 when in Autotune?
I understand what your saying that the unit can be manually set to change the cruising AFR to a more fuel friendly ratio like 14. ~ 14.2.
Franks, I think he is referring to an install that is set up on autotune. I'm not exactly sure, but doesn't the T-Max default to an AFR of 13.5 when in Autotune?
I understand what your saying that the unit can be manually set to change the cruising AFR to a more fuel friendly ratio like 14. ~ 14.2.
Ron
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RE: Poor MPG with TMax
Cool rbabos, all the maps I'd seen previous to yours were for my 4.22 injectors & had flat AFRs.
BTW, instead of manually tweeking every single map you can just do one & then use the hot keys to copy & paste it thru the RPM ranges you want. Press F2 for a list of hot keys.
VicW.
BTW, instead of manually tweeking every single map you can just do one & then use the hot keys to copy & paste it thru the RPM ranges you want. Press F2 for a list of hot keys.
VicW.
Banned
Joined: Mar 2007
Posts: 3,706
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From: Woodstock, Ont , Can
RE: Poor MPG with TMax
ORIGINAL: Sleeps In Trees
Cool rbabos, all the maps I'd seen previous to yours were for my 4.22 injectors & had flat AFRs.
BTW, instead of manually tweeking every single map you can just do one & then use the hot keys to copy & paste it thru the RPM ranges you want. Press F2 for a list of hot keys.
VicW.
Cool rbabos, all the maps I'd seen previous to yours were for my 4.22 injectors & had flat AFRs.
BTW, instead of manually tweeking every single map you can just do one & then use the hot keys to copy & paste it thru the RPM ranges you want. Press F2 for a list of hot keys.
VicW.
Ron
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Road Captain
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RE: Poor MPG with TMax
I live in Seattle, so it is cool and traffic, even on the highways is frequently stop and go; there are also quite a few hills. My AFR settins are at 13.66 (front) and 13. 80 (rear). I am planning on some cruising on I-5 just to see what the fuel mileage is at 60 MPH. I tried map 401 but had some popping on decel. May be worth trying it again and working on decel if the mpg goes up. I realize I didn't buy a HD for great gas mileage, but was hoping for something close to EPA estimates than this.
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Road Master
Joined: Apr 2006
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From:
RE: Poor MPG with TMax
Right; when hooked up & making changes to the ECM map, just write it & ride. No need to reinitialize (is that a word?
) when making 'live' changes. If you tweek your map & then load it into the ECM you need to initialize etc again.
VicW.
) when making 'live' changes. If you tweek your map & then load it into the ECM you need to initialize etc again.VicW.
Tourer
Joined: Jun 2007
Posts: 383
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From: Franklin, TN
RE: Poor MPG with TMax
ORIGINAL: bdavis385
I live in Seattle, so it is cool and traffic, even on the highways is frequently stop and go; there are also quite a few hills. My AFR settins are at 13.66 (front) and 13. 80 (rear). I am planning on some cruising on I-5 just to see what the fuel mileage is at 60 MPH. I tried map 401 but had some popping on decel. May be worth trying it again and working on decel if the mpg goes up. I realize I didn't buy a HD for great gas mileage, but was hoping for something close to EPA estimates than this.
I live in Seattle, so it is cool and traffic, even on the highways is frequently stop and go; there are also quite a few hills. My AFR settins are at 13.66 (front) and 13. 80 (rear). I am planning on some cruising on I-5 just to see what the fuel mileage is at 60 MPH. I tried map 401 but had some popping on decel. May be worth trying it again and working on decel if the mpg goes up. I realize I didn't buy a HD for great gas mileage, but was hoping for something close to EPA estimates than this.