Mpg?
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Outstanding HDF Member
Joined: Sep 2011
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From: No where near you, OH
Mpg?
What the hell? I have read and learned a lot here but something's been picking my *** for a while now. I've read a few guys posts claiming their fuel mileage "dropped" to somewhere in the 40 mpg range or slightly higher after they put in new cams, ac and tuner. My stock RKC's average mileage is about the same as theirs! I'm ordering new slip ons, a new ac and a Cobra Fi2000R the end of this week. So what can I expect from that point onward? 30 mpg? Then what if I decide on a cam later on? Is it maybe different altitude or something?
It's all in the tune brother. Realistically you shouldn't drop any MPG. Look at it this way, a higher perfromance bike doesn't have to as hard to acheive normal riding. I have a 110" with head work, ported throttle body and all the goodies, making over 120 HP, on a trip loaded down running 70 MPH i'll get 44 MPG. normal city type riding i'll get closer to 40. When you get your parts, make sure you do some research and find a tuner that knows what he's doing. It makes all the difference in the world.
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Outstanding HDF Member
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From: No where near you, OH
It's all in the tune brother. Realistically you shouldn't drop any MPG. Look at it this way, a higher perfromance bike doesn't have to as hard to acheive normal riding. I have a 110" with head work, ported throttle body and all the goodies, making over 120 HP, on a trip loaded down running 70 MPH i'll get 44 MPG. normal city type riding i'll get closer to 40. When you get your parts, make sure you do some research and find a tuner that knows what he's doing. It makes all the difference in the world.
Last edited by Newharleylover; Jan 2, 2012 at 10:00 PM.
I understand your concerns, you may end end up with a cam. The stage I will make some pretty good improvements over your stock ride, so I guess time will tell. I'm not familiar with the cobra "tuner" you are getting so I can't comment on it's capabilities. I did a quick read on it and see it takes the o2 sensors out of the equasion. It does not appear to be tunable, just plug and play. If this is the case, a dyno tune will be out of the question and you will be at the mercy of the cobra unit itself. If you are contempltaing a dyno tune, you may want to consider looking into a TTS mastertune or a SEPST instead of the Cobra. They are both fully tunable and retain the factory o2 sensors that will help you keep your fuel economy up where you want it.
Road Captain
Joined: Jan 2010
Posts: 527
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From: Volusia County, FL
Stage 1 with SEPST and get a solid 45-46 mpg each tankful, and that is with 10% ethenol gas. No dyno, just Smart tuned. Once I got my VEs all trued up, I used a similar target AFR table like what harleytuner posted in the SEPST sticky. Good power, good mpg and cooler running bike.
Stage 1 with SEPST and get a solid 45-46 mpg each tankful, and that is with 10% ethenol gas. No dyno, just Smart tuned. Once I got my VEs all trued up, I used a similar target AFR table like what harleytuner posted in the SEPST sticky. Good power, good mpg and cooler running bike.
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Road Captain
Joined: Jan 2010
Posts: 527
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From: Volusia County, FL
Thanks again for all your time (and all the others) for helping us out! Getting to know the tuner application and how tweaks made in different tables is a ton a fun and just increases your knowledge of EFI systems.
Have a good one.
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From: No where near you, OH
Cobra offers the Fi2000/o2 as well. It's a little more money but nothing to worry about. I'm sure it will be something tuneable but maybe I'll see how my stage 1 works out. And if I still feel the bike's too damned sluggish I will work the cheap bastard part of me out of the equation and spend the money to do it right. It's not like I'll be buying a tuner every year or anything.
Road Captain
Joined: Jan 2010
Posts: 527
Likes: 2
From: Volusia County, FL
Cobra offers the Fi2000/o2 as well. It's a little more money but nothing to worry about. I'm sure it will be something tuneable but maybe I'll see how my stage 1 works out. And if I still feel the bike's too damned sluggish I will work the cheap bastard part of me out of the equation and spend the money to do it right. It's not like I'll be buying a tuner every year or anything.
Either way, have fun and ejnoy the stage 1.
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