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Keatodylan

Gas mileage after tune sucks

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Keatodylan

Before my tune and akra carbon i was getting around 48-52 mpg average on the dash since tune and exhaust my dash now says low 30s. I am pretty hard on the bike atleast from a stop but i dont really go much over 60 most of the time almost all of my riding is city.

I got the tune from 2WDW and removed my snorkel and made sure to tell them I have an akra carbon and removed snorkel.

2018 if that makes any difference.

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norcal616

The dash board MPG is kinda wonky... majority of us figure out MPG by miles accumulated between fill ups divided by amount of gas put back in... might have to do this a few times to get an avg... 

 

Your MPG drops after having the ECU reflashed... factory OEM mapping is on the slightly lean side to achieve emissions ratings and get high mpg... Reflashed the ECU tends to richen the map up for power/better reliability, smoother deceleration( deceleration injection turn back on)... 

 

MPG is also more dependent on your right wrist...

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2015 fz-07- Hordpower Edition...2015 fj-09- 120whp- Graves Exhaust w/Woolich Race Kit- tuned by 2WDW
 

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Keatodylan
3 minutes ago, norcal616 said:

The dash board MPG is kinda wonky... majority of us figure out MPG by miles accumulated between fill ups divided by amount of gas put back in... might have to do this a few times to get an avg... 

 

Your MPG drops after having the ECU reflashed... factory OEM mapping is on the slightly lean side to achieve emissions ratings and get high mpg... Reflashed the ECU tends to richen the map up for power/better reliability, smoother deceleration( deceleration injection turn back on)... 

 

MPG is also more dependent on your right wrist...

Im aware of that but I was looking around the forum and people were saying they lost like maybe 5 mpg max, as i said im fairly hard on it sometime but I still think im pretty sensible with it, I rode just about as hard as i do now before the reflash/exhaust as well so i was only expecting that few miles drop, but ill keep track of it by fill up for a few times to see if the dash is accurate. Thanks

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norcal616

Yeah 5mpg seems to be the avg loss... Also make sure your running on premium pump gas, IIRC thats what 2wdw uses... Also if you live in an area with summer/winter blends of gas- winter blend gas is not as good as summer blend gas... 


2015 fz-07- Hordpower Edition...2015 fj-09- 120whp- Graves Exhaust w/Woolich Race Kit- tuned by 2WDW
 

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Keatodylan
2 minutes ago, norcal616 said:

Yeah 5mpg seems to be the avg loss... Also make sure your running on premium pump gas, IIRC thats what 2wdw uses... Also if you live in an area with summer/winter blends of gas- winter blend gas is not as good as summer blend gas... 

Im in California so i dont believe we have different blends, and I always use 91 because thats the best we can get at the pump here

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Cruizin
6 hours ago, Keatodylan said:

Before my tune and akra carbon i was getting around 48-52 mpg average on the dash since tune and exhaust my dash now says low 30s. I am pretty hard on the bike atleast from a stop but i dont really go much over 60 most of the time almost all of my riding is city.

I got the tune from 2WDW and removed my snorkel and made sure to tell them I have an akra carbon and removed snorkel.

2018 if that makes any difference.

Almost anything you do to an engine to increase power, is gonna hurt MPG.  

 

Besides MPG, how do you like the tune? Like the extra power? Notice smoother throttle response? Anything good to say about it?   Because honestly, thousands have gotten their tunes from 2wdw on our forums, and none of us were thinking about MPG when we ordered our tunes and exhaust.  We do it for all of the other benefits that come with performance upgrades.  

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Beemer

If it were a tune to improve on a stock bike (stock pipe) then you would have a legit complaint. Besides, being hard on the gas from a stop does not help. Try going easy from stops and be more gradual getting up to speed and see if that helps. GL!


Beemer

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Keatodylan
21 hours ago, Cruizin said:

Almost anything you do to an engine to increase power, is gonna hurt MPG.  

 

Besides MPG, how do you like the tune? Like the extra power? Notice smoother throttle response? Anything good to say about it?   Because honestly, thousands have gotten their tunes from 2wdw on our forums, and none of us were thinking about MPG when we ordered our tunes and exhaust.  We do it for all of the other benefits that come with performance upgrades.  

love the tune, im only making this post because I saw most people were seeing only about 5 mpg drop and im seeing around 10 mpg

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cyow5

Are you going fully WOT or just heavy throttle?

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Jay Z

Kind of crazy to argue a performance mod lost mpg.... AND you get on it hard but only to 60 lol. I'mma tell the next cop that. I'll report back

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Thebadguy
On 2/27/2019 at 11:09 PM, Keatodylan said:

love the tune, im only making this post because I saw most people were seeing only about 5 mpg drop and im seeing around 10 mpg

Mine dropped about 10mpg also.   Was mid 40s down to low 30s.  I do mostly city riding.  I thought I was the only one

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cornerslider

One benefit (probably the only benefit) of going the PCV route, is that it still retains the "ECO" mode for cruising. I went the PVC route with the Hordpower intake, with Hords PCV map. My bike pulls like a freight train when I hammer it.... I also got the benefit of almost 60 mpg when I put it back on the street last year. (It is now my dedicated track only bike for 2020). Honestly, if I had to do it over, I'd probably go for the ECU flash/tune. But for those that want the horsepower to let it rip up a track, and not lose MPG on the street the PVC might be a good option-


""W.O.T. until you see god, then brake"

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2wheeldynoworks
On 1/3/2020 at 10:24 PM, cornerslider said:

One benefit (probably the only benefit) of going the PCV route, is that it still retains the "ECO" mode for cruising. I went the PVC route with the Hordpower intake, with Hords PCV map. My bike pulls like a freight train when I hammer it.... I also got the benefit of almost 60 mpg when I put it back on the street last year. (It is now my dedicated track only bike for 2020). Honestly, if I had to do it over, I'd probably go for the ECU flash/tune. But for those that want the horsepower to let it rip up a track, and not lose MPG on the street the PVC might be a good option-

This is actually not correct. The "Eco" light on the dash means absolutely nothing. It is simply a logic circuit in the dash that illuminates when you're below a specific throttle vs RPM threshold. Our ECU flash maintains the closed loop function of the O2 sensor on these bikes, so it will trim for fuel efficiency during light throttle. 

The majority of the fuel economy loss people experience is from the disabling of the fuel cut on deceleration. This is what causes the massively exaggerated engine braking sensation when you let off the throttle with the bike in completely stock configuration. With this disabled, the injectors are allowed to ramp down slowly as RPM decreases instead of shutting off like a light switch. 

Most people experience some fuel economy loss with our ECU flash purely for this reason. There's no escaping it, even on a completely stock bike, if you'd like the engine braking smoothed out. Those that are experiencing big fuel economy losses are almost always simply riding the bike much more aggressively than they were before purely out of enjoyment of the improved performance! 

As always, we're happy to help, so if anyone ever experiences a fuel economy change that they don't believe is appropriate for their modifications, feel free to give us a call.

 

-2WDW

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1tondriver

Funny you mention the decel cut. I have installed a slipper and was wondering if I should have it reflashed back? Any insight is appreciated. 

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2wheeldynoworks
Just now, 1tondriver said:

Funny you mention the decel cut. I have installed a slipper and was wondering if I should have it reflashed back? Any insight is appreciated. 

Definitely not! There's absolutely no reason for a fuel cut on decel in terms of performance and throttle response; it is only present emissions purposes.

 

The slipper will definitely help on decel into corners after one, or multiple, downshifts either way! It is there to allow the rear wheel speed and transmission output shaft speed to equalize with as little disruption to the chassis as possible. Re-enabling the decel fuel cut will simply require more slip to accomplish the same goal.

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mossrider
Just now, 1tondriver said:

Funny you mention the decel cut. I have installed a slipper and was wondering if I should have it reflashed back? Any insight is appreciated. 

Not to horn in your question to 2WDW, but, leave it the hell alone, lol. Mine is flashed and I have a slipper. The payoff is in on-off throttle in and outta corners or in heavy traffic. It's butter smooth. No hicups, burbles, bobbles, nothing but instant stonk. Leave it alone. Over to 2WDW

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1tondriver

Thanks guys for the prompt response 👍 Leaving it alone 

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rfmueller

Just 2 more cents:  I have an 2017 FZ-07 with snorkel removed, Scorpion Serket Exhaust,and has 2dwd tune, (except I specified that decel cut be left at factory setup).  There was a performance improvement; seemed smoother and perhaps a bit stronger (but I'm not a regular heavy throttler so it could be placebo), however, the gas mileage remained exactly the same.  There was also a new "kick" at start up after the 2dwd tune.  2dwd said that kick happens when the engine transfers from a lower idle rpm (lean) to a higher rpm (richer from the new mapping) off the line.  The kick takes place because of the sudden power increase.  A copy of the email is pasted below:

***************************************************************************

From: "2wheeldynoworks" <2wheeldynoworks@gmail.com>
To: "Ray Mueller" <rfmueller@q.com>
Sent: Saturday, October 19, 2019 1:58:28 PM
Subject: Re: Factory Defaults

Ray,

The "kick" off the line is a result of the sudden torque these parallel twin engines generate with proper fuel mapping and a free-flowing exhaust system. Running your Serket with the stock mapping in place will cause a lean condition and be detrimental to the overall life of the bike and performance. 

As for the fan temperatures, that is a discrepancy between the dash and the sensor reading into the ECU itself. All of our fan temperatures are set at 205/195. We have seen the dash units on these FZ-07's read wildly inaccurate temperatures several times before with no real support from Yamaha when we pressed the issue with our local dealers. Our very own test bike reads lower temps than actual coolant temps, on the dash.

-2WDW

***************************************************************************

I've been able to richen up the idle a bit by simply closing off the air flow balance screws by 1/2 turn, as well as custom tune the air flow balances to eliminate the kick entirely.  It's not a lot richer, but enough to work with so that making small 1/8 turn adjustments on one side after the final balance allowed the engine to smooth out during "take off".  I've only tested it once since making the last adjustment, so it remains to be seen in hot summer air if it's real.

 

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cornerslider
3 hours ago, 2wheeldynoworks said:

This is actually not correct. The "Eco" light on the dash means absolutely nothing. It is simply a logic circuit in the dash that illuminates when you're below a specific throttle vs RPM threshold. Our ECU flash maintains the closed loop function of the O2 sensor on these bikes, so it will trim for fuel efficiency during light throttle. 

The majority of the fuel economy loss people experience is from the disabling of the fuel cut on deceleration. This is what causes the massively exaggerated engine braking sensation when you let off the throttle with the bike in completely stock configuration. With this disabled, the injectors are allowed to ramp down slowly as RPM decreases instead of shutting off like a light switch. 

Most people experience some fuel economy loss with our ECU flash purely for this reason. There's no escaping it, even on a completely stock bike, if you'd like the engine braking smoothed out. Those that are experiencing big fuel economy losses are almost always simply riding the bike much more aggressively than they were before purely out of enjoyment of the improved performance! 

As always, we're happy to help, so if anyone ever experiences a fuel economy change that they don't believe is appropriate for their modifications, feel free to give us a call.

 

-2WDW

Thank you for the education... Apparently I got some bad information along the way. You would obviously know more than me about it. I appreciate you explaining it, rather than "trolling" me. Keep up the good work. I've heard nothing but the best about 2WDW.

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""W.O.T. until you see god, then brake"

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2wheeldynoworks
25 minutes ago, cornerslider said:

Thank you for the education... Apparently I got some bad information along the way. You would obviously know more than me about it. I appreciate you explaining it, rather than "trolling" me. Keep up the good work. I've heard nothing but the best about 2WDW.

Of course! We are always happy to help and urge anyone that ever has any questions to reach out to us directly so misinformation doesn't run rampant. 

 

-2WDW

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