Tuning to Reality with the Air Fuel Meter involved Part 2 - Victory Forums - Victory Motorcycle Forum
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post #1 of 28 (permalink) Old 04-08-2014, 12:46 PM Thread Starter
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Default Tuning to Reality with the Air Fuel Meter involved Part 2

Tuning to Reality with the Air Fuel Meter involved – Part 2

After reading all that I could find on the subject and talking with some of our major players in the motorcycle upgrade and fuel tuning field...

Initially I was very excited about my new found power and performance on my 12 Cross bike after the initial install but the gas mileage was dismal and the performance had holes in it and I could feel but not see. Tuning without regard to understanding air fuel ratios is like shooting at a moving target with your eyes closed. Sometimes you hit and sometimes you don’t. Dobeck tries to make it simple but the black art of tuning is anything but easy even with only 3 buttons to push in the 6 different modes available to use. Green for cruise, yellow for acceleration and red for full throttle.

The two other transition Y/B & R/B modes are for transitioning from cruise to acceleration and from acceleration to full throttle.

Fast forward to 10 days later of being buried in due diligence and test riding…

I had set my fuel tuner to the recommended settings to begin with but ended up so far away when adding the AF meter I would never recommend anyone to install a tuner without using one - as you risk running fat in some areas and lean in others not really knowing where using only your butt meter and every motor is different.

*A startling difference in the Cruise mode where we spend most of our time on the throttle. Adding more gas than it needs thinking it is more power is wrong thinking.

Use and believe the Air Fuel meter for tuning, not your butt feel.

Initial Settings were 3.5G 2Y .5R .5GB .5YB 4RB = 27-33 MPG Free breathing, great idle and more power.

Final settings with Air Fuel meter used: 12.5 AF accelerating and 14.2 -15.0 Fwy cruise

.5G 1Y .5R .5GB .5YB 3RB = 39 - 44 MPG


Good power, easier breathing and steady idle with decent gas mileage.


Mission accomplished!

This graph easily depicts the understanding of AF compromise.

Installing the Fuel/Air ratio meter was very simple to install and easy to use. Do it yourself with a tuner, air filter and pipes make this a very cost efficient upgrade with measurable results. Simply unscrewing the stock oxygen sensor and replacing with the Dobeck wired unit and attaching to a power port is all that is needed. I brought up my fuel controller to the gas tank to see when I transitioned to the different modes while under power.

Dobeck makes a performance upgrade done at home in your garage easy starting with an accessible low cost fuel tuner and adding the other modification parts from our favorite vendors to accomplish a better running Victory !

If you missed it - Part 1
https://www.victoryforums.com/showthread.php?t=69810
Attached Images
File Type: jpg Stoich.jpg (9.6 KB, 41 views)
File Type: jpg SAFR in pieces.jpg (38.2 KB, 41 views)
File Type: jpg Tuner and AF Meter on Tank.jpg (47.5 KB, 44 views)
File Type: jpg AF Connected to 12V.jpg (66.5 KB, 40 views)
File Type: jpg ScrewinOX sensor.jpg (45.8 KB, 39 views)

2012 Cross Country Tour - VroomHilda
Dobeck EJK Gen3 Fuel Tuner
Tri Flo Ovals
Vic K&N knock off Air filter
Lloyds Timing Wheel +2
Relocated Air Shock fill hose
WD SkidPlate reinforced
Hyper running/brake lights
Garmin GPS
Existential Secular Humorist with warrior Buddhist leanings
*Rider/Owner continuous since 1973 - 877,000+ miles USMC R

Last edited by SemperVee; 04-09-2014 at 08:44 AM.
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post #2 of 28 (permalink) Old 04-08-2014, 04:09 PM
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This is exactly why I want the VCF 4. i do not like guessing. An AFR meter is a must.

Which AF meter are you using there?

m

'12 Vegas, 78 Bonneville, 69 BSA project.
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post #3 of 28 (permalink) Old 04-08-2014, 06:05 PM Thread Starter
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It's the Dobeck rental Kit (SAFRTool.com)
Easy set up and use..


Quote:
Originally Posted by SilentUnicorn View Post
This is exactly why I want the VCF 4. i do not like guessing. An AFR meter is a must.

Which AF meter are you using there?

m

2012 Cross Country Tour - VroomHilda
Dobeck EJK Gen3 Fuel Tuner
Tri Flo Ovals
Vic K&N knock off Air filter
Lloyds Timing Wheel +2
Relocated Air Shock fill hose
WD SkidPlate reinforced
Hyper running/brake lights
Garmin GPS
Existential Secular Humorist with warrior Buddhist leanings
*Rider/Owner continuous since 1973 - 877,000+ miles USMC R
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post #4 of 28 (permalink) Old 04-08-2014, 06:15 PM
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wouldnt a dyno tune do the same?

06 Kingpin..
K&N air filter
Victory Drag Pipes
ATS @ +4
VFC III
Tuned by KMC

08 vision premium.. totaled :(
06 kp traded in.
04 vegas lost in flood 2010.
06 hyosung traded in for vegas.
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post #5 of 28 (permalink) Old 04-09-2014, 12:31 AM Thread Starter
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Quote:
Originally Posted by spanknut24 View Post
wouldnt a dyno tune do the same?
You obviously did not read Part 1, Paragraph 1.

2012 Cross Country Tour - VroomHilda
Dobeck EJK Gen3 Fuel Tuner
Tri Flo Ovals
Vic K&N knock off Air filter
Lloyds Timing Wheel +2
Relocated Air Shock fill hose
WD SkidPlate reinforced
Hyper running/brake lights
Garmin GPS
Existential Secular Humorist with warrior Buddhist leanings
*Rider/Owner continuous since 1973 - 877,000+ miles USMC R

Last edited by SemperVee; 04-09-2014 at 12:34 AM.
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post #6 of 28 (permalink) Old 04-09-2014, 03:12 AM
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Quote:
Originally Posted by SemperVee View Post
You obviously did not read Part 1, Paragraph 1.

You sir are correct. Sorry.I tried to locate it with no luck.

06 Kingpin..
K&N air filter
Victory Drag Pipes
ATS @ +4
VFC III
Tuned by KMC

08 vision premium.. totaled :(
06 kp traded in.
04 vegas lost in flood 2010.
06 hyosung traded in for vegas.

Last edited by spanknut24; 04-09-2014 at 03:21 AM.
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post #7 of 28 (permalink) Old 04-09-2014, 04:45 AM
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Part one,

https://www.victoryforums.com/showthread.php?t=69810

'12 Vegas, 78 Bonneville, 69 BSA project.
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post #8 of 28 (permalink) Old 04-09-2014, 08:40 AM
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Quote:
Originally Posted by SilentUnicorn View Post
Thanx. I searched for tuning to reality part 1.

06 Kingpin..
K&N air filter
Victory Drag Pipes
ATS @ +4
VFC III
Tuned by KMC

08 vision premium.. totaled :(
06 kp traded in.
04 vegas lost in flood 2010.
06 hyosung traded in for vegas.
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post #9 of 28 (permalink) Old 07-03-2014, 12:27 PM Thread Starter
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Update:

Experimenting with air filter seal randomly installed and off with Polaris Hi-Po filter, Now permanantly removed, added LLoyds timing gear +4 and returned to stock pipes has produced the best seat of the pants performance & best gas mileage yet. Measured with Dobeck AF meter.

High/Low/Average 50/38/44 mix of Premium/mid grade.
No access to use a DYNO to graph difference

2012 Cross Country Tour - VroomHilda
Dobeck EJK Gen3 Fuel Tuner
Tri Flo Ovals
Vic K&N knock off Air filter
Lloyds Timing Wheel +2
Relocated Air Shock fill hose
WD SkidPlate reinforced
Hyper running/brake lights
Garmin GPS
Existential Secular Humorist with warrior Buddhist leanings
*Rider/Owner continuous since 1973 - 877,000+ miles USMC R
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post #10 of 28 (permalink) Old 07-03-2014, 05:42 PM
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Quote:
Originally Posted by spanknut24 View Post
Thanx. I searched for tuning to reality part 1.
Next time you want to find a #1 post by the same guy click on his name it will shorten your search time
broggyr likes this.

2008 Vision
Mpls, MN.

Please add your state and model of bike you have. Click user CP @ top of page and then far left click edit signature. Thanks
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