Air fuel mixture?
Thread Starter
|
Road Master
Joined: May 2006
Posts: 1,125
Likes: 0
From:
Air fuel mixture?
Is there a propoer air fuel mixture that runs a bike cooler than stock, gives a bump in performance and still maintains 40+ MPG?
I have a stock 07 FLHX and looking to do a stage 1, I already have a V&H fuel pak but looking at slip-ons and a big sucker breather.
Any advice or suggestions would be great.
I have a stock 07 FLHX and looking to do a stage 1, I already have a V&H fuel pak but looking at slip-ons and a big sucker breather.
Any advice or suggestions would be great.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Is there a propoer air fuel mixture that runs a bike cooler than stock, gives a bump in performance and still maintains 40+ MPG?
I have a stock 07 FLHX and looking to do a stage 1, I already have a V&H fuel pak but looking at slip-ons and a big sucker breather.
Any advice or suggestions would be great.
I have a stock 07 FLHX and looking to do a stage 1, I already have a V&H fuel pak but looking at slip-ons and a big sucker breather.
Any advice or suggestions would be great.
The problem with your setup is determining AFR with only a FuelPak installed. Without putting your bike on a dyno you would have to install a true auto-tune system (PCV with Auto-Tune or Zippers Thundermax) you can't determine AFRs thoughout the bike's operational range. You could use a sniffer with the FuelPak but I don't know how effective this might be. Call Fuel Moto for advise, as they sell most tuners and will give you no-BS info.
Outstanding HDF Member
Joined: Apr 2009
Posts: 2,582
Likes: 2
From: Central Jersey
TTS Master Tune
The ideal air-fuel ratio (AFR) will vary depending on the circumstances. Ideal AFR for WOT on a typical Harley is normally considered to be around 13.0-13.2, while at cruise it is 13.8-14.6. Best for cooling at cruise is toward the low-end of this range, mileage the upper-end. It would be impossible for me to tell you the exact AFR that would meet your requirements on your bike, but I would make sure WOT is 13.0 and start your experiments with the cruise-range at around 14.2.
The problem with your setup is determining AFR with only a FuelPak installed. Without putting your bike on a dyno you would have to install a true auto-tune system (PCV with Auto-Tune or Zippers Thundermax) you can't determine AFRs thoughout the bike's operational range. You could use a sniffer with the FuelPak but I don't know how effective this might be. Call Fuel Moto for advise, as they sell most tuners and will give you no-BS info.
The problem with your setup is determining AFR with only a FuelPak installed. Without putting your bike on a dyno you would have to install a true auto-tune system (PCV with Auto-Tune or Zippers Thundermax) you can't determine AFRs thoughout the bike's operational range. You could use a sniffer with the FuelPak but I don't know how effective this might be. Call Fuel Moto for advise, as they sell most tuners and will give you no-BS info.
How effective would a TTS Master Tune be to tune a bike?
Road Captain
Joined: Feb 2007
Posts: 684
Likes: 1
From: Colorado
Altitude also seems to play a part in this.
I believe the EPA fuel air mix is something like 14.8 : 1, but that's probably running it lean.
Of course air depends on altitude, and the o2 sensors (etc.) can accommodate some of this, but not all.
I live at about 7,500 ft elevation, and routinely ride between 4,000 ft and up to 10,000 (12,000 on occasion). With the map I have installed it runs fine. HOWEVER when I travel down to sea level, it runs rich - and the plugs load up (especially in the heat).
I really don't know how to set this up by myself using a fuel Pak.. anyone have any clues?
I believe the EPA fuel air mix is something like 14.8 : 1, but that's probably running it lean.
Of course air depends on altitude, and the o2 sensors (etc.) can accommodate some of this, but not all.
I live at about 7,500 ft elevation, and routinely ride between 4,000 ft and up to 10,000 (12,000 on occasion). With the map I have installed it runs fine. HOWEVER when I travel down to sea level, it runs rich - and the plugs load up (especially in the heat).
I really don't know how to set this up by myself using a fuel Pak.. anyone have any clues?
Novice
Joined: Aug 2009
Posts: 17
Likes: 0
From: Lanesville, Indiana
I was wondering, does the dealer check the A/F ratio and make adjusts as part of routine service. I've done all the service work on my 09 Ultra after the dealer did the first service. Engine is stock with the excpetion of a K&N air filter. Sometimes at cold start the engine sort of hunts at idle and then settles down. Is this normal?
Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
Likes: 85
From: Nevada
I was wondering, does the dealer check the A/F ratio and make adjusts as part of routine service. I've done all the service work on my 09 Ultra after the dealer did the first service. Engine is stock with the excpetion of a K&N air filter. Sometimes at cold start the engine sort of hunts at idle and then settles down. Is this normal?
Trending Topics
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
It's an excellent flash-based tuner, i.e. it works with the ECU rather than being an add-on module like the PCV. If you already have PCV, TTS, SEST, SERT, or T'max I wouldn't suggest changing to something else unless you have a very good reason to do so, like to gain a feature you simply must have, your present tuner isn't making you happy, or a dyno-tune is required and the chosen tech requires a specific tuner. Just my 2˘.
Last edited by iclick; Jun 14, 2010 at 02:28 PM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
The Best and Worst Harley-Davidson Moves of 2025
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
