Stage one upgrade question
This is exactly why I wouldn't buy an older used carbureted Harley. I come from a back ground of riding dirtbikes and driving/racing fuel injected cars. Until you start really pushing serious power in a car to the point the stock fuel system can't flow enough fuel and you install larger injector or you add a power adder (or an extra power added in the case on my last ride) the stock computers in late model cars really are amazing in their ability to keep a safe air fuel ratio with mild mods (air intakes, exhaust and in the case of most cars even mild cams). I don't see why our new bikes should be different. When it comes time for a stage one for me I will be putting on a new air intake and pipes..... ride it for a bit and then pull the plugs before I blindly spend money on something that isn't needed. Spark plugs will tell you alot. But to play devils advocate, NOTHING beats a custom dyno tune on any motor. Even box stock the factories (car at least) always leave alot of power on the table.My 2 cents for what it's worth...
Advanced
Joined: Feb 2010
Posts: 86
Likes: 0
The Delphi system will try to maintain a stoichiometric air fuel ratio (AFR) of 14.7 to 1.
This is what it is programed to do to meet federal emissions.
A Harley engine runs the best at a AFR of around 13.5 to 1.
Look at an AFR scale on a dyno chart.
Adding a free flow intake and exhaust further leans out the AFR but the ECM will still try to maintain 14.7 to 1.
Adding a tuner or fuel programmer will give you the ability to change the AFR and fine tune it to where your engine will run at its peak.
Adding more fuel also has a cooling affect.
Stage 1 = Intake/exhaust/fuel programmer or tuner.
This is what it is programed to do to meet federal emissions.
A Harley engine runs the best at a AFR of around 13.5 to 1.
Look at an AFR scale on a dyno chart.
Adding a free flow intake and exhaust further leans out the AFR but the ECM will still try to maintain 14.7 to 1.
Adding a tuner or fuel programmer will give you the ability to change the AFR and fine tune it to where your engine will run at its peak.
Adding more fuel also has a cooling affect.
Stage 1 = Intake/exhaust/fuel programmer or tuner.
Seasoned HDF Member
Joined: Jan 2008
Posts: 52,957
Likes: 44,476
From: SW OH.
The Delphi system will try to maintain a stoichiometric air fuel ratio (AFR) of 14.7 to 1.
This is what it is programed to do to meet federal emissions.
A Harley engine runs the best at a AFR of around 13.5 to 1.
Look at an AFR scale on a dyno chart.
Adding a free flow intake and exhaust further leans out the AFR but the ECM will still try to maintain 14.7 to 1.
Adding a tuner or fuel programmer will give you the ability to change the AFR and fine tune it to where your engine will run at its peak.
Adding more fuel also has a cooling affect.
Stage 1 = Intake/exhaust/fuel programmer or tuner.
This is what it is programed to do to meet federal emissions.
A Harley engine runs the best at a AFR of around 13.5 to 1.
Look at an AFR scale on a dyno chart.
Adding a free flow intake and exhaust further leans out the AFR but the ECM will still try to maintain 14.7 to 1.
Adding a tuner or fuel programmer will give you the ability to change the AFR and fine tune it to where your engine will run at its peak.
Adding more fuel also has a cooling affect.
Stage 1 = Intake/exhaust/fuel programmer or tuner.
Last edited by RAWHIDE07; Apr 1, 2011 at 08:12 AM.
Advanced
Joined: Feb 2010
Posts: 86
Likes: 0
This is the fuel managment system I use from Dobeck perfromance.
EJK Controller Key Feature Explanations
EJK Controller Key Feature Explanations
- NO COMPUTER NEEDED
The EJK controller is one of the only controllers on the market which allows a large range of adjustability without the use of a computer. We like to use the term 'on-the-fly' tuning. You can literally drive the vehicle, make setting adjustments, and instantaneously feel the results. Obviously for safety purposes we recommend you pull over to the side before making adjustments. Some after-market EFI controllers like to claim 'on-the-fly' tuning which to them means toggling only between a couple preset maps. The EJK controller actually has 11,390,625 available maps in the unit which are accessible without using a computer program to reprogram the unit. There does exist a computer program called POWERLAB and the EJK controllers can be reprogrammed by a computer, but most users do not require this ability. Why deal with the complexity? It's an Electronic Jet Kit to make fuel injection tuning easy, simple, and fast so you can enjoy more time riding. - NO DYNO REQUIRED
You do not have to be a professional mechanic or tuner and have access to a dynamometer in order to tune your vehicle with the EJK controller. Knowledge and good equipment obviously are a huge plus, but you can do just as good a job and sometimes better by tuning in real world riding situations. The EJK controller allows this by breaking down a drive cycle into very understandable zones to make adjustments. Most EJK controllers have the basic Idle/Cruise, Acceleration, and Full Throttle zones to adjust. Every rider can understand this terminology. The greatest advantage about tuning your vehicle yourself is your ride will be custom set up to your driving style. - Plug N' Play Installation - Minutes to Install, Base Settings are Preset
All of the offered EJK controllers are plug n' play installations and can be done in a manner of minutes instead of hours. All you have to do is locate the OEM injector connections on your vehicle. Most of the time this will only require you to remove a few components to gain access to these injector connections. A number of new applications will also require you to find the O2 connections on your vehicle if present. Power for the unit is gained through the injector connections and a black ground wire just needs to be attached to the negative terminal on the battery if present or by a metal screw onto the vehicle frame. After physically installing the EJK controller in most cases you are all set to go on a test ride. The unit comes pre-programmed for a stage 1 setup for each application. After your initial test ride you then can make some fine tune adjustments which may be required based upon your modifications. - Uses Unique Load Based Technology
The EJK controller uses Load Based Technology which sets it apart from most of the competition. Most EFI controllers use what is called 'Alpha-N' Tuning Technology. Alpha-N tuning is associated with just using Throttle Position (TPS) and RPM as the factors to make tuning adjustments. Load Based Technology differs by using Rate, TPS and RPM as the key factors for adjustment. Load Based tuning allows a user to tune their vehicle for every gear and for all riding conditions. Load can easily be explained by stating that riding up a hill puts more "load" on the vehicle than driving on a flat road, but yet the same TPS and RPM can be achieved in both circumstances. - Offers Full Range Tunability
EJK stands for Electronic Jet Kit. Like carberator jet kits of the past the EJK offers a range of adjustability to tune your vehicle. Instead of physical jets and needles the EJK has this adjustability built into the unit and can quickly be adjusted while riding the vehicle. Essentially with all EFI vehicles software has replaced some hardware. The EJK controller can be installed and set to actually allow the user to still run a stock configuration, but allows the user to ADD or PULL fuel within easy to understand tuning zones. - Does Not Interfere with Stock ECU Operation
This is a very common feature of all aftermarket EFI controllers, but needs to be stated to reassure all end users. The EJK controller does not trip any engine codes or affect the ECU operation in any way. - Simple Push Button Adjustment Interface
The EJK controller offers 'on-the-fly' adjustment using three push buttons on the label interface. The three buttons are labeled MODE, PLUS, and MINUS. With power supplied to the box by either starting the vehicle or just turning the key on, the adjustment modes are accessed by pressing the MODE button. Light setting changes are then made for each respective mode by pressing the PLUS and MINUS buttons. No extra tools are required to make tuning adjustments.
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Intermediate
Joined: Feb 2011
Posts: 27
Likes: 0
This is exactly why I wouldn't buy an older used carbureted Harley. I come from a back ground of riding dirtbikes and driving/racing fuel injected cars. Until you start really pushing serious power in a car to the point the stock fuel system can't flow enough fuel and you install larger injector or you add a power adder (or an extra power added in the case on my last ride) the stock computers in late model cars really are amazing in their ability to keep a safe air fuel ratio with mild mods (air intakes, exhaust and in the case of most cars even mild cams). I don't see why our new bikes should be different. When it comes time for a stage one for me I will be putting on a new air intake and pipes..... ride it for a bit and then pull the plugs before I blindly spend money on something that isn't needed. Spark plugs will tell you alot. But to play devils advocate, NOTHING beats a custom dyno tune on any motor. Even box stock the factories (car at least) always leave alot of power on the table.My 2 cents for what it's worth...
Road Warrior
Joined: Apr 2010
Posts: 1,739
Likes: 10
From: Suffolk, England
The Delphi system will try to maintain a stoichiometric air fuel ratio (AFR) of 14.7 to 1.
This is what it is programed to do to meet federal emissions.
A Harley engine runs the best at a AFR of around 13.5 to 1.
Look at an AFR scale on a dyno chart.
Adding a free flow intake and exhaust further leans out the AFR but the ECM will still try to maintain 14.7 to 1.
Adding a tuner or fuel programmer will give you the ability to change the AFR and fine tune it to where your engine will run at its peak.
Adding more fuel also has a cooling affect.
Stage 1 = Intake/exhaust/fuel programmer or tuner.
This is what it is programed to do to meet federal emissions.
A Harley engine runs the best at a AFR of around 13.5 to 1.
Look at an AFR scale on a dyno chart.
Adding a free flow intake and exhaust further leans out the AFR but the ECM will still try to maintain 14.7 to 1.
Adding a tuner or fuel programmer will give you the ability to change the AFR and fine tune it to where your engine will run at its peak.
Adding more fuel also has a cooling affect.
Stage 1 = Intake/exhaust/fuel programmer or tuner.