How soon do xied,s work??
Outstanding HDF Member
Joined: Apr 2012
Posts: 2,899
Likes: 127
From: Chandler, Arizona
Oh, you're one of those cut and paste loud mouths...
OK, read this cut and paste-
"From the factory all EFI Harley models are tuned based on several objectives. This includes emissions standards and the calibration itself is based on the stock components. The Delphi ECM is a speed density system which is based on modeled airflow. While the system is calibrated based on load and air mass the closed loop area of the calibration is configured to operate at or near 14.68 AFR. In most calibrations closed loop is from idle up to approx 80 kPa (say approx 60% throttle) which during this time the ECM uses feedback from various sensors including the stock narrowband O2 sensors to maintain the tune. The NB O2 sensors can only measure a small area near stoich which is 14.6:1 (+/- about .3) Besides the EFI systems ability to adjust for conditions such as ambient temperature, barometric pressure, etc... the system is designed to adjust for small variations such as inconsistencies in fuels and production tolerances based on the stock components, but the primary function is to keep the AFR at (or near)14.6:1 in closed loop. Although there is a window of adjustment and the system does have the ability to adapt to a certain extent, It is simply not in its strategy or is it capable of adjusting for free flowing components When you change these parts you can easily put the fuel requirements outside of the EFI's window of adjustment as it is calibrated for the stock components. This is a problem, especially considering the closed loop AFR target in the stock calibration is 14.6:1 which is already leaner than optimum. If your fuel requirements are beyond the ECM's adjustment the mixture goes dangerously lean, it can easily go leaner than 15:1. This is where you will feel poor throttle response, surging, detonation and in extreme cases engine damage. The higher RPM regions are generally not as much of a problem as the stock AFR targets have to be richer to prevent detonation, but they are certainly not optimum. For these reasons EFI tuning is one of the best improvements you can make to your bike. This is our specialty and we offer 100% tuning support."
To summarize:
Closed loop is the problem area where the ECM tries to maintain 14.6.
Open loop (above 60% throttle) is much fatter on the AF and generally not a problem.
Oh yeah, I won't pretend like this is my personal info. You can read more, here- http://fuelmotousa.com/harleymain.htm Feel free to tell Jamie you know more than him....
And that, ladies and gentlemen, is why XIEDs work so well for a basic stage 1.
OK, read this cut and paste-
"From the factory all EFI Harley models are tuned based on several objectives. This includes emissions standards and the calibration itself is based on the stock components. The Delphi ECM is a speed density system which is based on modeled airflow. While the system is calibrated based on load and air mass the closed loop area of the calibration is configured to operate at or near 14.68 AFR. In most calibrations closed loop is from idle up to approx 80 kPa (say approx 60% throttle) which during this time the ECM uses feedback from various sensors including the stock narrowband O2 sensors to maintain the tune. The NB O2 sensors can only measure a small area near stoich which is 14.6:1 (+/- about .3) Besides the EFI systems ability to adjust for conditions such as ambient temperature, barometric pressure, etc... the system is designed to adjust for small variations such as inconsistencies in fuels and production tolerances based on the stock components, but the primary function is to keep the AFR at (or near)14.6:1 in closed loop. Although there is a window of adjustment and the system does have the ability to adapt to a certain extent, It is simply not in its strategy or is it capable of adjusting for free flowing components When you change these parts you can easily put the fuel requirements outside of the EFI's window of adjustment as it is calibrated for the stock components. This is a problem, especially considering the closed loop AFR target in the stock calibration is 14.6:1 which is already leaner than optimum. If your fuel requirements are beyond the ECM's adjustment the mixture goes dangerously lean, it can easily go leaner than 15:1. This is where you will feel poor throttle response, surging, detonation and in extreme cases engine damage. The higher RPM regions are generally not as much of a problem as the stock AFR targets have to be richer to prevent detonation, but they are certainly not optimum. For these reasons EFI tuning is one of the best improvements you can make to your bike. This is our specialty and we offer 100% tuning support."
To summarize:
Closed loop is the problem area where the ECM tries to maintain 14.6.
Open loop (above 60% throttle) is much fatter on the AF and generally not a problem.
Oh yeah, I won't pretend like this is my personal info. You can read more, here- http://fuelmotousa.com/harleymain.htm Feel free to tell Jamie you know more than him....
And that, ladies and gentlemen, is why XIEDs work so well for a basic stage 1.
Road Master
Joined: Jul 2010
Posts: 1,051
Likes: 7
Oh, you're one of those cut and paste loud mouths...
OK, read this cut and paste-
"From the factory all EFI Harley models are tuned based on several objectives. This includes emissions standards and the calibration itself is based on the stock components. The Delphi ECM is a speed density system which is based on modeled airflow. While the system is calibrated based on load and air mass the closed loop area of the calibration is configured to operate at or near 14.68 AFR. In most calibrations closed loop is from idle up to approx 80 kPa (say approx 60% throttle) which during this time the ECM uses feedback from various sensors including the stock narrowband O2 sensors to maintain the tune. The NB O2 sensors can only measure a small area near stoich which is 14.6:1 (+/- about .3) Besides the EFI systems ability to adjust for conditions such as ambient temperature, barometric pressure, etc... the system is designed to adjust for small variations such as inconsistencies in fuels and production tolerances based on the stock components, but the primary function is to keep the AFR at (or near)14.6:1 in closed loop. Although there is a window of adjustment and the system does have the ability to adapt to a certain extent, It is simply not in its strategy or is it capable of adjusting for free flowing components When you change these parts you can easily put the fuel requirements outside of the EFI's window of adjustment as it is calibrated for the stock components. This is a problem, especially considering the closed loop AFR target in the stock calibration is 14.6:1 which is already leaner than optimum. If your fuel requirements are beyond the ECM's adjustment the mixture goes dangerously lean, it can easily go leaner than 15:1. This is where you will feel poor throttle response, surging, detonation and in extreme cases engine damage. The higher RPM regions are generally not as much of a problem as the stock AFR targets have to be richer to prevent detonation, but they are certainly not optimum. For these reasons EFI tuning is one of the best improvements you can make to your bike. This is our specialty and we offer 100% tuning support."
To summarize:
Closed loop is the problem area where the ECM tries to maintain 14.6.
Open loop (above 60% throttle) is much fatter on the AF and generally not a problem.
Oh yeah, I won't pretend like this is my personal info. You can read more, here- http://fuelmotousa.com/harleymain.htm Feel free to tell Jamie you know more than him....
And that, ladies and gentlemen, is why XIEDs work so well for a basic stage 1.
OK, read this cut and paste-
"From the factory all EFI Harley models are tuned based on several objectives. This includes emissions standards and the calibration itself is based on the stock components. The Delphi ECM is a speed density system which is based on modeled airflow. While the system is calibrated based on load and air mass the closed loop area of the calibration is configured to operate at or near 14.68 AFR. In most calibrations closed loop is from idle up to approx 80 kPa (say approx 60% throttle) which during this time the ECM uses feedback from various sensors including the stock narrowband O2 sensors to maintain the tune. The NB O2 sensors can only measure a small area near stoich which is 14.6:1 (+/- about .3) Besides the EFI systems ability to adjust for conditions such as ambient temperature, barometric pressure, etc... the system is designed to adjust for small variations such as inconsistencies in fuels and production tolerances based on the stock components, but the primary function is to keep the AFR at (or near)14.6:1 in closed loop. Although there is a window of adjustment and the system does have the ability to adapt to a certain extent, It is simply not in its strategy or is it capable of adjusting for free flowing components When you change these parts you can easily put the fuel requirements outside of the EFI's window of adjustment as it is calibrated for the stock components. This is a problem, especially considering the closed loop AFR target in the stock calibration is 14.6:1 which is already leaner than optimum. If your fuel requirements are beyond the ECM's adjustment the mixture goes dangerously lean, it can easily go leaner than 15:1. This is where you will feel poor throttle response, surging, detonation and in extreme cases engine damage. The higher RPM regions are generally not as much of a problem as the stock AFR targets have to be richer to prevent detonation, but they are certainly not optimum. For these reasons EFI tuning is one of the best improvements you can make to your bike. This is our specialty and we offer 100% tuning support."
To summarize:
Closed loop is the problem area where the ECM tries to maintain 14.6.
Open loop (above 60% throttle) is much fatter on the AF and generally not a problem.
Oh yeah, I won't pretend like this is my personal info. You can read more, here- http://fuelmotousa.com/harleymain.htm Feel free to tell Jamie you know more than him....
And that, ladies and gentlemen, is why XIEDs work so well for a basic stage 1.
I'll just say this and leave it alone, what you cut and pasted confirms exactly what I have been saying. They just wrote a single sentence on WOT stating they're richer to prevent detonation - and you can see from the chart I posted that this is indeed true. They say it's richer but not optimal - exactly what I was saying! So now you've posted confirming "evidence" from another source to help make my point. Thank you.
I'm done.
Last edited by schwingding; Nov 6, 2012 at 03:30 PM.
Road Master
Joined: Jul 2010
Posts: 1,051
Likes: 7
I am aware of what they sell, and you have no idea of what is in my imagination. You do realize I was trying to help you guys understand exactly what the xied does and does not do, right? It was not an attack, and it was all valid, technical info and points. Why attack me for imparting knowledge that is definitely lacking around here when it comes to EFI and the "magic" of the various tuners and gadgets we put on our bikes. Do you guys really NOT want to know how your bikes work? I want to know what every electron is doing.
Road Master
Joined: Jan 2015
Posts: 894
Likes: 69
From: Ca
Yes, it will work perfectly fine and probably a little better than stock. What they are saying to sum it up: The bike will not run at the most optimal it possibly can. It will run fine and be safe and you will probably not have any problems.
This isn't a race bike that you're tuning to make the most power so that you can win something. You're adding some parts to make it sound better and possibly run a little better. If you want it to run the best it can possibly run go drop 6-700 and get it dyno tuned. Most people don't give a **** if it runs the best it can. They just want it to run and be reliable
This isn't a race bike that you're tuning to make the most power so that you can win something. You're adding some parts to make it sound better and possibly run a little better. If you want it to run the best it can possibly run go drop 6-700 and get it dyno tuned. Most people don't give a **** if it runs the best it can. They just want it to run and be reliable
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