Modification changes???

[Michael82009]

I own a 2014 RT Limited. I live at 6000 feet altitude and ride mostly in the 4,000-10,000 altitude. Typically most vehicles around here is starving for air. I have already replaced the cat with Lamonster Garage performance muffler replacement pipe but using stock muffler and thinking about adding the Kewl Metal performance air filter kit. My question is at this altitude, will I need to adjust the fuel management system?
i am basically allowing more air to pass through the engine. I'm thinking it may work out good due to the thinner air in the Rocky Mountain area.
Thoughts and tech info much appreciated. Thanks.

 

[billybovine]

I own a 2014 RT Limited. I live at 6000 feet altitude and ride mostly in the 4,000-10,000 altitude. Typically most vehicles around here is starving for air. I have already replaced the cat with Lamonster Garage performance muffler replacement pipe but using stock muffler and thinking about adding the Kewl Metal performance air filter kit. My question is at this altitude, will I need to adjust the fuel management system?
i am basically allowing more air to pass through the engine. I'm thinking it may work out good due to the thinner air in the Rocky Mountain area.
Thoughts and tech info much appreciated. Thanks.

It is suppose to do that automatically. The AAPTS (Ambient Air Pressure Temperature Sensor) changes the engine parameters with changes in air pressure due to altitude changes.

 

[Bob Denman]

:agree:
I believe that some folks who have ridden to the top of Pike's Peak, have said that their bikes through some error codes right up near the top... (Over 14,000 feet!)

...But it was nothing to worry about.

 

[Snowbelt Spyder]

It is suppose to do that automatically. The AAPTS (Ambient Air Pressure Temperature Sensor) changes the engine parameters with changes in air pressure due to altitude changes.

Exactly. And it is, Michael. Your ECU is programed to maintain a specific Air/Fuel Ratio (AFR), not a specific horsepower. With less air, it adds less fuel in order to maintain the correct AFR. Any naturally aspirated engine loses power with altitude - about 3% for every 1000 feet. You don't fix that with a fuel management change, you fix that with a turbo charger. Besides, I don't believe that air filter kit is for your engine, anyway.

Now, if you want to change the AFR and override what the ECU is maintaining, that's a whole different situation. That's another after market piece of equipment and expense, but it still won't give you back the horsepower loss that comes with altitude. Snow machine guys deal with these issues all the time. Somebody that runs / races snow machines at altitude should be able to give you some good tech advice.

 

[Chupaca]

All of the above...

But then your best answer is to make your mods and test it out yourself. These are techy machines and do a good job with fuel/air mixture control. It will still go back to your ryding style which will dictate how it will feel to you...:thumbup:

 

[Michael82009]

Exactly. And it is, Michael. Your ECU is programed to maintain a specific Air/Fuel Ratio (AFR), not a specific horsepower. With less air, it adds less fuel in order to maintain the correct AFR. Any naturally aspirated engine loses power with altitude - about 3% for every 1000 feet. You don't fix that with a fuel management change, you fix that with a turbo charger. Besides, I don't believe that air filter kit is for your engine, anyway.

Now, if you want to change the AFR and override what the ECU is maintaining, that's a whole different situation. That's another after market piece of equipment and expense, but it still won't give you back the horsepower loss that comes with altitude. Snow machine guys deal with these issues all the time. Somebody that runs / races snow machines at altitude should be able to give you some good tech advice.

I guess they don't make it for my rt. Guess I'm stuck with a K&N

 

[ARtraveler]

Interesting read. Thanks for posting the information. A bit to technical for me to add anything about adjustments though. :thumbup: