• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Environmental Input on 449/511

bigmo

bigmo

Husqvarna
AA Class
So I found this thread on environmental input - specifically elevation and temp:

http://www.cafehusky.com/threads/altitude-compensation.27739/

Since this was sort of way when the Keihin on the 449 and 511, I thought I would check back among the experts here.

So each year, I make a couple of trips to Colorado. We typically START at 8K and go up from there. We will frequently top 13K. My home sits at 600 ft.

Right now, I am on BMW Set #3. As much as I could gather from the thread listed here is that the Keihin has a series of internal sensors (within the EFI) that continually adjust the fuel air ratios. I also gather that since my O2 sensor is off (race map II) it provides no feedback. I also gather that since it is a narrow band, it could not compensate for a massive elevation change anyway.

So, lets hear it - are the new Keihins able to compensate for massive changes in elevation and temp one would encounter with mountain riding?
 
You could put the sensor back in....

Ive only gone to 5000 ft and didnt notice any problem there, but have no idea how it would act at 2x that.
 
I was in Colorado last spring / summer on my 511 with map 3 and had to use my JD tuner to lean it out. I think I had to adjust it a couple of times going up from 8 to 13k and then again once or twice coming down. Since I had map 3 flashed I don't use the JD tuner much, but it is definitely handy at higher elevations.
 
511BRAAP said:
I was in Colorado last spring / summer on my 511 with map 3 and had to use my JD tuner to lean it out. I think I had to adjust it a couple of times going up from 8 to 13k and then again once or twice coming down. Since I had map 3 flashed I don't use the JD tuner much, but it is definitely handy at higher elevations.
Click to expand...

Interesting. I do run map 3, but my O2 is in an connected. Correct me if I am wrong, but if it runs poorly, I can remove the jumper, and it will be be the leaner map of set 3 that does seek feedback from the O2. Is this correct?
 
I had my TE449 in Colorado last summer It was stock running in the non power up mode (the jumper was out) It ran flawlessly from 8 K to 11 K.
 
Radar said:
I had my TE449 in Colorado last summer It was stock running in the non power up mode (the jumper was out) It ran flawlessly from 8 K to 11 K.
Click to expand...


Out of curiosity - did you run it in "jumper in" mode ie position "II" on the dash?

It sounds like if my map set 3 with jumper in starts to cause issues I can yank the jumper and probably be good to go.

ZipTy - I know you guys know this stuff in/out - does this seem to be the case with the Keihin EFI? I have to think the system comes with quite a bit of environmental sensors - they just don't list them as such as separate parts.
 
"Out of curiosity - did you run it in "jumper in" mode ie position "II" on the dash?"


No, I was on long trips and I needed the best fuel economy.
 
bigmo said:
Interesting. I do run map 3, but my O2 is in an connected. Correct me if I am wrong, but if it runs poorly, I can remove the jumper, and it will be be the leaner map of set 3 that does seek feedback from the O2. Is this correct?
Click to expand...


If I remember correctly the O2 sensor is automatically bypassed running map 2 or 3. So yes, if you disconnect the jumper to return to map 1, the sensor should tell the Keihin what to do. I never really ran map 1, did the jumper in the parking lot at the dealer to make sure the bike would be what I was expecting. The question I would have is if you will have the notorious flameout (stalling) problems in map 1... and if map 1 will suffice for the kind of riding that you want to do. The flameout problem seems to vary among bikes, set up and riders though. -Should note that I run an FM Powercore slip on and the vented TC airbox cover, and was frustrated with flameouts pre map 3.

I hear Auto tune is the way to go, but needs some set up time and is expensive. JD Tuner is a couple hundred bucks and is plug and play.
 
bigmo said:
So I found this thread on environmental input - specifically elevation and temp:

http://www.cafehusky.com/threads/altitude-compensation.27739/

Since this was sort of way when the Keihin on the 449 and 511, I thought I would check back among the experts here.

So each year, I make a couple of trips to Colorado. We typically START at 8K and go up from there. We will frequently top 13K. My home sits at 600 ft.

Right now, I am on BMW Set #3. As much as I could gather from the thread listed here is that the Keihin has a series of internal sensors (within the EFI) that continually adjust the fuel air ratios. I also gather that since my O2 sensor is off (race map II) it provides no feedback. I also gather that since it is a narrow band, it could not compensate for a massive elevation change anyway.

So, lets hear it - are the new Keihins able to compensate for massive changes in elevation and temp one would encounter with mountain riding?
Click to expand...



I believe there is a sensor somewhere in the intake that senses air density (elevation/temp changes) and corrects for them. Just FYI, I live in colorado and have never had any elevation related issues. I have race map 2, stock airbox, fmf powercore 4 with quiet insert, and JD tuner. I have ridden from CO Springs to the top of pikes peak (over 14k feet) WITH my wife on the back with no issues and no flameouts. The idle got a bit slower above 13k feet, but never died and still had power to get us both to the top. I have never adjusted the JD while riding to compensate for elevation, just some initial tweaking to get it where I wanted and I haven't touched it since.
 
bigmo said:
ZipTy - I know you guys know this stuff in/out - does this seem to be the case with the Keihin EFI? I have to think the system comes with quite a bit of environmental sensors - they just don't list them as such as separate parts.
Click to expand...
The powercommander 5 runs better than Map set 3. You can also run the AutoTune system which will automatically compensate for altitude changes and is the safest option.
 
Bryce said:
I believe there is a sensor somewhere in the intake that senses air density (elevation/temp changes) and corrects for them. Just FYI, I live in colorado and have never had any elevation related issues. I have race map 2, stock airbox, fmf powercore 4 with quiet insert, and JD tuner. I have ridden from CO Springs to the top of pikes peak (over 14k feet) WITH my wife on the back with no issues and no flameouts. The idle got a bit slower above 13k feet, but never died and still had power to get us both to the top. I have never adjusted the JD while riding to compensate for elevation, just some initial tweaking to get it where I wanted and I haven't touched it since.
Click to expand...

Would you provide your JD settings. I visit CO in the summer and my settings that work great in Phoenix are way too rich.
 
Tinken said:
The powercommander 5 runs better than Map set 3. You can also run the AutoTune system which will automatically compensate for altitude changes and is the safest option.
Click to expand...

I asked this question a while back but got no answer: how quickly will the autotune adjust to the elevation change? Is this instantaneous like a car or my GS? Or does it take the time for the AutoTune to create a map?
 
gillies said:
I asked this question a while back but got no answer: how quickly will the autotune adjust to the elevation change? Is this instantaneous like a car or my GS? Or does it take the time for the AutoTune to create a map?
Click to expand...

Takes time, wideband 2 is faster.
 
gillies said:
Would you provide your JD settings. I visit CO in the summer and my settings that work great in Phoenix are way too rich.
Click to expand...

I would give them to you but I will not be in country so will not have access to my bike for another month. I used rearwheelin's settings and just tweaked them a tiny bit from there, but I'm not sure what direction. His settings are HERE.
 
bigmo said:
So I found this thread on environmental input - specifically elevation and temp:

I read somewhere (can't lay a finger on it at the moment) that the Keihin system used the MAP sensor

http://www.cafehusky.com/threads/altitude-compensation.27739/

Since this was sort of way when the Keihin on the 449 and 511, I thought I would check back among the experts here.

So each year, I make a couple of trips to Colorado. We typically START at 8K and go up from there. We will frequently top 13K. My home sits at 600 ft.

Right now, I am on BMW Set #3. As much as I could gather from the thread listed here is that the Keihin has a series of internal sensors (within the EFI) that continually adjust the fuel air ratios. I also gather that since my O2 sensor is off (race map II) it provides no feedback. I also gather that since it is a narrow band, it could not compensate for a massive elevation change anyway.

So, lets hear it - are the new Keihins able to compensate for massive changes in elevation and temp one would encounter with mountain riding?
Click to expand...

I read somewhere that the system uses the MAP sensor on the throttle body on start up as a barometric sensor.
You may need to shut it down & restart at the higher altitude for it to self adjust.
 
You must log in or register to reply here.
Back
Top