• 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 The previous version was outdated and no longer supported.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!

TE511 Altitude Tuning?

Bryce

Bryce

Husqvarna
A Class
I spent part of the winter in Southern Arizona with my bike and put on about 1000 trail miles. My bike has the race map II jumper, powercore 4 slip on, JD tuner with Rearwheelin's settings, and everything else is stock. The bike flat ripped down there. Now that I came back home to Denver, the bike runs like crap. Poor idle, way lower power, and much slower to rev. I thought these EFI bikes were supposed to automatically adjust for elevation changes? Is it because I have the Jumper in which (correct me if I'm wrong) disconnects the exhaust O2 sensor? The elevation change is from about 800 feet to about 5200 feet. Any input would be greatly appreciated.
 
The racemap 2 jumper disables the O2 sensor, and even if it did work I'm not sure about it's ability to adjust for vast altitude changes. Basically you've got a lot less air for the same amount of fuel (ie. your A:F is uber rich), what you need to do is lean out your JD settings to compensate.

EDIT: I've seen the number of 3% reduction in power per 1000ft of altitude when fuelled properly, so at altitude it'll never feel as powerful as it did closer to sea level.
 
I have allways had the race map plug from day 1 . I have road from 800 - 10,000 feet before I had my JD and never any fueling issues . With my JD I have yet to ride in the high altitude. I have tinkered with the idle a little and got it idling really good with a nice idle to low end transition but found the settings were too lean and made the bike run hot.
 
My 449 is stock, no jd, no pipe, stock. I've ridden it in map II starting at sea level and have taken it where my ride started at 5000' and up to 8200'. I can tell ya mine compensates excellent for alt.change. I think perhaps since you have a secondary tuner, it is overriding the stock ECU. A better answer might come from Kelly (Motosportz). He goes from sea level to mountains up there in green country.

However my guess is the JD would need to be fiddled with to give you a new baseline.
 
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