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 The previous version was outdated and no longer supported.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

Lean Condition Thought...

TR650 Mike

TR650 Mike

Husqvarna
B Class
So it seems as though for the most part that the general consensus is that the TR650 runs lean from the factory. The objective of the eruption, wuka king, and the PC5 is to richen the AF ratio in order to overcome this issue...

So my thought :thinking:. I just got done performing the "Pod Mod" and I have yet to take the factory filter out. With the two filters in place air flow would be restricted and the AF ratio would be richer... Has anyone else tried this approach? Will the computer compensate? Or is the stock computer only trained to deal with a certain air fuel map for varying temperatures?
 
The AIT sensor deals with the ambient temperature. The o2 sensor deals with oxygen and fuel levels present in exhaust stream. AIT mods like the eruption are eventually negated by the ECU and the stock settings take over again. The one exception seems to be the Wuka King but I can't speak to that particular device. The o2 sensor is the workhorse of the sensor system. It changes voltages to sent to ECU dependent on how much oxygen or fuel is present (Ie. too rich, or too lean).

The ECU is always samping those voltages. It is programed to have the injectors mix fuel with air based on the voltages it receives from the o2 sensor. One of the main tasks of the ECU is to change settings to accommodate the o2 sensor voltage samplings. Of course it's logical that more air or less air does come into play

However, the pod filters surface area is (supposed to be) nearly identical to that of the flat surface area of the OEM filter (just slightly more surface area).

Theoretically it meets design criteria whatever the heck they are. Perhaps the old filter left in place would work but maybe not. I've not tried that.

AFR might be richer but likely not, because the o2 sensor will compensates by sending corrected voltages based on the real time exhaust stream oxygen and fuel content. Whether it can compensate for a restricted air flow...I dunno. But an interesting observation none the less.
 
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