Interesting SD Fuelling Article

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Colonel_Klinck
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Interesting SD Fuelling Article

Postby Colonel_Klinck » Fri Aug 03, 2012 7:18 am

"They lie about marijuana. Tell you pot-smoking makes you unmotivated. Lie! When you're high, you can do everything you normally do, just as well. You just realise that it's not worth the f*cking effort. There is a difference."
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Jermo
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Re: Interesting SD Fuelling Article

Postby Jermo » Fri Aug 03, 2012 9:51 am

Great find Gin!
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Willh
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Re: Interesting SD Fuelling Article

Postby Willh » Fri Aug 03, 2012 12:16 pm

What .... we can do all that to our Superdukes :lol:
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Re: Interesting SD Fuelling Article

Postby DribbleDuke » Fri Aug 03, 2012 2:01 pm

I'm BLUE

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Re: Interesting SD Fuelling Article

Postby SDNerd » Fri Aug 03, 2012 4:51 pm

How quick we forget ... viewtopic.php?f=1&t=19460&p=231326&hilit=Motorcycle+Consumer+News#p231326

BTW - they totally dorked on the interpretation of "Open Loop" v. "Closed Loop". "Open loop" is a non-feedback scenario. Removing the 02 sensor (or turning it off), put ANY ECM into an open loop state; in the case of the SD, mapping no longer adjust to achieve an "ideal" (KTM's version of ideal anyway ...) air-fuel (A/F) ratio.

"Closed loop" operation would be in using the O2 sensors. That is, the O2 sensors close the feedback loop; where the EFI relies on not only the input parameters of air temperature (and some systems, humidity), air pressure, engine speed, throttle position, in some instances gear selected, bike speed, engine temperature, etc. These sensors as most of you know, measure the oxygen content in the exhaust stream, and fueling is modified (algorithmically or by map selection) dynamically to achieve an optimum (again, an optimum according to a given manufacturer, and regional emission control requirements ...). Without O2 sensors, there is no "feedback" whatsoever, and as a system, the EFI is effectively operated "open loop", with the arguable exception of the riders right hand being involved.

EDIT: Another thing they dorked on, is that an EFI will try to push the fueling to the "ideal" stoichiometric A/F of 14.7:1. This is simply false. Not only is it not the case, but this would be too lean in most scenarios where an engine has to live a while. On occasion, I've run into tunings where under some conditions, an engine might see 14:1 ... and that's pretty damn lean.

While I generally find the US MCN to be about the best moto rag on this side of the pond, like RRW, it can be pretty amateurish at times. That's OK, still good stuff.

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Re: Interesting SD Fuelling Article

Postby gezza47 » Mon May 06, 2013 3:29 pm

Is there a link to part three- TuneECU- somewhere? I can't find, except for the cover of the issue the article is in.
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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 2:43 pm

Part 3 is in the August 2012 issue and part 4 is in the September 2012 issue of Motorcycle Consumer News. Their web page is out of date and half dead. They don't have part 3 and 4 linked on their web sight. The back issue link is dead, so you'd have to contact MCN to see if you can get the back issues needed to finish the series.

I'll see if I can scan parts 3 and 4. Just don't tell on me.

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 4:53 pm

Part 3 page 1 0f 4

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 4:56 pm

Part 3 page 2 of 4

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 4:57 pm

Part 3 page 3 of 4

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 4:58 pm

Part 3 page 4 of 4

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 4:59 pm

Part 4 page 1 of 6

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 5:00 pm

Part 4 page 2 of 6

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 5:01 pm

Part 4 page 3 of 6

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 5:01 pm

Part 4 page 4 of 6

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 5:02 pm

Part 4 page 5 of 6

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Re: Interesting SD Fuelling Article

Postby Paulzilla » Wed Jul 17, 2013 5:03 pm

Part 4 page 6 of 6

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Re: Interesting SD Fuelling Article

Postby gezza47 » Wed Jul 17, 2013 10:31 pm

Thanks
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Re: Interesting SD Fuelling Article

Postby jambox » Fri Jul 19, 2013 4:46 am

Nice one Paul.

Is this topic stickied/in the must read list? If not it should be.
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Re: Interesting SD Fuelling Article

Postby Knightly » Mon Jul 22, 2013 1:07 am

Sticky! Expensive conclusion though...

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Re: Interesting SD Fuelling Article

Postby LeDuc » Wed Oct 14, 2015 11:14 pm

Just bumped into that thread and it looks like the links to Parts 3 & 4 of the article are no longer working. it someone has them it would be awesome as the article is quite interesting.

Thanks


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