Off to see the Wizard
- Thread starter Nutty
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That's in conflict with the original press release posted above.
The air-cooled one was visible on one of the cylinders, I have never found it on either of my LCs - I am happy to be proved wrong!
Do you know where it hides so I can go looking for it
Thank feck someone actualy read their manual, those that have claimed to do so need to pay a visit to their local optitions
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I also recall reading the LC didn't require knock sensors. I do think my EU4 bike has more wiring out to the heads, though.
Thank feck someone actualy read their manual, those that have claimed to do so need to pay a visit to their local optitions
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Yeah but OE means having the optional 91 RON mod for when using shitty fuel - it's on a page close to that one.
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Hi Mark,
Thanks for coming on to give your thoughts.
Would you be able to.comment on whether slippage was possible? And this giving a difference in readings.
Also are you able to advise if the LC has lambda correction? Anecdotally previous generations seem to have it. I only ask as discussion has included debate on whether the ECU would eventually adapt to a less restrictive exhaust given enough time by reverting to stock AFR.
Any insight you could give would be appreciated.
Oh ok haha. Sounds pompus but I've always had new bikes so wouldn't know, never keep older ones long enough.
Fat Biker 66
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My Mapping on Saturday
Dear All
I profess to be an dyno idiot but FWIW. I was first on Saturday - full Akro exhaust Euro 3 and no baffles!) Mileage 1800, GS LC Euro 4. Asda 95 petrol. I ride it in Dynamic. I went as the fueling was rubbish and a dead spot at 3.5K. This I didnt mention to anyone till afterwards as I was sceptic . Dead spots gone. Rides much smoother Map is below.
Mike
Dear All
I profess to be an dyno idiot but FWIW. I was first on Saturday - full Akro exhaust Euro 3 and no baffles!) Mileage 1800, GS LC Euro 4. Asda 95 petrol. I ride it in Dynamic. I went as the fueling was rubbish and a dead spot at 3.5K. This I didnt mention to anyone till afterwards as I was sceptic . Dead spots gone. Rides much smoother Map is below.
Mike
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HilltopMark
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Interesting. My bad for assuming that because the previous model had one that the latest one would too. One of the major briefs of Euro 4 was reducing oxides of nitrogen, so BMW must use a system for detecting and managing abnormal combustion scenarios including detonation. Knock sensors are not the only way to detect detonation. I'm speculating now but I wonder if they use exhaust gas temperature or monitoring resistance across the spark plug gap. Or some mixture of those strategies.
Yep I was curious about how they do it, if they do? Maybe they don't need detonation detection as they allude to in the press release because of the redesign of the combustion chamber? Also they no longer need two plugs to get good combustion. I don't see anything to measure exhaust temperature but they might have hidden something somewhere?
I am curious to how one measures resistance across the spark plug gap.
I assume that a Hilltop re-map essentially enrichens mixture and gets improved fuelling by compromising on emissions, I assume that you do not adjust the ignition timing?
fredaroony
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My bike was in Dynamic Pro, on the day. When I left, it was still in Dynamic Pro. The 'before' difference is a head scratcher, for sure. I gernerally run my bikes in hard, and don't baby them, so it's had the taps open regularly. I only run the bike with super unleaded, if that makes any diffference.
You thinking of your XR? The GS is just Dynamic right?
HilltopMark
Registered user
It's possible, or they do the opposite and measure the sharp increase in engine temperature that accompanies the drop in exhaust temps. Am just guessing. Measuring knock via passing a voltage across the spark plug gap after the spark that causes combustion has been around for a while. My understanding is sketchy but I believe the shock wave caused by detonation causes the resistance to voltage crossing the gap to change, with this change being detected by the ECU and an anti knock strategy (retarding the timing) being implemented until the readings return to normal.
Rain mode definitely reduces the maximum power
Interesting but BMW say that "no knock control is required" - from that I read that they use no method of knock control? It is also interesting that they offer the option of a different ECU program for poor fuel countries, I would assume, that they change the ignition timing and fueling set up so that the engine remains 'safe' when using les than 95 RON fuell (down to 91). However if you go for this option the power is reduced and fuel efficiency changes.
I'd like to see that stated by BMW and by how much, nothing in my 2015 manual about that.
You thinking of your XR? The GS is just Dynamic right?
Nope, the new GS has Dynamic Pro.
fredaroony
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Wonder what the difference is between the old Dynamic then.
No it doesn't - in respect of power it simply softens the throttle map.
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