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Old 04-28-2010, 03:27 PM   #13
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Joined: Jun 2004
Location: Nor Ca.
Oddometer: 5,002
Originally Posted by JoelWisman
I agree with your post above Griz, but will add a few things.

Yes the F800GS will compensate for a more free intake and exhaust to a point. It does have an oxygen sensor and a learning fuel map.

Base idle and closed throttle decel are NOT compensated by the F800GS but rather on a fixed fuel map.

All of them pop some on decel and this is much louder with aftermarket exhausts at least partially because the exhaust noises are usually much less muffled.

If power is all that one cares about then lambda (14.7 : 1 by mass) is not what you are looking for, you are looking for a somewhat fuel rich mixture.

This will be helpful to exhaust valves, tend to foul spark plugs, suck from a hydrocarbon and carbon monoxide emissions standpoint, destroy the cat, and reduce fuel economy, but will increase HP slightly
Sounds like this is the reason for the the slight stumble, when slowly trying to ease over things just off idle. If it is, than doesn't sound like there is much that can be done about it.
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