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Temperature sensitivety

commando tod

Cruisin' Guzzisti
Joined
Nov 1, 2008
Messages
138
Location
Essex
Over the last couple of years I`ve noticed that the 1100 Griso seems to run smoother, with less popping on the overrun when the temp is at 18 deg C than it does at 20 deg C. When the ambient temp is 15 or lower, it runs real well. I haven`t got around to installing the new map so was wondering if installing this would smooth it out at higher temps. Got good contact between temp sensor and head, stepper motor works as good as the day it left the factory (I`m just Jinxing myself now), plug colour ok, and everything else looks ok on the VDSTS, So, Is it me being pedantically anal or has anyone else noticed this?
 
Cooler air is more dense than hotter air ,ie more Oxygen,hence intercoolers on turbos. Currently starting Winter here in Oz. My G11 loves it coming home from nightshift at 6 15 ish am. Good thing the coppers arent about. The PCV A/T and ECU reflash help make the most of this.
 
My 2009 G8V lives near to Equator, I wish I can ride it in cooler air.

The highest ambient temperature recorded by the dash is 36 deg C (96.8F), lowest being 26 deg C (78.8F). No noticeable difference before and after the #068 map in terms of smoothness at higher or lower ambient temperature.

If the bike runs better in cooler temperature, it is likely the effect from the grey matter in my helmet being run cooler.

Phang
 
No, I think all (esp. air-cooled) engines run better in colder air. As said, more oxygen, and thus a richer injection due to the temperature and O2 sensors. Noticeable in the engine response ... and the decreased autonomy (increase occurs when temps drop under 15-10ºC on the dash).
 
I`ll get around to installing the new map when we return from vacation and see how much difference it makes thro` "seat of the pants" dyno.
 
My 1200 Sport popped on overrun so bad I hated riding it...added resistor(s) to the air temp circuit (3200 ohms), and no more popping...it thinks it's 20 degrees cooler. Great fix.
 
pumpman said:
My 1200 Sport popped on overrun so bad I hated riding it...added resistor(s) to the air temp circuit (3200 ohms), and no more popping...it thinks it's 20 degrees cooler. Great fix.

But then wouldn't the Lambda sensor correct the mixture, leaning it out?
 
IIRC, the closed loop injection control can compensate for modifications in the set-up to up to about 20%. But that's for things like replacing the muffler; I don't see how it would be able to compensate for a modified sensor reading unless there's input redundancy (i.e. another temp. sensor).
 
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