Explain map at idle
10-20-2010, 02:57 PM
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Explain map at idle I am a bit confused on the physics of map, I know at idle you want the most vacuum possible.
I assume that means you want the highest map possible at idle.
At the same time, isn't vacuum a pressure difference? So does thy mean you want the map reading as low as possible? Meaning a greater pressure difference between the engine and atmosphere?
I assume that means you want the highest map possible at idle.
At the same time, isn't vacuum a pressure difference? So does thy mean you want the map reading as low as possible? Meaning a greater pressure difference between the engine and atmosphere?
10-20-2010, 03:58 PM
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Highest vacuum is lowest MAP.
The less air (hence fuel) you need the more efficient you
are. That's about as good a measure as you can get, for
idle tweaking.
Of course the same also holds for part throttle loads like
towing, if you could get the load steady enough to be
useful in tuning you could maximize fuel economy by
chasing it to minimum there too.
The less air (hence fuel) you need the more efficient you
are. That's about as good a measure as you can get, for
idle tweaking.
Of course the same also holds for part throttle loads like
towing, if you could get the load steady enough to be
useful in tuning you could maximize fuel economy by
chasing it to minimum there too.
10-20-2010, 04:02 PM
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