That is exactly correct, and what I have been looking for is equations
to figure out the the right number.
On Mon, 03 Jul 2000 21:19:17 -0700, Bullwinkle wrote:
>This response is just hypothetical and I have no hard facts, but:
>
>At a higher altitude the air density is less. Even though you are compressing
>it
>at the same ratio, the compressed charge would have less density. This is the
>same effect as compressing the air at a lower ratio at sea level, i.e. air
>compressed with a lower ratio has less density than one compressed with a
>higher
>ratio. We know that lower compression ratios need less octane at sea level, so
>it would make sense that at higher altitudes a lower rated octane would be
>needed.
>
>
>
Andrew Lundgren
Lundgren@iname.com
http://www.itwest.net/~lundgren
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