[DeTomaso] Optimal Air Fuel Ratio Question

[asajay at asajay.com]

<deer in the headlights look>

8|





Quoting Daniel C Jones <daniel.c.jones2 at gmail.com>:

>> Does anyone have a table or chart handy showing how many Holley jet  
>>  sizes you should change per 1000ft of elevation change?
>>
>> Doug Braun
>
> Do a search on Air Density Ratio Charts. At high altitudes (actually at any
> altitude above 0' msl.), the diameter of the main jets varies proportionally
> with the fourth root of the air density ratio at a particular altitude
> in order to
> maintain a constant mixture ratio at that altitude.  For instance, if Holley
> used a .100" diameter main jet for a standard (sea level) setting, and your
> local density ratio is .8, you should use a .946" diameter main jet in order
> to maintain the correct mixture ratio.
>
> Dan Jones
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