Been some good info on this thread. No question that today's scientific
approach is very good. If you can figure out how to tune based on the
data you get. One of my Ardun friends has a laptop computer with a
program. He tuned his Ardun car on a chassis dyno until it was at its
peak, input the weather data at that moment into his laptop, now he had
a baseline. So later when he went to Bonneville or El Mirage, whatever
weather data prevailed any time during the meet, he put it into his
laptop which told him what jet to run on his mechanical fuel injection,
to match the conditions to the day at the chassis dyno.
And, said he, it all worked like it should, he got the best out of his
equipment.
Now this sounds like expensive gear to me. But worth the money if you
can afford it.
However at the risk of being hopelessly anachronistic, fellow novices
should know that some of my other Ardun friends, who also hold important
Bonneville Records, don't even bother with an Air Density meter. They
tune by the speed of the last run, their perception of the weather
conditions, the appearance of the plugs, the percentage of nitro they
want to run, and instinct. In other words, lots and lots of experience
can also give excellent results. Experience. There's no substitute for
it. Cheers Bill
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