A few years ago, there was a guy (forget his name) who successfully raced a
100M
who claimed his car performed better without the cold air box. I believe he
used
ram pipes.
Could be the benefit of the cooler air and (minimal) ram effect was more than
offset by the air having to make the sharp, 90-degree bend into the carb throat.
bs
********************************************
Bob Spidell San Jose, CA bspidell@comcast.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
********************************************
> Best I can come up with using gas flow rates is about a 15% increase in
> mass flow with a drop in temperature from 200 deg.F to 100 deg.F taken at a
> standard atmosphere (0 psig or 30 inches HgA).
>
> Of course this doesn't take into account the actual ratio of additional
> Oxygen entering the carbs or the effects of the additional pressure drop
> through the trunking.
>
> Using the temperature change effect on air at critical flow (which a
> carb does not achieve) the increase in mass flow is much less, an increase
> of about 4% from 100 deg.F down to 60 deg.F.
>
> I suspect the air flow mass increase for the cold air box is somewhere
> in between.
>
>
> CB
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