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Re: [T3] air intake for carbs


<x-charset iso-8859-1>Hello-

> It doesnt sound right that the air around the tranny is hot? When the
> car is going at 50 mph there should be a lot of turbulence under there,
> which in my book means that it is a low pressure area.

There are very few cars than can have much of a low pressure under the car
at high speeds.  Low pressures under the car create suction and make the car
stick to the ground - a very desirable thing.  The new Ferraris have this.
Even the Porsche 959 did not.  In fact, for it's time, the 959 was
revolutionary because it had zero lift.  As groovy as our Type 3's are, we
aren't in this class of aerodynamics :-).  At high speeds, we get lift.

As a sidenote, it is because of the high pressures under the car that
leaving out pieces of sheet metal that seal the engine bay up on a Type 1
car is such a bad idea...


> Anyways, if he
> pulls air in front of the engine, it surely wouldnt be hot. When
> standing still with hot engine, well that could be a whole different
> discussion.

You are correct: it certainly isn't as hot as the engine compartment itself.
Compared to using typical aftermarket dual carb air cleaners, it's
definately a better idea.  But, it's hotter than the air he'd get from the
louvers in the fenders.  The air near the asphault tends to be hot.  The
transmission gives off its own fair share of heat, too (1 hp wasted by the
tranny means 746W of waste heat... if we very roughly guesstimate ~3hp used
by the tranny, that's ~2000-2500W of waste heat, which is a notable amount).

I considered routing the intake air forward above the tranny for quite
awhile.  It seemed easier to fabricate :-).

Take care,
Shad Laws
LN Engineering - Aircooled Precision Performance
http://www.LNengineering.com

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