Miata Mailing List: August 1993, Message #106
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   From: Ken Warren 
Subject: Re: High Engine Compartment Temp
   Date: Sun, 15 Aug 1993 21:45:50 -0400


WRT hood spacers and similar stuff:

It isn't really needed. According to a reliable source, and with
verification of the results by myself, the temperature in the air intake
snorkel with the engine up around 6 grand, after 10 minutes on the
highway, is still only 126 degrees F. Given that you can get cooler air
from outside the engine compartment, the difference between 126 degrees
and the outside temperature is only going to gain you *maybe* 5 horsepower
tops. And that gain isn't enough to be worth the cost of ruining the lines
of the car, or the expense of something like the Jackson Cold Air
Induction kit. The temperature difference accounts for only part of the
Jackson system's improvement, of course. The rest comes from the forced
induction design of the intake.

Though I *do* wonder about the temperature of the air as it enters the
intake manifold, after traversing that long black plastic tube that passes
right in front of the engine and right behind the radiator... I wonder if
heat-shielding the duct would make a difference?

--
Ken

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Ken Warren             |"Nothing good has ever been reported about the
| full rotation of a race car about either its
E-Mail: kenw@netaxs.com| pitch or roll axis."            Carroll Smith
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