>> Is anyone using a K&N filter in place of the factory airbox?
>>
> A K&N filter will cause you to fail smog inspection in California so
> if you
> get one, hang on to your original parts. I'm not convinced that
> these offer
> improvement, however. When underhood temps soar, you're taking in
> intake air
> that's very hot and thin, whereas the original setup takes intake air
> from a
> cooler spot ahead of the radiator. Cooler air is denser and packs
> more
> energy
> into the combustion chambers.
> Fred Smith
> Orinda, CA
>
Quite so. I have a K&N on my TR8 and it DOES offer some initial
improvement after the car is first started. You can really feel it.
However, Fred is right, as soon as underhood temps grow, the benefits
diminish drastically. You can pop off the little corner cover (which
is where a carb'd car gets some of its air) and get a little extra cool
air from there but what you REALLY want to do is to replace the whole
airbox with something that breathes better AND gets cold air too. It's
on my list of things-to-do.
For a great example of how to do this, see:
http://www.thrashercharged.com/store_htm/induction_group.asp
(my other car is a supercharged Bonneville SSEi :-)
Jim
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