Miata Mailing List: December 1998, Message #448

sponsored by

On 2 Dec 98, at 19:05, Jyri J. Virkki wrote:

> Your driving circumstances make a big difference. The CAI does provide
> very nice extra power at high speeds. If you spend a lot of time full
> throttle above 100mph like some extremely lucky autobahn-frequenting
> listers (hi Werner), it reportedly makes a huge difference. If you do, buy
> one right now.
.....
Hi Jyri!   :-)
.......
> 
> I judge it based on my driving, which is either city or crowded
> california/NJ highways. I very rarely see more than 80mph, too may
> cops and too many dumb laws by braindead politicians seeking favors
> instead of common sense. At these low speeds, the CAI gives me no
> perceivable extra power whatsoever.
........
Here´s something else on this issue that I think was not posted yet: When I got 
my CAI in 1995, I did quite extensive temp measurements with the stock setup 
and the CAI. While the CAI feeds your engine with air that is very close to 
ambient temps at any moderate cruising speed, stop and go in town on a hot 
day is very different. In that case, the JR CAI is a HAI, as the hot air from the 
radiator goes up and into the intake whenever your car stands or crawls. IIRC, 
peak temps under these conditions were just as high or even higher than at the 
stock intake point.
So maybe the JR CAI is not the thing to get if you are into stoplight races (not 
to say that you are, Jyri ...).

FWIW, YMMV

Werner