Miata Mailing List: May 1995, Message #98
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   From: Michael_Scott-RVFT60@email.sps.mot.com
Subject: Air Flow : Better = Cleaner?
   Date: Wed, 3 May 1995 10:18:24 -0400

After "Pepper's" Jackson Racing modifications (SS catback, header & cold air 
induction) were installed, I took him for the dreaded, new and improved 
[dynamic] air emissions test yesterday.

I thought I was sunk right away .. popped the hood, and the whole crew at the 
inspections station was called over to have a look.  Thought I was in trouble 
(non-stock equipment?)  but I guess they were just looking at the new header and 
induction box.  Anyway, I'm happy to report the following:

POLLUTANT       ALLOWABLE (GRAMS/MILE)  ACTUAL (G/M)    ACT. AS % OF ALLOW.


HC                  1.20                    0.03            2.5
CO                  20.0                    0.8             4.0
NOX                 2.5                     0.1             4.0 

How much of this is attributable to the new systems?  Can't say for sure, but 
they sure couldn't have hurt much!

I'm still experimenting with the new stuff .. one facet is noticeable right 
away.  If you're in, say 4th gear and are at around 2K revs .. instead of 
downshifting, the acceleration realized by just tromping the gas pedal will 
bring a  to your face right away .. 4th gear almost seems like 2nd gear now!

More reports later,


Mike Scott & "Pepper", who sure seems to like his new and improved breathing 
system.