[alfa] More on emissions

[Eric Storhok <alfa@xxxxxxxxx>]

Two Johns made comments about emissions, focusing on engine speed and the 
emissions cycle.

One follow-up.  Alfa did not specify the shift schedule used on the cycle, 
that was determined by the EPA, and is mostly common across all manual 
transmission cars.  Especially at that early of a law date...  It's 
possible to set a schedule based on a random shift survey, which people get 
in and drive- the average person's schedule will be the one.  Also, for 
computer control cars, one can use a shift light (which do work, actually) 
to prompt a shift.

I would find it questionable, based on all the emissions tests I've run in 
my life, that the car didn't exceed too many rpm's as people might 
think.  The max speed on the cycle is 50mph, in 5th gear, that is not 
high.  And the car will cruise in the 30-40mph range in 4th gear.  High 
speed are not good, either....

Also, even at high loads, at least one seen on any typical test, whatever 
emissions the engine makes, the emissions systems should be able to handle 
it- if it's working properly.   While 800ppm is a lot for a tailpipe 
number, it's not much for a raw engine number...

Eric Storhok
Ann Arbor, MI

AROC Detroit Homepage:  http://www-personal.umich.edu/~alfa/index.htm
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