You have a big clue as to where the smell is coming
from with the deposits on your bumper. The deposits
are caused by the unburned additives and other stuff
from the gasoline. Back in the lead days, my bumper
and trunk lid had a definite coating. Mechanics all
said rub your finger across the residue. If its white
its OK, black and sooty indicates you are running rich
which is also OK as long as you don't carbon things up,
Black and oily is bad news. If you are really curious
you can find someone to run an exhaust analyzer and
find out what the engine is doing.
There is a definite low pressure area behind the Tiger
when driven at speed. This is what is blowing the
exhaust back and depositing the residue. I have
driven in rain with the top down only to have the
rain blow over the windshield and get trapped in the
low pressure area and blow back in the car. Your face
is dry but the back of your head is wet from the
rain blowing in from the back. This indicates the
power of the low pressure area behind the car. You could
play a game and vary the length of the exhaust to
see if it'll help. I doubt you can get the pipe long
enough to work without looking stupid.
All you can do is make sure your trunk seal is
really good and seal all other holes in the back.
Holes in the firewall should also be closed.
CO is colorless and odorless. On long trips if
you get a headache, you are getting a warning.
Time to stop and get some fresh air.
I'm running 2 inch Walker Turbos on my car.
Once blown out, they sound great. Guaranteed
for life and available with just about any combination
of inlet and outlet sizes and positions.
Dave Johnson, B382002668(under repair) Aurora, IL
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