From: Sergio Dimarmo
>>Jarrid Gross (Yorba Linda, CA) wrote:
>>
>> 3) If your car runs rich, go to the auto parts store, and buy a
bottle
>> of
>> "Smog test" additive. These additives contain mostly Isopropyl
alcohol,
>> which brings along some extra oxigen. The AF ratio for buring
IsoPropyl
>
>Hey, you're in Yorba Linda. Where can I buy that additive? I'm in
Laguna
>Hills but I have friends in Yorba Linda that could get it for me. Is
>that the proper name?
>
>Sergio
I think the stuff is called "Smog Test". It generally has a garauntee
that
if you dont pass your test, you get a refund. Forget the refund part,
if it
doesnt work, you have more pressing concerns.
I used to think the "smog test" was a "sham" to get you to buy something
that you really dont need. This was until I read something about
gasoline
additives, and smog testing. After reading this, I went back to see
what the
secret potion of the "Smog Test" . It was various alcohols, but mostly
IsoPropyl.
The chemistry speaks for itself, and it takes more mass of alcohol to
stoichiometrically combine with oxigen.
I would tell you to just go out and buy half a gallon of Isopropyl, but
it's
tough to get it in a non-medical grade, which generally has 30% water.
The proper mix of Isopropyl to gasoline would be between 5 and 10%
by volume. Ethyl alcohol will also work, but can be somewhat corrosive
to fuel system parts.
Start off with say 2 gals of 92 octane gasoline from a high turnover
gas station, and add a pint to a quart of "smog test" or the alky.
When the test is over, dilute the alcohol down with more gasoline
to prevent a continuous lean condition.
Jarrid Gross
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