>
>
>>> My question is: I see so many older and even new cars with obviously
>>> modified exhaust systems. Whats the catch here? How can *they*
>>> get away with it? Can I change to a *sportier* exhaust system and
>>> still pass the smog exam?
>
>I have headers and a SuperTrapp muffler on my TR-6. My secret is to pick
>a sympathetic smog mechanic who just puts me on the machine and I pass.
>Since there's not catalytic converter and no EGR on '72s,
>the exhaust system is pretty much irrelevant, smog-wise.
>
> --berry
>
>
>
The solution is really quite simple.
If your vehicle is equipped with a smog pump and EGR system, and you
want to add headers, it is not difficult to put a cat.conv. just below
the collector.
Second step is to drill a hole in the collector for welding a fitting
for the EGR tube.
Although, in my opinion, a smog pump, which actually just pumps fresh
air into the exhaust is a cruel hoax by auto manufacturers. It reduces
the % of CO and hydrocarbons by merely pumping in additional quantities of
raw air. Thus, fooling test equipment into thinking that solid emissions
comprize a smaller % of the total exhaust gases.
And of course, we all think that the expensive smog pump does us some good.
Best Regards,
Tony
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