Smelling like ass....

[Max777]

Originally Posted by RETed

Problem is that emissions usually means restricting performance.
That would be a better question?
If we were willing to take a hit in performance, I'm sure having a cat wouldn't be a problem...

Most cats, even "high flow" ones, are restrictive.

-Ted

IF you happen to read grassroots motorsports, you would know that that is not quite true.

if you run a spun cat on a miata for example, then it gives you a better power band than a test pipe! Also, if you run that wierd stack exhaust that dumps right after the header, it doesnt give any more gain than a good rear exit system, just more noise, so on an NA, a high flow cat does not decrease the flow so much that it robs the car of horsepower.

You know your shit, but aftermarket catalytic converters have advanced a lot further than most people think.



So if it isnt the removal of the cats and air pump, then what causes the fumes in the passenger bay? I want to eliminate this problem if possible.