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Adding cat to non-cat 8 valve Posted by Pyrrhic [Email]  (#1124)  [Profile/Gallery]
(more from Pyrrhic) on Mon, 17 Dec 2012 09:42:44
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So my C900 is a 1987 8 valve without a catalytic converter. The car was originally sold in Belgium and hence didn't require emmisions equipment. There are three main reasons why I would want to put a cat: one, I live in Germany and as long as the car is less than 30 years old there are higher road taxes for the car for it being cat-less. This leads to reason number two, without the cat this cat is considered a polluter and I cannot go into the centers of many German cities. I have been to Frankfurt before, into the Umweltzone where this car is actually forbidden, and had I been caught it would be at least a 150 Euro fine. Three, finding an exhaust system for a non-cat car is getting very hard as most C900 is same age have cats. Thsi leads to my quest for adding a cat to the car.
I have been asking around here about cat to non cat exhaust fitment, and I was told to check out with ANA if they know who had a bunch of test pipes for C900s in Sweden, and I wasn't able to get a positive answer.
This then leads me to do one of two things: one, install a cat-back exhaust with a pipe welded into it to reach the end of the downpipe, covering the length of the missing cat. This would solve the exhaust question but not the others. Or, two, install a catalytic converter and a cat-back exhaust. This would solve all issues.
So, getting that out of the way (I write a lot, bear with me), I am left with the question at hand: can I just add a cat to a non cat car without the accompanying lambda sensor (aka oxygen sensor)? What would happen if I ran the car with a car but no lambda? If that is not advisable, then what do I need to add to the current system? Is the Oxygen sensor a plug in into the existing fuel injection system or is it not? What I am looking for here is for the most economically viable and simplest way to add a cat to the car. Whether it is doable or not, and at what cost is what I am concerned with.
If the answer is not, then I'll go to option one, install a new cat-back exhaust, and lengthen it to reach the downpipe.
posted by 87.182.20...
, Mon, 17 Dec 2012 09:42:44 <-- Viewing This Message, Fri, 21 Dec 2012 15:44:25
, Mon, 17 Dec 2012 10:17:15
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