11 replies to this topic

[Tom Hampton]

Okay, so my trans tunnel notch interferes with my catalytic converter. I want to keep the car streetable (able to pass emissions...I've still got five years of tests to pass). What have others done to remount the cat.? Is there a different dimensioned cat. available aftermarket? Do others move the cat. farther downstream? Cutoff the flanges of the cat. and reweld to rotate the cat-body?

I'm okay with making mods between street and track config---including swapping street vs. track exhaust. I've ordered a cat. repacement pipe from mazdaspeed...just so I can get the car on the ground. But, I'm still looking for a solution that puts A cat. back into the exhaust system when in a street configuration.

I searched the old site, but didn't find anything useful.

[Scottie]

I know that rally cars put the cat as far back as possible (towards the tail pipe.) There is plenty of room where the muffler used to be. I am sure you can weld a couple pipes/flanges to a cat and make a quick and easy way to get a cat in and out, right by the rear axle.

[Johnny D]

Why don't you keep your stock exhaust with the cat/muffler to pass emissions and put on a racing exhaust or are you doing SSM.
J~

[dstevens]

Why don't you keep your stock exhaust with the cat/muffler to pass emissions and put on a racing exhaust or are you doing SSM.
J~

That's what he wants to do. With the trans tunnel mod the cat doesn't fit.

[Johnny D]

Gotcha.
Note to self, don't speed read.
J~

[HoneyBadger - BrianW]

How about just leaving the cat out and getting some type of O2 simulator to remove the code (for the street only). If your car doesnt throw a code they should not stick a sniffer in the tail pipe... at least I dont think they would on these cars. I know on my newer 2007 Mini Cooper that is the case.

[Tom Hampton]

On cars without obdII...they always do the sniffer...at least, round here.

[Tom Hampton]

I was thinking this afternoon that I will bolt the catalytic converter to the conversion pipe and cut and re weld the rear flange at the new end location.

Anyone see an issue with this approach?

[HoneyBadger - BrianW]

On cars without obdII...they always do the sniffer...at least, round here.

My bad, thought you had a 99.

[Tom Hampton]

My bad, thought you had a 99.

Np...building a 92. 1.6 forever! Or, at least until I get a 99.

[Gunpilot]

I also have a 1992 and am in the same boat. I have the Mazdaspeed eliminator pipe and will need to get inspected in about 5 months. Keep us informed of what you find.

[Tom Hampton]

As with everything else...I'll take lots of pictures.