So, Recently i developed the dreaded 1600~1700 RPM carsound cat rattle.

it really annoyed me. So today i pulled the cat off, and what did i find?



Not so good.

Took a screwdriver, broke the loose honeycomb up, knocked it out, and this is what came out:



Car sounds MUCH smoother now, feels marginally better as well.

and for the heck of it, here's some more eye candy



SMSP bottleneck eliminatory:

 

That is one way to fix it.

 

hmm ur car prolyl dun pass smog ne more eh.. isn't that honeycomb stuff really not good for you? one dude told me it's toxic.. but i dun think theyd be allowed to shove it in a cat if it was.

 

It probably will, there's still about 2/3's of the catalyst in there, not that i have to worry about emissions anyway, here in Richmond we don't have no stinkin emissions tests!

As for it being toxic, it probably is, i have a killer headache right now after messing with that stuff.

Thank god for vicodin.

 

haha hope u feel better man.. yea I wish we dind't have emission regs in cali but then our sky would probably look liek tokyo's

 

how long have you had the cat and what was your AF looking like?? thanks!! and i dont think you will be able to pass smog, well not cali emissions anyway.

carsound cat=

 

i've got the rattle now too.. nice solution.. i might 1/2 gut mine too!

 

Had it for all of 6 weeks when it started rattling, granted that 6 weeks was running the stock fuel curves, it has since been leaned out considerably.

 

Does your car stink now? Or is it still tolerable?

 

what are other High flow alternatives to Carsound?

 

interesting.

that's one way to do it

 

No difference in smell as there still is a good amount of catalyst left inside. the sound difference is awesome tough, that rattle really made the car sounds like ****.

 

Tokyo's air quality is not that bad considering it's got a population of over 26 million people. It's too damn crowded and expensive to own a car. Everyone pretty much uses mass transportation.


I saw somewhere that Apex is coming out with a high flow cat. But I guess we'll have to wait until it comes out to see that quality of it.

 

Well well, I'm gutting my cat soon very very soon. The crazy noises my car is making now is just pissing me off.

 

take a picture of you chewing on the honey comb so we can put "owned for life" on your face

 

http://www.dynomax.com/super.stm

I've been using part number 15187 for two years without any problems.

 

hrrrm, we dont have emissions here anymore either, whats the best thing to do to the exhause without worrying about that

 

from the pictures i have seen in magazines there does not seem to be an o2 bung in the cat. and i think that it will be made for the jdm length cat-backs.

but that dynomax cat looks really nice, Baby NSX can you give any more info on the one you own??

1.price
2.OD
3.overall length

thanks


[Modified by Art Vandeleigh, 1:45 AM 1/30/2003]

 

Sure thing...

1: I paid ~200(CND) about two years ago.
2: It has a rectangular profile roughly 3" tall x 5" wide. Each tip has an I.D. of 2-1/2".
3: Length is 14" tip-tip. About 10" of that is cat.

 

 

BABY: thanks man!!! when (im not saying if cos i know it will happen) my carsound craps out, i will be looking at this cat!!! i think this could be the mesiah that everyone has been looking for in cats!!!! i hope.

edit: i see that it is only for OBDI apps...


[Modified by Art Vandeleigh, 1:48 AM 1/30/2003]

 

you can add a bung for obd-2 . you would need to have a 2.5" bung welded anyway to attach to a JDM Header. on a side note.. my Kuhmo's look like that too... no tread on the inside. gonna wait for the belts to expose then mount the new Azenas in the garage.

 

Would probably be the last thing you ever did as cats are seriously toxic!