Would a cat even work on a car with a cam like a 306 or would it just get clogged up or not work very well?

Wondering if there's a way to tone down the smell on a cc306 camm'd car.

 

Why wouldn't it work? A cat con converts combustion gases into water and CO2...or it would if it was 100% effecient. Since they aren't you get all sorts of things through as you could determine with an emissions test.

A convertor can be ruined by a couple of things. Raw fuel, as in a supremely over rich condition, can cause them to run very very hot and fuse the matrix together, essentially blocking it. If you have a well tuned car, it won't be running rich enough to ruin the convertor. BTW, that's one reason the rev limiter on our cars cut fuel instead of spark...cutting spark yields a rich condition.

Other ways to ruin a cat con would be a bad head gasket allowing coolant into the exhaust or severe oil burning, again things you won't have on your car.

You'll be fine running cats on your CC306 equipped car. It will, however, reduce exhaust flow...even the highest flow cats will do this..and result in lower power output. Even on my GM846 cammed car the difference is measurable...about 10 hp...but I installed cats anyway.

 

Thanks for the info! I was thinking the 306 cam does allow a little raw fuel into the exhaust b/c of it's overlap...is this not true? The exhaust stinks, but most cars exhaust stinks without a cat.

I don't care about losing hp...I will just be glad to quiten the thing down some, and reduce the smells! Do you recommend any certain brand cats? I seem to remember Random Technologies were good back years ago, but I haven't researched it in forever.

Thanks!

 

ttt?

 

Proper tuning will get the engine running with the proper mixture and you won't get raw fuel into the exhaust....

You can go with Random technologies cats or those by mangaflow..either work just fine. I used a highflow cat that I bought from Magnaflow and it works fine and certainly cleaned up that odor and moderated the exhaust volume....

 

Excellent! So now my next question is....should I get one cat installed at the end of the y-pipe (running longtubes/y-pipe), or should I order 2 and put one on the end of each header collector?

 

I,ve had good results w/ the Walker Dyna Max hi flow cat on my 94& ran just one cat.Your application might depend on the yr. of car.

 

My car stinks without the cats. No prob with the cats.

 

Cats won't fit very well bolted right up to the headers. You can buy a Y-pipe with them installed from Mufflex in New Jersey....they may or may not be supporting vendors, I didn't look.

I simply put a single high flow cat on the end of the y-pipe and fabricated an intermediate pipe to my Corsa exhaust. It works just fine and makes enough power for me...at least until I lose the next race, chuckle.

Good luck!