Catalytic converters
I thought they might make a difference. I used to occasionally leave our cruise nights last just to watch the cars all leave.Problem was you ended up with stinging eyes and sinuses from all the idling from the fumes from all the cars.I'll bet a few well tuned engines burn reasonably clean but it's awfully difficult to clean up the idle on big power builds , or engines with long duration cams.
...wonder how much performance loss there would be with dual cats?
Good question. I have heard and read various power losses with cats added on. The whole thing with this is;
Does the car/computer/state demand a cat for operation?
Do you want to run a cat (or pair) to run and burn cleaner? That notation of burning eyes and noses at cruise night, to me, suggests those cars are not well tuned. I’ve stood behind some seriously lower and fast cars that did t do that to me or others. Granted, huge cams and the such can only get so good, but not burn my eyes out! That’s just stupid.
The LOL part is, try and talk to these fellas and all you get is a FU Buddy or Naaaa, I’m good! I know a guy changing his plugs out every 4/5 gas tanks full but doesn’t want to listen to me. “OK! Have fun changing plugs then!”
The only thing he says in his defense, because he really knows nothing! “According to my race track buddy it runs fine!”
I wonder what the efficiency of the cats would be without the added air that the smog pumps or pulse induction provides? Heck, some of the cats had an air nipple built into them to inject combustion supporting o2 into the case. Id say to provide that added o2, run a header evac system.
Believe it or not, I have actually looked this up before but I have not retained the information since it was just simply on the, interesting to know, the side of things. It is possible to look this up.