Sooo when you installed your cats, two questions:Cats work on a lot more than just heat burning off excess hydrocarbons. They're catalytic converters, meaning they change the chemistry of the gases based on exposure to a catalyst. They oxidize CO into CO2, they oxidize hydrocarbons into CO2 and H2O, and they reduce NOx's into N2.
The air injection inserts oxygen to maximize the oxidation stages of the catalyst, and in some cases, to offset an overall rich mixture. It's there for a reason.
But...do you NEED it? Other than from an equipment-mandate standpoint, I land on "no", because most cats in most circumstances will run a long, healthy and test-passing life without it.
1. Did it reduce the smell?
2. How long ago was it exactly and are they still kicking.
Furthermore,
The reason I brought this up, is currently if you go out and buy a catted pipe for our cars (BBK, LMR, or etc) the provision is still there.
Our fleet of cars are in multiple different configurations by now, bumped timing, different HCIs, power adder....soo the answer is not one for all.
However, for discussion purpose lets say HCI bumped timing, gears, no power adder.
I’m thinking getting the magnetically spun cats and just plumbing the air pump straight to the cats due to my current situation.