Chunky2772 has passed

[baz-r]

Originally Posted by chunky2772

Ive put two cats in the exhaust system now and its not made any difference.
I dont want buy a power commander and have the hastle of the rolling road. The engine in the car is nearly brand new its only got 1,500 miles on it and thats also more cash i need to through into it.

what you running engine and fueling wise i would be surprised if you could not get a bike engine thu a cat test you would need to have some form of fuel inj running closed loop lambda (narrow band would be ok)
megasquirt/microsquirt springs to mind
if you have say a newer bike engine it would have inj and a sensor in the exaust it should get through ok

thing is with cats is you have to get the fueling fairly lean to get good gasses out
you would need your pre cat co less than 0.50 to have any chance of the cat dooing its work and have it close enough to the engine to get hot enough to work its magic
this will be almost impossible with a carb setup in my opinon
as you not only have to idle but fast idle bit of the test too

[ozzy1]

I had the cat just past the primaries and had the mixture leaned a bit to pass the emissions,this was all done on a gas analyser with a zx9 motor on carbs and passed easily.Just takes a little know how on behalf of the person setting it up for you.