Guys,

I am trying to pass a tailpipe emmissions test with my single. I bought an LT1 air pump, I have a catalytic converter... but should I add another converter in series to increase my chance of passing?

Testing here costs $700 a shot and I want to pass the first time.

 

A second Cat should help, as long as you can get it good and hot for the test.

I noticed on my failed test that NOx was very low while my Hydrocarbons were very high. Leaning out the fuel on my Power FC would have helped a ton, as Nox values climb with a lean burn while hydrocarbons drop.

Alcohol in your fuel is supposed to help as well.

You should be able to lean out your fuel a lot at the test RPM in the parking lot then take the test. Since you are not under heavy load the chances of detonating should be low.

 

A zero boost map will help as well.

 

I've seen this discussed before. (Where is GMonsen?)

The test we do here is only 2500 RPM under very little load. I didn't hit boost anyway.

 

$700 !!!!