Why or why not desmog?

[Pin_Head]

Pros:
You don't have to look at all that wiring and tubing.
You don't have to understand what it does and how it works.

Cons:
It takes a lot of time and work to remove.
No improvement in performance or fuel economy.
It may run worse under some circumstances, like popping in the exhaust manifold under engine braking.

 

[surfpig]

Emissions questions and some data that may help people...

I faced the de-smog dilemma several years ago. My mostly stock '82 has all the California smog crap. The advice I got here, from MUD people I know and trust, was to leave it alone as long as everything works.

I wish I could face that dilemma!



I had my piggie tested today and the CO and HC numbers were kind of high, but passing. I'm trying to sell this thing...

Well I know I've gotten better numbers, even from when I first bought it piston ring free and who knows how many cracked/missing vacuum hoses...

So I looked back at all my previous results, and if the timing is advanced one or two degrees toward TDC, those numbers improve dramatically.

I know my idle is running kind of rich, but that shouldn't matter much I don't think. And my manifold vacuum is at 19, not 16.5 per spec.

I don't know at what point they will fail a vehicle for the timing too far off, but it makes a big difference in the results. Even one degree.

It will drive like s***, of course.



I'm hoping this might help someone...