To De-Smog or not to De-Smog...

I have never found a "good" smog pump to take way 1 - 2mpg. It takes very little power to spin a smog pump, 1/8 - 1/4hp at very worst. Heck, I only loose only .5 - 1mpg with my A/C on.

74DartCustom, the smog pump is just a little vane air pump. It injects air into the exhaust system so the heat of the catalytic convertor has oxygen to burn the incomplete burned fuel. They aren't very pretty but not much of a power robber.

I would add that although your state may not require you to pass emission tests, emission equipment is a Federal thing and techically is still required to meet Federal emission laws of the year it was manufactured. With that being said there is a ton of us without our "mandated' equipment. I am one of them on my '65 Valiant (no PCV valve, I use header EVACs)


Chuck