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Old 04-28-2010, 02:49 AM
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Thermostatic Air Cleaner

Apparently, the state of Texas no longer appreciates the fact that I have an open-element air cleaner on my '71 El Camino anymore. I would chalk this up to the fact I live in the Dallas area where they do smog tests. But, it's actually a DPS requirement for any car built after 1968, statewide.

So, being a law abiding citizen I bought an L82 dual snorkel air cleaner. And Dynomax makes a heat riser kit for header equipped cars. So now everyone is happy.

My question is twofold.

Has anyone ever flow tested these air cleaners? I've heard the L69 air cleaner will flow up to 900 cfm, and it doesn't appear to be very much different than the L82 air cleaner. If I can find a place to run the ducts to the front of the car to get some ram-air effect, I may be better off performance-wise than I was with the open element air cleaner sucking in all that hot engine bay air.

2nd, where do I find repair parts if those vacuum valves stop working? Does anyone even make them anymore?

GM performance parts used to sell the L69 air cleaner and ducting on its own, and used to sell a kit that included it so you could put a H.O. 350 in an early '80s Camaro that would pass emissions and run in the 13's.

But neither is available anymore. My online searches for parts at GM, NAPA, etc., haven't come up with anything either.

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Old 05-02-2010, 07:12 AM
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Thanks for all the help. But I think I've got it.

I was using the wrong search terms. "Thermostatic Air Cleaner" will net you nothing. You've got to learn the correct terms for the component parts as defined by whomever decides such things. What I called a "vacuum valve" is actually called a "vacuum motor."

A rookie mistake.

Again, thanks for the assist.
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