Smog equipment confusion

Storfiskarn · January 11, 2007 at 3:13 PM

After reading a lot of threads on the forum trying to figure out the correct set up for my Mustang regarding smog equipment, I´m a bit confused mildly speaking.

My Kar is a 1966 San José made, scheduled build date Dec 6 1965 (06M) and DSO´d for Los Angeles (71). I understand that HiPo´s didn´t have the smog pump before 1967 and that the emission controll law was released on CA cars Jan 1 1966. But how about the oil cap on my HiPo that was built just before the emission law took effect? Is the correct set up a non-emission cap with a PCV valve attached to the carb. spacer, or should it be a closed ventilation system cap connected to the air cleaner? Or am I completely wrong about the whole thing?

I drive the car occasionally in Sweden where I live and don´t think the authorities give a fiddler´s fart about the kind of emission my Mustang came with. This is me wanting it to be top notch in every aspect possible. <img src=images/icon_smile_wink.gif border=0 align=middle>

Thanks, Tony

gjz30075 · January 11, 2007 at 3:24 PM

Interesting. I can say this: My 'A' code, San Jose 10/65 build with a DSO of 71 has the thermactor (sp?) heads but the air ports have been plugged and the rest of the smog stuff gone. I don't know if K's were any different. I'm anxious to hear others.

round2K_old · January 11, 2007 at 3:39 PM

In '65 & '66 cars first sold in California (regardless of who made them) were required to have a "closed" PCV system that would include the oil breather cap with the hose to the air cleaner, and manifold vacum at the carb base plate connected to a PCV valve. Both hoses made up the closed system. The suction side with the PCV valve removes blow-by gases with engine vacum, the valve cover to air cleaner hose removes them with air flow. California led the nation by 2 years when it came to emissions controls. The Federal governement did not follow suit with smog controls on cars sold in other states until '68.

The early hipos did not require AIR (Air Injector Reaction) or Thermactor pump systems because of the California Air Resources Board exemption for cars with special ignitions or induction systems for those years. Certain cars fell into this category including dual point ignitions, ram air, multiple carbs or fuel injection. In the case of the hipos the dual points were the exemption from smog pumps. As the air quality standards were tightened the number of loop holes closed and the number of bolt-on systems increased, which is evident when you open up the hood on anything after '68.

Edited by - round2K on 01/11/2007 16:00:24

J_Speegle_old · January 11, 2007 at 10:50 PM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>My Kar is a 1966 San José made, scheduled build date Dec 6 1965 (06M) and DSO´d for Los Angeles (71). I understand that HiPo´s didn´t have the smog pump before 1967 <hr height=1 noshade id=quote></BLOCKQUOTE id=quote>

Calif. started requiring a full Thermactor system on K codes (428's from the first of the production year) starting on April 15th if I remember correctly

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>and that the emission controll law was released on CA cars Jan 1 1966. <hr height=1 noshade id=quote></BLOCKQUOTE id=quote>

Emission controls started before that. Thermactor use started at the beginning of the production year on all Calif delivered non-Hipo cars

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote> But how about the oil cap on my HiPo that was built just before the emission law took effect? Is the correct set up a non-emission cap with a PCV valve attached to the carb. spacer, or should it be a closed ventilation system cap connected to the air cleaner? Or am I completely wrong about the whole thing? <hr height=1 noshade id=quote></BLOCKQUOTE id=quote>

Yes. A Calif delivered Hipo from 66 would have had the closed emission system which would include the breather with the hose attachement and the PCV valve and its attachement

Storfiskarn · January 12, 2007 at 3:20 AM

Thanks guys! I´m gonna try to locate a correct oil breather cap, hoses and PCV valve on Ebay.

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