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What makes it a smog 140
Posted by: Chilly Willy ()
Date: April 19, 2017 03:50PM

Checking out a motor I just picked up. RT stamped, as far as The engine,is it just the cam and distributor that make it a smog? Heads are 570's
Thanks,Will



Will
Northern California

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Re: What makes it a smog 140
Posted by: Ed Dowds ()
Date: April 19, 2017 03:55PM

I believe smog engines had air pumps to dilute the exhaust.

Ed
Hillsborough, NJ
66 500 rear 4.3 V6 Corvair
69 350/350 TH Camaro was RS
30 Model A Ford Streetrod 350/400 TH
88 Celebrity Wagon (Daily Driver)

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Re: What makes it a smog 140
Posted by: Chilly Willy ()
Date: April 19, 2017 04:01PM

Ed Dowds Wrote:
-------------------------------------------------------
> I believe smog engines had air pumps to dilute
> the exhaust.


Thanks Ed
Also curious of inside...
Will



Will
Northern California

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Re: What makes it a smog 140
Posted by: 66vairman ()
Date: April 19, 2017 04:35PM

That is an odd bird - Calif. ONLY Corsa model smog engine in 1966 (no Corsa in 67). There is some debate about other states, cities requiring smog equipment in 1966 so it may have been in cars outside of Calif. Emissions controlled engines via Federal law came later and use a different code.

Best as I can recall the only variation for Calif. in 66 was the distributor, air pump and plumbing, and the carburetors. Bob Helt's book covers the carburetors.

Calif. A/C 140HP cars were exempt and had a different block code.

The heads on the emmisions controlled cars for 140HP engines always used the same combustion chambers as the 1965 140HP heads. In 1966 the head casting was revised to support the A/C bracket and some of the "tin" bolt holes were enlarged, also for the A/C bracket.

Calif. does not now require 66 vehicles to have the original SMOG equipment.

If the A.I.R pump is gone, the change the distributor to a 1966 140HP manual trans. 49 state version for better drive-ability.



Edited 2 time(s). Last edit at 04/19/2017 04:37PM by 66vairman.

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Re: What makes it a smog 140
Posted by: Chilly Willy ()
Date: April 19, 2017 04:42PM

That makes sense. Even though these aren't smog heads. I've read all us destinations have the same chamber. On smog heads,just bolt holes for the pump would be added.
Curious if there ever was a big valve open chamber head that would be a candidate for a turbo build.
Still learning after all these years 😉



Will
Northern California

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Re: What makes it a smog 140
Posted by: davemotohead ()
Date: April 19, 2017 04:50PM

A smog 140 is one that puffs out a lot of smoke! drinking smiley





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Re: What makes it a smog 140
Posted by: 66vairman ()
Date: April 19, 2017 05:03PM

Chilly Willy Wrote:
-------------------------------------------------------
> That makes sense. Even though these aren't smog
> heads. I've read all us destinations have the same
> chamber. On smog heads,just bolt holes for the
> pump would be added.
> Curious if there ever was a big valve open chamber
> head that would be a candidate for a turbo build.
> Still learning after all these years 😉

Used the same bolt holes that were used for the 140HP A/C.

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Re: What makes it a smog 140
Posted by: MattNall ()
Date: April 19, 2017 05:06PM

No pen chambered 140 heads.....although a few have been reported!!





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Re: What makes it a smog 140
Posted by: Chilly Willy ()
Date: April 19, 2017 05:15PM

davemotohead Wrote:
-------------------------------------------------------
> A smog 140 is one that puffs out a lot of smoke!
> drinking smiley

Funny you said that. It Crossed my mind as I was hitting the keys grinning smiley



Will
Northern California

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Re: What makes it a smog 140
Posted by: Vern in Bend ()
Date: April 19, 2017 05:47PM

per Bob Kirkman's comprehensive cyl head spreadsheet in the Tech Guide, 140 "smog" heads are the ones with stainless steel exhaust tubes.

They are otherwise identical to the "non-smog".

Regards, Vern

Bend, Oregon

'64 Corvan, daily driver - 42 years
'64 Rampside, personal driver - 24 years
'67 Monza Cpe, original owner - 33k miles
'80 Vanagon, converting to Corvair power, "VanaVair"
'81 Vanagon high-top panel van

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Re: What makes it a smog 140
Posted by: CoCoCo ()
Date: April 19, 2017 06:42PM

Not sure if this is due to them being smog heads, but mine had exhaust valve rotators as well.
Obviously not a combustion chamber difference, and easily swappable for whatever you prefer to use, but that's what my '66 CA Corsa came with.

Paul

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Re: What makes it a smog 140
Posted by: Seth Emerson ()
Date: April 19, 2017 06:55PM

66 Vairman writes:

"Calif. does not now require 66 vehicles to have the original SMOG equipment.

If the A.I.R pump is gone, the change the distributor to a 1966 140HP manual trans. 49 state version for better drive-ability."


Not really true about California. I do agree that, if the smog pump is gone, it is best to try to replicate the 1965 140 engine parts on a 1966 140 (California delivered). Sheet metal, distributor, etc.



California still specifies that all original smog equipment must be installed and operational. BUT - 1975 and older cars are exempt from both bi-annual testing or "transfer-of-ownership" testing. So, you won't be tested, but the equipment is still "required". Many California delivered cars mysteriously became out-of-state delivery cars, brought into California since then. After 50 years, who is going to say what has transpired.

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Re: What makes it a smog 140
Posted by: Vairismo ()
Date: April 19, 2017 06:57PM

If the engine has exhaust manifold(s) on it, check to see if they have a bolt and or a plug in the hole(s) on the back end for the air pump tubing to go into them.
If so, you may want to get standard 140 exhaust logs for it.

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Re: What makes it a smog 140
Posted by: BobV66Vair ()
Date: April 20, 2017 09:56AM

So the exhaust manifold were different on Smog engines? On V*'s there was air pumped nearly right onto the back of the exhaust valve. Caused a lot of damaged valve. Good to know that the Corvair was more sensibly done. The Smog engines were just stupid and ruined cars during the 70's. Most were mushy junk that met the DC idiots rules but didn't really do anything. Adding air to the exhaust made it appear they car was less polluting but it was all phony. I lived in CA during the 70's and was pleased to drive a 1965 Corsa with no nonsense stuff on it. Stupid politicians.

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: What makes it a smog 140
Posted by: glivorsi ()
Date: April 20, 2017 02:54PM

BobV66Vair Wrote:
-------------------------------------------------------
> So the exhaust manifold were different on Smog
> engines? On V*'s there was air pumped nearly right
> onto the back of the exhaust valve. Caused a lot
> of damaged valve. Good to know that the Corvair
> was more sensibly done. The Smog engines were just
> stupid and ruined cars during the 70's. Most were
> mushy junk that met the DC idiots rules but didn't
> really do anything. Adding air to the exhaust made
> it appear they car was less polluting but it was
> all phony. I lived in CA during the 70's and was
> pleased to drive a 1965 Corsa with no nonsense
> stuff on it. Stupid politicians.

The Corvair smog pump was probably less effective because of this. The idea of the smog pump is that incomplete and unburned exhaust components (CO, hydrocarbons) are still at their auto-ignition temperature as they leave the combustion chamber. Adding surplus air, and oxygen, at this point completed combustion of these gases. The key is that they must still be hot enough to react, hence the injection point right at the manifold. You can create surplus oxygen in the exhaust by running lean, however when you get too lean you get incomplete combustion and misfires which results in an increase in emissions.

Greg in Wildwood, MO (part of the St. Louis urban sprawl)

1965 Monza Vert 110PG, Crocus Yellow with black interior and top

2006 Mazdaspeed 6
1997 Honda CBR1100XX

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Re: What makes it a smog 140
Posted by: RexJohnson ()
Date: April 20, 2017 06:09PM

The Corvair smog exhaust manifolds have long tubes (like approx. 3") that let the air out right at the exhaust valve just like other engines.

RJ tools
Salem,Oregon

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Re: What makes it a smog 140
Posted by: ROD ()
Date: April 20, 2017 08:30PM

Vern in Bend Wrote:
-------------------------------------------------------
> per Bob Kirkman's comprehensive cyl head
> spreadsheet in the Tech Guide, 140 "smog" heads
> are the ones with stainless steel exhaust tubes.
>
> They are otherwise identical to the "non-smog".
>
> Regards, Vern


SS exhaust tubes on a set of 140 heads would be a nice find.

Rod Tetrault
El Cajon , CA
65 Corsa Yenko Clone / 65 Corsa EO Creampuff Vert
66 Corsa "JIMISH" Mid engine Turbo LS1 currently 2nd fastest Corvair in the USA
Class 5 Corvair powered Baja
61 Vintage Rampy
Corvair powered Buggy x 3
Enough hidden parts to build a space ship

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Re: What makes it a smog 140
Posted by: Chilly Willy ()
Date: April 20, 2017 08:55PM

Magnet test indicates stainless tubes. One log on it and it does have a port for air injection.



Will
Northern California

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Re: What makes it a smog 140
Posted by: 66vairman ()
Date: April 21, 2017 10:02AM

BobV66Vair Wrote:
-------------------------------------------------------
> So the exhaust manifold were different on Smog
> engines? On V*'s there was air pumped nearly right
> onto the back of the exhaust valve. Caused a lot
> of damaged valve. Good to know that the Corvair
> was more sensibly done. The Smog engines were just
> stupid and ruined cars during the 70's. Most were
> mushy junk that met the DC idiots rules but didn't
> really do anything. Adding air to the exhaust made
> it appear they car was less polluting but it was
> all phony. I lived in CA during the 70's and was
> pleased to drive a 1965 Corsa with no nonsense
> stuff on it. Stupid politicians.

Good grief I would hate to live in S. Calif. if air pollution had not been reduced. Granted it got off to a bad start. But now we have clean running cars with performance and mileage far superior to anything built in the 60's.

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Re: What makes it a smog 140
Posted by: MattNall ()
Date: April 21, 2017 10:20AM

Any your eyes don't burn every time you visit the LA basin!!





MODERATOR
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Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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