What BB cars came without AIR injection systems?

1cool13L78 · #1 03-08-2010, 06:55 AM

What BB cars came without AIR injection systems? It seems there are a lot of exhaust manifolds without AIR out there. It is said the 1969 SS Chevelle 396/325 turbo 400 has been documented. Anyone know or have a list???

**Mr. Chevy** · #2 03-08-2010, 08:26 AM

1969 396/325 HP automatic trans.
1970 396/350 HP cars irregardless of trans type.

Not real sure on what occurred prior to 69, I think that was a high horsepower/4speed trans combo and/or west coast thing for smog... I know I have seen 66 Chevelles 396/325 HP 4 speed west coast cars with it..

Not too sure after 1970 what was a requirement... I'm guessing it was getting pretty standard by this point..

Rich

**Kurt S** · #3 03-08-2010, 10:09 AM

http://www.camaros.org/emissions.shtml#usage
(Chevelles and full-size cars with the 396/325hp engine and TH400 transmission were the only 68-69 Chevrolet big block cars that did not have smog pumps.)
Both those applications were high volume and worth the effort to certify.

I wonder if trucks could be the source of those non-AIR manifolds.

**bbbenny** · #4 03-08-2010, 02:41 PM

Guys, My 69 R/S SS Camaro,396-325 HP. Build date 03D. Has smog on it. And the car, is un touched. Just my two cents. BBBenny

**WILMASBOYL78** · #5 03-08-2010, 04:41 PM

[ QUOTE ]
1969 396/325 HP automatic trans.
1970 396/350 HP cars irregardless of trans type.

Not real sure on what occurred prior to 69, I think that was a high horsepower/4speed trans combo and/or west coast thing for smog... I know I have seen 66 Chevelles 396/325 HP 4 speed west coast cars with it..

Not too sure after 1970 what was a requirement... I'm guessing it was getting pretty standard by this point..

Rich

[/ QUOTE ]

The 1970 Chevy vehicles all received the new TCS (transmission controlled spark) feature...the low horse motors, regardless of tranny did not have smog (except for CA)...all high horse solid lifter engines (BB & SB) had the smog pump and plumbing. I'm pretty sure most of the 69 4 speed cars got the smog....and it sounds like the L-35's had it too, based on Benny's original car. I'm sure we will get more input on this...wilma

**RPOLS3** · #6 03-08-2010, 06:02 PM

My 72 LS3 was originally delivered in Chicago and has the K19 smog option from the factory.

**Mr. Chevy** · #7 03-08-2010, 06:06 PM

Tom, my understanding is that all standard shift cars in 69 got smog.. I have heard of 69 Mailbus with 6 cylinder sticks that had smog...

Strange that in 70 they implemented just the TCS and no smog plumbing with it on the low horse big blocks...

Rich

crash · #8 03-09-2010, 01:22 AM

My 1971 LS-5 4-speed Corvette doesn't have smog... Crash

Postsedan · #9 03-09-2010, 02:07 AM

[ QUOTE ]
My 72 LS3 was originally delivered in Chicago and has the K19 smog option from the factory.

[/ QUOTE ]

Jake,

Why are you missing a drivers side exhaust manifold bolt? I assume you are using the incorrect dipstick, until you can locate the correct one?

Dan.

**Bill Rose** · #10 03-09-2010, 02:13 AM

As stated above, all 68 big block Chevelles got smog tubes, except 325 automatics. Mine is a 4 speed with A.I.R.

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