AIR pump or No AIR Pump?
Burning Brakes
Joined: Jul 2000
Posts: 1,162
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From: Beaverton, OR
Re: AIR pump or No AIR Pump? (hunt4cleanair)
"In 1970, Congress passed the Clean Air Act that would layout emission requirements throughout the C3 generation. This was also the first year equipment was in place to test emissions and therefore tests began to check for hydrocarbon (HC), carbon monoxide (CO) and nitrous oxide (NO2) emissions.
Burning Brakes
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From: Beaverton, OR
Re: AIR pump or No AIR Pump? (hunt4cleanair)
Thanks dath for pointing that out...rather significant.
Le Mans Master
Joined: Sep 2002
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From: Myrtle Beach SC
Re: AIR pump or No AIR Pump? (Jim Shea)
BTW, my AU emissions label has the following information:
AIR-EGR-EFE-OC; the sticker has a table for automatics as well as manual transmissions (so it is the same sticker for both); it also says 350 cu in, high performance 4 bbl, GM10K43A.
AIR-EGR-EFE-OC; the sticker has a table for automatics as well as manual transmissions (so it is the same sticker for both); it also says 350 cu in, high performance 4 bbl, GM10K43A.
Great insights and consistent with what I've learned. One thing I have yet to figure out is the OC in the emission lablel...what does it indicate?
Le Mans Master
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From: Myrtle Beach SC
Re: AIR pump or No AIR Pump? (Tom73)
In 77, the L-82 had an AIR Pump, the L-48 did not. My L-48 does.
What does your emission sticker say?
What does your emission sticker say?
[Modified by hunt4cleanair, 6:46 PM 7/29/2003]
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From: NM
Re: AIR pump or No AIR Pump? (hunt4cleanair)
Emissions are not that simple...L-48, non California or high altitude and equipped with automatic transmission were equipped with CCS rather than A.I.R.
tom...
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From: Myrtle Beach SC
Re: AIR pump or No AIR Pump? (Tom73)
the reference was 77 and so 77-80 manual trannys used A.I.R. It was those L-48 autos that were equipped with CCS...and that were non-CA or high altitude.
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From: Roanoke VA
Re: AIR pump or No AIR Pump? (Tom73)
Here is a listing that I compiled from various BBS discussions that may help somewhat.
1966 CA-delivered Corvettes, except for the L-72, used the A.I.R. (RPO K-19) system
1967 CA-delivered Corvettes, used the A.I.R. (RPO K-19) system.
1968 & 1969, ALL Corvettes used the A.I.R. system regardless of engine, transmission, or where delivered.
1970, Chevrolet went to the CCS (Controlled Combustion System) for emissions control on most Corvettes, except the LT-1s which used A.I.R.
1971, Corvettes continued to use CCS (except LT-1s and LS-6s which used A.I.R.).
1972, A.I.R. system returned for most Corvettes except engines except L48s with the "CKW" and "CKX" code.
1973 - 1975, all Corvettes used A.I.R, except for the 1974 L48 with automatic and Federal emissions which used CCS.
1976, all Corvettes returned to CCS, except California-certified cars which used A.I.R.
1977, all Corvettes used CCS, except California and "High Altitude" delivered cars which used A.I.R.
(Not sure on the '76 and '77 Vettes as I thought all L82's used A.I.R.)
1978 & 1979 all Corvettes used CCS, except California cars, "high altitude" and all L-82s which used A.I.R. L-82s were not available in California or "high altitude" areas during these years.
1980 - 1987, all Corvettes used A.I.R.
1988 - on, A.I.R. was used on most, if not all Corvettes, although many C4s use an electric air pump.
tom...
[Modified by Tom73, 7:33 AM 7/28/2003]
1966 CA-delivered Corvettes, except for the L-72, used the A.I.R. (RPO K-19) system
1967 CA-delivered Corvettes, used the A.I.R. (RPO K-19) system.
1968 & 1969, ALL Corvettes used the A.I.R. system regardless of engine, transmission, or where delivered.
1970, Chevrolet went to the CCS (Controlled Combustion System) for emissions control on most Corvettes, except the LT-1s which used A.I.R.
1971, Corvettes continued to use CCS (except LT-1s and LS-6s which used A.I.R.).
1972, A.I.R. system returned for most Corvettes except engines except L48s with the "CKW" and "CKX" code.
1973 - 1975, all Corvettes used A.I.R, except for the 1974 L48 with automatic and Federal emissions which used CCS.
1976, all Corvettes returned to CCS, except California-certified cars which used A.I.R.
1977, all Corvettes used CCS, except California and "High Altitude" delivered cars which used A.I.R.
(Not sure on the '76 and '77 Vettes as I thought all L82's used A.I.R.)
1978 & 1979 all Corvettes used CCS, except California cars, "high altitude" and all L-82s which used A.I.R. L-82s were not available in California or "high altitude" areas during these years.
1980 - 1987, all Corvettes used A.I.R.
1988 - on, A.I.R. was used on most, if not all Corvettes, although many C4s use an electric air pump.
tom...
[Modified by Tom73, 7:33 AM 7/28/2003]
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Re: AIR pump or No AIR Pump? (hunt4cleanair)
One thing I have yet to figure out is the OC in the emission lablel...what does it indicate?
Race Director
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From: NM
Re: AIR pump or No AIR Pump? (Crickett)
What is CCS??
tom...
Thread Starter
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From: Sun Valley CA
Re: AIR pump or No AIR Pump? (blackbirdpilot)
More investigation on the AIR issue:
was/are the AIR pumps driven off of the crank pulley or the water pump?
Looks to me like the water pump pulley has been replaced. It is a two grove pulley, but dose not appear to be deep grove. I am, of course working on the assumption, that it is supposed to have deep grove pulleys, and that the AIR pump was driven by by the water pump pulley.
Also, I can now read the emmisions sticker. CF I beleive. No mention of Air Injection Reacttion. Dont konw if this means anything though.
Gonna drop the tank in a week or so to clean it out and see if the broadcast sheet is still there.
Thanks for all the info so far! So much info!!
Marco :thumbs:
was/are the AIR pumps driven off of the crank pulley or the water pump?
Looks to me like the water pump pulley has been replaced. It is a two grove pulley, but dose not appear to be deep grove. I am, of course working on the assumption, that it is supposed to have deep grove pulleys, and that the AIR pump was driven by by the water pump pulley.
Also, I can now read the emmisions sticker. CF I beleive. No mention of Air Injection Reacttion. Dont konw if this means anything though.
Gonna drop the tank in a week or so to clean it out and see if the broadcast sheet is still there.
Thanks for all the info so far! So much info!!
Marco :thumbs:
Le Mans Master
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From: Myrtle Beach SC
Re: AIR pump or No AIR Pump? (blackbirdpilot)
Also, I can now read the emmisions sticker. CF I beleive. No mention of Air Injection Reacttion. Dont konw if this means anything though.
CF indicates a 350/300...engine suffix should read HY or HZ. GM did not begin to indicate emission technologies installed on the vehicle until 1971 so in 69 in what not indicated.
Le Mans Master
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From: Myrtle Beach SC
Re: AIR pump or No AIR Pump? (Paul Borowski)
Paul:
Going back through my Hershey notes and photos...I saw two 75 L48 automatic cars both of which had the AS emissions label indicating A.I.R. No WJ tags!
Where did they get that for the 75 manual? Must have made it up.
Going back through my Hershey notes and photos...I saw two 75 L48 automatic cars both of which had the AS emissions label indicating A.I.R. No WJ tags!
Where did they get that for the 75 manual? Must have made it up.
Pro
Joined: Sep 2002
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From: Epping NH
Re: AIR pump or No AIR Pump? (blackbirdpilot)
Assuming that your 69 350 is set up like mine, your AIR pump would run off a 3rd pulley (a seperate plate). Off the top of my head, I think it runs off the water pump, but I need to look to be sure.
Mark
Mark
