Re: L46 Choke Rod Help
An d where does the TIM&JG say that NA9 has AIR?
An d where does the TIM&JG say that NA9 has AIR?
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Terry -
Re: L46 Choke Rod Help
AIR is NOT associated with NA9. NA9 was 1970 only and consisted of a different carburetor (vent on primary bowl, and numbers listed in the TIM&JG) and carbon canister. NA9 also consisted of the aluminum plate under the carburetor and insulating washers for the carburetor mounting fasteners. I will say again, NA9 had nothing to do with and Air Injection Reactor. Is that clear? I don't know how to make it any clearer.
All California delivered 1970 Corvettes were supposed to have NA9, but it was available anywhere, and I have surveyed more than a few 1970 Corvettes that were delivered to locations other than California with some or all NA9 equipment installed. I have also surveyed some 1970 Corvettes that were originally delivered to California residents that did NOT have NA9 equipment installed.
Dennis your problem is in this statement:
"Wouldn't all California cars have the NA9 option, thereby also having AIR?"
You take it that NA9 = AIR. That is NOT true. End of story. Now you have to try to believe that statement, and accept it into your heart.
You are not satisfied that the TIM&JG makes NO connection between NA9 and AIR. You want personal service. Now you got it. The only thing further I can do is to ask you to put your handkerchief on your computer and pray for enlightenment. I can guarantee you, if you send a sizeable donation to Day Road in Cincinnati we will see that you reach the light that surpasses all understanding.
TerryComment
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Re: L46 Choke Rod Help
You have to bear with me I'm a little slow.Still looking for the"any key" on my keyboard
I get that AIR is a seperate system fron NA9. The AIM&JG states the AIR on all california cars. Also states the NA9 on all California cars. I don't know, kind of made me think California cars had them both, go figure. Thanks for clearing that up.
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Re: L46 Choke Rod Help
Dennis the second page you boxed refers to 1972 California Delivered base motor cars. NOT 1970. You can not extract a part of a sentence and make it say something out of context. At least you can not do that and be correct.
And yes the first statement you boxed states that ALL 1970 California delivered Corvettes had NA9. THAT was the California law, and is Chevrolet's story.
On the judging field if an owner shows up with a California delivered 1970 Corvette without NA9, it is the owner's responsibility to satisfy the judges that it was delivered without NA9. Of course the reality is the owner simply would not tell us the car was delivered new in California, and we would never know. Easy peasy, lemon squeezy
Now about that donation to the Day Road address, and be sure to keep your hanky on the computer. For more blessings we have a special offer just for you. The guys in Cincinnati will send you a personally blessed handkerchief if you agree to tithe us. I just love the possibilities here. I can't wait to go to work ont he new manual. I have some real money making ideas.
TerryComment
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Re: L46 Choke Rod Help
I have a fuzzy recollection from past research efforts on the NA9 option, that there were several differences between those carb setups and the base engine equivalent (different mounting bolts, different intake gasket assy, Etc.). My fuzzy recollection 'thinks' the NA9 choke rod was also different and unique compared to what the standard carb used...
Those with a '70 AIM book should be able to confirm/deny the choke rod PN difference angle by seeing what's called out for NA9 vs. what's listed for standard carb engines. Mayhaps, that's a part of the problem with the original posts' 'it doesn't fit' complaint...Comment
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Re: L46 Choke Rod Help
How did my question about a choke rod clip turn into an AIR debate; I'm not sure, but no problem
Something I have never understood is why GM was allowed to pump clean air into dirty exhaust making the tailpipe measurement sugar coated; how did they get away with this?
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Re: L46 Choke Rod Help
Actually, it's a well thought out concept that's used on present day cars. Today's cars use an electric pump that blows air into the exhaust to help the catalytic converter to light off quicker. The pump is controlled by the engine control management software. It's turned on and off when the ECM senses low coolant temperature or not enough catalyst function in the converter, based on the difference in voltage between the front and rear oxygen sensors. Early Corvettes don't use converters, but the concept is still valid. Blowing air into the exhaust port when the spent gasses are still very hot will cause an oxidation reaction (burning) that will break the hydrocarbons into H2O and CO2, thus helping to eliminate smog. They weren't as effective as today's emission controls, but, when they were operating correctly, they did help.
Another interesting fact is you didn't lose much horsepower with the early systems. It only took about 3HP to drive the pump, and you could always bump the timing up a few degrees more than factory specs to gain that back, so tearing them out to increase HP wasn't very effective.Comment
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Re: L46 Choke Rod Help
I thought they just took off AIR to make life miserable for people like you and me who try to put it back on 40 years later?Comment
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Re: L46 Choke Rod Help
Some initially think the A.I.R. system followed the old addage of 'dillution is the solution to pollution'... But, the comments above are dead nuts on...the injection of air into the exhaust stream allowed for further combustion of exhaust byproducts before they exited the tailpipe!Comment
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Re: L46 Choke Rod Help
I bent a choke rod out of coat hanger for my '70 L-46 and received no deduction when judged. NCRS on a budget. lol.Comment
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