AC44 or AC45
Thread Starter
Safety Car
Joined: Aug 2011
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AC44 or AC45
I know the AC45 is a hotter plug but does that mean the engine will run hotter, over heat. According to manual the 44 is original equipment, but the way I drive my car, short trips around town, I'm wondering if the 45 is what I need. But then again, I do not want the engine to overheat.
Le Mans Master
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From: The problem is all inside your head she said to me.
Someone can correct me if I'm wrong but I don't believe one step or many would make the engine run hot. It has to do more with the life of the plugs and weather they are fouling or not. The insulator is different in a hot to cold plug to keep the tip hotter or cooler to fire the mixture, not heat or cool the engine.
Gordon.
Gordon.
Le Mans Master
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From: columbus oh
I know the AC45 is a hotter plug but does that mean the engine will run hotter, over heat. According to manual the 44 is original equipment, but the way I drive my car, short trips around town, I'm wondering if the 45 is what I need. But then again, I do not want the engine to overheat.
a lot of c/f users use the 45 range
hope this helps.....
Team Owner
Joined: Mar 2003
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From: Greenville, Indiana
The spark plugs in your engine need to run at least 850*F to keep the plug from fouling.
Hotter plugs will raise the temperature of the PLUG tip, not the engine. Colder plugs will LOWER the temperature of the PLUG tip.
Doesn't have anything to do with engine operating temperature.
Hotter plugs will raise the temperature of the PLUG tip, not the engine. Colder plugs will LOWER the temperature of the PLUG tip.
Doesn't have anything to do with engine operating temperature.
Team Owner
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Army
These cars generally run rich ESPECIALLY the dual quads...run AT A MINIMUM AC45. At one point GM released a service bulletin to go even one range higher (AC46) for anti-fouling. You will not find AC46s but, if you need them, there may be equivalents out there.
Drifting
Joined: Jul 2009
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From: Tampa, FL & Harleysville, PA
The spark plugs in your engine need to run at least 850*F to keep the plug from fouling.
Hotter plugs will raise the temperature of the PLUG tip, not the engine. Colder plugs will LOWER the temperature of the PLUG tip.
Doesn't have anything to do with engine operating temperature.
Hotter plugs will raise the temperature of the PLUG tip, not the engine. Colder plugs will LOWER the temperature of the PLUG tip.
Doesn't have anything to do with engine operating temperature.
rustylugnuts
Last edited by rustylugnuts; Sep 9, 2011 at 02:01 PM. Reason: changed to 45 to 46
Drifting
Joined: Jul 2009
Posts: 1,610
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From: Tampa, FL & Harleysville, PA
rustylugnuts
Last edited by rustylugnuts; Sep 9, 2011 at 01:18 PM.
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From: Greenville, Indiana
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From: Washington Michigan
Team Owner
Joined: Mar 2003
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From: Greenville, Indiana
If the Florida DOT does a fuel check on him, do you think they'll put the hook on him and impound the car for illegal fuel?
Drifting
Joined: Jul 2009
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From: Tampa, FL & Harleysville, PA
..... OK....... I'll provide you with my address, but tell them not to show up before noon I'll be out golfing....rustylugnuts
Le Mans Master
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From: Ocala FL
No, on an old car, pre 1968, there are no fuel requirements from emission laws.
However, the taxman might get him. Running av-gas, he isn't paying all the state and federal taxes and is therefore illegal.
Then again, there are so many laws most of us break without ever knowing it, I doubt anyone has to worry about people checking our gas.
Although about 20 years ago, Ohio was pulling race car trailers over to check if they were carrying fuel. You were only allowed something like 5 or 10 gallons and a lot of guys going to the SCCA Run Offs were carrying far more than that for their week long racing championships.
