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Stewart Way · 01-05-2008, 12:46 PM

Ken
Better check your dictionary before class. One way Webster's defines altitude is "height above sea level", another being "regions at a greater height than sea level". As for vacuum what you refer to is a perfect vacuum. Again, according to Webster's, a vacuum is "air or gas at a pressure below that of the atmosphere" or "to clean with a vacuum cleaner".

In another post it was stated that there is no vacuum at WOT. The lowest pressure is in the cylinder on the intake stroke, but I don't think it is atmospheric pressure in the intake at WOT. This becomes a different discussion with a turbo or blower.
I have never put a vacuum guage on an intake and looked at it in the traps but my thought is that there is still a pressure differential across the carb or a vacuum in the intake, just less than at idle. If there was none, going to a bigger carb would not increase the airflow and make more power and it usually does.

Just my thought and I have been wrong before.

01-05-2008, 12:46 PM	#11
Stewart Way Member Join Date: Aug 2003 Location: Atlanta Posts: 476 Likes: 20 Liked 70 Times in 22 Posts	Re: Dommination of FI cars. Ken Better check your dictionary before class. One way Webster's defines altitude is "height above sea level", another being "regions at a greater height than sea level". As for vacuum what you refer to is a perfect vacuum. Again, according to Webster's, a vacuum is "air or gas at a pressure below that of the atmosphere" or "to clean with a vacuum cleaner". In another post it was stated that there is no vacuum at WOT. The lowest pressure is in the cylinder on the intake stroke, but I don't think it is atmospheric pressure in the intake at WOT. This becomes a different discussion with a turbo or blower. I have never put a vacuum guage on an intake and looked at it in the traps but my thought is that there is still a pressure differential across the carb or a vacuum in the intake, just less than at idle. If there was none, going to a bigger carb would not increase the airflow and make more power and it usually does. Just my thought and I have been wrong before.