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Name:	CAT BOAT -	Reply
Subject:	Weather/Performance
Date:	10/2/2007 6:04:47 PM

Many my know, but with the cooler air outside your marine engines will operate a little more effeciently. It's not much water in the lake to go out and test new props for better ski-pulling or speed, but if you get the chance it should be fun. Sometimes, it will surprise you just how much better your boat will perform.

Name:	roswellric -	Reply
Subject:	Weather/Performance
Date:	10/3/2007 8:41:03 AM

Come to think of it...I perform better in cooler weather....

Name:	LifeTime Laker -	Reply
Subject:	Weather/Performance
Date:	10/3/2007 12:21:12 PM

Me too

Name:	Fester -	Reply
Subject:	Weather/Performance
Date:	10/3/2007 2:31:12 PM

It's not just marine engines......I drag race alot and love the cool fall air.....the Baro goes up, the humidity goes down and gives you whats known as good air (density altitude measurement)....The density altitude change is what is improving the performance of your engine...my car will pick up, up to .4 tenths and 4 mph in the 1/4 in good air.....more power!!!!!!

"The SAE J1349 relative horsepower calculation shows how air density alters the power output of a properly tuned engine. For example, at 85 deg F, 30.14 in-Hg barometer reading, 58 deg F dewpoint and 5000 ft altitude, the engine only produces about 81.1% of the rated horsepower."

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