The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Cold Air intake on 67-72??

ZOOMY · 03-19-2004, 10:44 PM

The increase in HP at 200 mph from ram air is about 5%. At 60 mph it's probably around 1%. The difference in Hp between the engine sucking hot air from under the hood & sucking cooler air is substantial. It depends how cool the outside air is, but the gain would be more than 10%. Cooler air is denser thereby producing more power.

03-19-2004, 10:44 PM	#18
ZOOMY Senior Member Join Date: Feb 2003 Location: WIS Posts: 1,752	cool air The increase in HP at 200 mph from ram air is about 5%. At 60 mph it's probably around 1%. The difference in Hp between the engine sucking hot air from under the hood & sucking cooler air is substantial. It depends how cool the outside air is, but the gain would be more than 10%. Cooler air is denser thereby producing more power.