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The Science Of Cooling A Hybrid


Scottie-GNZ

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Twoeightnine Quote:

 

"Chevy engineer Doug Roe, who worked with Product Promotions chief Vince Piggins, found a dramatic performance gain by taking the cool dense air at the high pressure area near the base of the windshield. Ducting pressurized fresh cold air from this area to the carburetor creates a more dense fuel charge with increased volumetric efficiency resulting in more horsepower."

 

I know.....Im being picky.

 

Just to clearify that when they "duct pressurized cold air" to the carb, they are SEALING the carb to the hood scoop opening wth some kind of sealing box. The scoop is NOT open to the engine compartment, just the carb box.

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I remember seeing a history lessor of sorts dealing with aerodynamic's before the modern windtunnel, they wouod put little dags of grease in a grid on the car, when they drove the car the grease would move and make a track across an area clearly showing where the wind was pushing it, might not be rocket science but it's an easy to get a definitive answer as to where the air is going and how you can better utilize it to cool the car

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Ok, so with the low pressure under the hood, the high pressure from the base of the windshield is preventing the hot air from escaping at speed. When the car is idling, you can feel the rush of hot air escaping, which I why I put the scoop in that configuration. If the scoop was blocked off and had the slots on the side, my conclusion is that it should give the same effect at idle and low speed without the high speed effect.

 

Now for my final question. The car originally came with an engine belly pan and my assumption is that it helped create low pressure in the engine compartment. If I block the scoop and put the slots on the side (like the Z option hood in the pic), will the belly pan help or worsen the problem?

 

_MG_5202.jpg

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Now for my final question. The car originally came with an engine belly pan and my assumption is that it helped create low pressure in the engine compartment. If I block the scoop and put the slots on the side (like the Z option hood in the pic), will the belly pan help or worsen the problem?

 

It will help. Belly pans are not cosmetic items added as an afterthought by the manufacturer. They help draw air through the radiator and then keep it moving back over the hotter parts of the engine to help cool things.

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  • 2 weeks later...
UPDATE!!

 

I had the sides of the scoop cut just like the Nissan scoop and temporarily blocked the rear exit and the problem of the temp rising on the highway is now solved.

 

Thanks to everyone who contributed to this discussion.

 

pics.. pics!

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