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Old 11-05-2015, 07:39 PM   #11 (permalink)
EcoModding Apprentice
Join Date: Feb 2013
Location: Michigan
Posts: 126

Champagne - '13 Chevy Cruze 1LT
90 day: 33.35 mpg (US)
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Originally Posted by Cd View Post
Is the top blocked as well ? You might get better results if you block the top instead. One of the members here did some flow testing on a car much the same as yours. ( I think his is a Chevy Malibu.The grille design looks identical to your car. )
The testing showed some detached flow right at the hoodline.
Im a little paranoid about blocking off the top one. The lower one is directed mainly at the intercooler and initially worried me as this is a turbocharged car (want to avoid hitting a lean condition and creating hot spots on the piston heads - I hear this is an issue with turbo engines that run too hot). Either way since the intake is continuous with the turbo, the warmer temperatures from the cold side of the turbo not being cooled down have definitely helped my fuel economy as Michigan is cooling down right now. I used the intercooler block all last winter but, as soon as spring arrived with warmer temperatures I began to run into predetonation issues I removed the lower block and the symptom went away.

That being said, I'm afraid I'd be pushing my luck with completely blocking off the top for the radiator unless you're talking about the faux grill that rests right beneath the hood which serves no purpose whatsoever except for 'asthetics?' If that is the case I will definitely make one up this weekend and give it a shot.


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