We all know most real drag racers get there air from a dam near sealed fender. Go to a drag strip , You'll never see anyone suckin clean air threw a hood scoop, Ramin it into the engine, That's just crazy talk.

 

O.K. Batthing. Have you been hanging upside down too long? Your last two posts seemed to controdick[sp] each other. Can't have it both ways, so which is it....hole in hood or not?[or did I miss something..which would'nt be the first time I had a senior moment]. "Moon"

 

Batthing ? Nice.

 

Cowl induction hood in 5 easy steps:

Buy extra HHR hood (In case you screw up)

Buy steel stamped cowl induction scoop.( http://steelhoods.com/Shop_On-Line.htm )

Trim to size.

Weld to HHR hood.

Install and enjoy!

 

They don't seem to say anything about the hood door actuator pod. On the Chevelle SS models, it was operated off of the vacuum system. Not sure how much vacuum it required, but if you had an adjustable pod (maybe a threaded valve), you could regulate how much it opened based upon engine demand. You might be able to fabricate one out of a closed can with a steel tube silver soldered to it. Linkages for the door are a whole other story...

 

Well, now that's getting into some deep engineering.

I'd just make a blockoff plate for cold weather driving.

 

For example, I made this Chevy Van hood scoop by cutting 3 sides with a cutoff wheel, pulling up the sheetmetal, making a support from brakeline tubing, and filling the sides with sheetmetal.

About 6 hours total work, and I'm no bodyman.

 

The hood opening was opened by lack of vacuum, at idle a motor has the highest vacuum, & opening is shut.
Rev it up & door opens by reduced, to almost no vacuum..

It's just a reverse vacuum door..