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Jul 21st, 2025 | | | | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | Went on a 250 mile cruise/car show today with temps in low 90's. Running a 350/290hp chevy motor with Griffin rad with Spal fan. Heat from fan seems to be hitting my fire wall and after a while, heat seems to just boil from under dash, yeah it's insulated but not with the real good stuff. It's working my A/C hard as thats where it gets the air to cool me. Over dinner a buddy suggested an "air dam" to suck the hot air out under the car. Will this idea work? Thanks
Six volt guy living in a twelve volt world
| | | | | Joined: Jun 2010 Posts: 188 Shop Shark | | Shop Shark Joined: Jun 2010 Posts: 188 | An air dam under the rad creates a low pressure area behind the dam. Results in more air flow thru the rad and back and out below the cab. A plus is better cooling too.
I used one from a 75 nova on my bigblock chevelle but you could build one easily.
Last edited by gotgasd; 07/05/2011 5:26 AM.
| | | | | Joined: Dec 2008 Posts: 319 Shop Shark | | Shop Shark Joined: Dec 2008 Posts: 319 | Agreed...you don't need a front like a European sports car, but a little "lip" under the radiator will definitely help. The bigger it is, the more it will do, though. If it's made of some thick rubber sheet, it won't get damaged by curbs or dead animals!
cm
If you can't fix it with a hammer and screwdriver, you need a bigger hammer.1965 Chevy C10 | | | | | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | Ok, I've found a dam to mount, although Home Depot calls it a concrete mixing pan. Cut the long side out of it and with a little triming it fits great. The top lip will hook over the vette sway bar and the bottom of the pan curves. The question is...which way should the bottom curve point, toward the front or back? Should I trim the bottom curve off completely? Total height is about six inches. Thanks
Six volt guy living in a twelve volt world
| | | | | Joined: Jun 2010 Posts: 188 Shop Shark | | Shop Shark Joined: Jun 2010 Posts: 188 | Curve to the back i would think. Otherwise the lip might catch a bit too much air and bend.
You'll be experimenting with optimum height. IIRC the nova one I used was about 4" high.
And kudos to you for doing a little hotrodding and using something it wasn't originally designed for. Don't tell HH. They'll try to market it as an air dam. LOL!!! | | | | | Joined: Dec 2005 Posts: 1,026 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 1,026 | Just be sure to post pic's of the finished product. Sounds like a mod I'd also like to try.
Robert C. If it's true what they say, "You learn from your mistakes," I'm a Genius in the making. 1950 3600 | | |
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