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Cold air box ideas
G;day Crew;
Just wondering if anyone cares to share any designs or ideas/pictures of the way they are ducting cold air into their engine. Of particular interest to me is a 'pan' type set up and using the bonnet scoop to suck air into the engine. I have a new engine coming with a 4 barrel throttle body sitting on top and wish to seal the area when the bonnet is down, drawing cooler air from the scoop. I like the look of the summit oval air filters that also draw air from the top as well as the sides, but would also like to make a sheet of Aluminium as a shield to try and keep hot air from coming up from the engine and also use it as a base for some foam to go around the air filter and seal against the bonnet when its down. Opinions and ideas appreciated as to the effectiveness of such a set up. Cheers Chris L |
Big P p p p p pete Geoghegan's Mustang had a beautiful John Shepperd crafted aluminium shroud attached to the bonnet which kept the incoming cold air separated from the warm engine bay air.
I've seen some better photos but this is all I can find at the moment. I think it's enough to give you the idea. Legendary 1967 GTA mustang racer-News & Reviews-Unique Cars Jim Richards runs something similar on either the Falcon or the Javelin. http://blog.hemmings.com/index.php/tag/shannons/ |
Or from the bottom once aluminium pans are folded to direct air flow into Marty's bottom feeder custom air box filter.
Air filter box http://i564.photobucket.com/albums/s...rfilterbox.jpg And overall location http://i564.photobucket.com/albums/s...mpcatchcan.jpg Intake is at the bottom and the plan is to duct air in from under the radiator. Just an alternate thought. Cheers Slo |
Look at finish line accessories at their Turkey pans and then maybe a K&n filter as they breath through the top also.
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Hi Chris,
I think the biggest issue with the hood scoop is the pressure differential in thee engine bay. With the big radiator opening we are ramming lots of air into the engine bay. It's only escape path is the side vents and under the body. Given the shape of the front of the car there can be quite a bit of pressure under the car too with no splitter to divert the air to the sides. With all that in mind I reckon more air probably comes out of the scoop than goes into it. The only way to make the hood scoop work it to seal it to the underside of the bonnet. A turkey pan with a foam rubber lip seal to seal it to the inside of the bonnet would probably work. An alternative would be to run an air cleaner with a couple of snorkels on it and run flexible hoses from the snorkels and pick up cold air from the high pressure zone in front of the radiator. This is the kind of air cleaner I'm referring to http://i428.photobucket.com/albums/q...z/IMG_0337.jpg Cheers |
Hi Chris,
I used to have loads of under bonnet pressure before I fitted alloy flashings around the radiator. At speed the bonnet would lift half way up the windscreen if the catches weren't properly locked, now it doesn't lift at all with the latches undone. So... One could assume that without the flashings in place the air would be going out the scoop. So I'd get that done first and your radiator will work better too. Gav |
Thanks Gentleman thus far for the input. Although it could well be the best option, I really don't want to lift the bonnet and have ducting plumbed from top to bottom picking up the fresh air.
If I can't seal against the bonnet when its closed and locked properly then I will probably will duct and pick up air from underneath as has been suggested. Mike and Gav.......you both answered questions I was suspicious about so thanks for that and thanks to the fellas that posted the pics..............nothing like a visual to get the message and ideas across. Regards Chris L |
2 Attachment(s)
Hi Chris,
Gardner Douglas (gdcars.com) in the UK make an airbox that is contoured to fit in the nose in front of the radiator, so that cold air is sucked in through the foam filter covering the whole of the underside of the airbox. I bought one from GD and modified it a little to fit in the nose my Dax 427. Couple of pictures attached. The first is of the airbox as fitted on a GD, and the second is of the one that I bought for my car. Works well. Regards, Mike. |
Mine has the air from the two front brake ducts,then ducted/directed into a custom made air box,with a large vertical filter,and then on to the engine.
A bit of mucking about,but it certainly works nicely Cheers Warren http://www.clubcobra.com/photopost/d.../IMG_20931.jpg http://www.clubcobra.com/photopost/d.../IMG_20942.jpg http://www.clubcobra.com/photopost/d...0/IMG_2397.jpg http://www.clubcobra.com/photopost/d...0/IMG_3893.jpg |
Just grab some cardboard and pvc pipe then make a mock up intake. Easy for a fabricator to reproduce in alloy if you keep it simple.
Might take a few goes to get right, but worth the effort. Cheers, Ben http://www.clubcobra.com/photopost/d...004_Small_.jpg http://www.clubcobra.com/photopost/d...116_Small_.JPG |
that looks very neat
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