Air intake behind the bumper - Chevelle Tech
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post #1 of 5 (permalink) Old Jul 2nd, 19, 8:26 PM Thread Starter
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Dennis
 
Join Date: Sep 2000
Location: Walnut Creek, CA
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Air intake behind the bumper

I currently have my air filter behind the headlights on the drivers side. The filter is currently open to the engine compartment. I知 going to enclose the filter and want to connect it to cooler air from outside the engine compartment.
I知 considering cutting a hole in the inside front fender, the horizontal part forward of the drivers front tire and behind the headlight. This would allow air in from below the car, in front of the front tire but behind the front bumper.
My question is this a high pressure or low pressure area? I could put an elbow below the inside fender to angle the intake forward or sideways or?
Any opinions as to the quality/quantity of air in this area?

66 Chevelle hardtop - LFX 3.6 liter V6/6L50 6 speed auto trans, 3.07 10 bolt, full Hotchkis suspension, Wilwood 4 wheel discs, white with red interior, cowl hood.
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post #2 of 5 (permalink) Old Jul 2nd, 19, 10:16 PM
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Jason
 
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Location: Abilene ,Texas
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I have mine routed like this but on the passenger side. Filter is tucked behind the bumper. (No water driving) It helped for sure. The computer was pulling timing because of the hot engine compartment. On the Controller the IAT went from 170 down to outdoor ambient while running. I looked before doing this about the high/low pressure area could find any solid info.
The cooler air alone is worth it.
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post #3 of 5 (permalink) Old Jul 2nd, 19, 10:32 PM
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Claude
 
Join Date: Jul 2011
Location: Saint-Eustache, QC Canada
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Re: Air intake behind the bumper

Quote:
Originally Posted by 67_LS1 View Post
I currently have my air filter behind the headlights on the drivers side. The filter is currently open to the engine compartment. I知 going to enclose the filter and want to connect it to cooler air from outside the engine compartment.
I知 considering cutting a hole in the inside front fender, the horizontal part forward of the drivers front tire and behind the headlight. This would allow air in from below the car, in front of the front tire but behind the front bumper.
My question is this a high pressure or low pressure area? I could put an elbow below the inside fender to angle the intake forward or sideways or?
Any opinions as to the quality/quantity of air in this area?
You'll be getting cooler, more dense air than behind the headlights. I have the exact same setup on my Buick Grand National and the filter is at the end of the ram air tube like you said "forward of the front tire but behind the front bumper". There's no need to put an elbow, just mount the filter vertically and you should be fine. I'm including two pictures of the setup on my GN so you can visualize better what I mean. Hope this helps!
Claude.
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1971 Chevelle SS
1987 Buick Grand National 9.48 @ 142 mph
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post #4 of 5 (permalink) Old Jul 3rd, 19, 1:39 AM Thread Starter
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Dennis
 
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Location: Walnut Creek, CA
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Re: Air intake behind the bumper

Quote:
Originally Posted by toofastforyou View Post
You'll be getting cooler, more dense air than behind the headlights. I have the exact same setup on my Buick Grand National and the filter is at the end of the ram air tube like you said "forward of the front tire but behind the front bumper". There's no need to put an elbow, just mount the filter vertically and you should be fine. I'm including two pictures of the setup on my GN so you can visualize better what I mean. Hope this helps!
Claude.
My filter will be in a box above the inner fender. Behind the headlights. I知 going to cut a 5 hole in the inner fender to allow air to be drawn up from above hence the mention of an elbow.
Does your filter get wet down there?

66 Chevelle hardtop - LFX 3.6 liter V6/6L50 6 speed auto trans, 3.07 10 bolt, full Hotchkis suspension, Wilwood 4 wheel discs, white with red interior, cowl hood.
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post #5 of 5 (permalink) Old Jul 3rd, 19, 7:13 AM
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Claude
 
Join Date: Jul 2011
Location: Saint-Eustache, QC Canada
Posts: 3,186
Re: Air intake behind the bumper

Dennis, the reason why my filter isn't in a box is because I go drag racing with my car and the car runs better without a box than when enclosed. These turbo cars need a lot of air and the box doesn't allow enough volume of air to get in fast enough! As for the filter getting wet, I don't think it does but I don't drive that car in the rain.

Claude.

1971 Chevelle SS
1987 Buick Grand National 9.48 @ 142 mph
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