Re: 70 Challenger hood scoops - anyone improve the aero?
[Re: JF_Moparts]
#2620343
02/12/19 05:27 PM
02/12/19 05:27 PM
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Joined: Jan 2003
Posts: 5,138 East Aurora (Buffalo) NY
RoadRunner
master
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master
Joined: Jan 2003
Posts: 5,138
East Aurora (Buffalo) NY
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I'll take a stab. First, the standard hood on a Challenger has the two simulated air intakes much to close to the surface of the hood to be of any use for air intake. Teh main source of air would be at the front of the grill the recessed grill, though sexy as hell on the Challenger, isn't the most aerodynamic. There is a large build up of pressure at speeds. Some of this is good for cooling as the higher pressure will push air through the radiator.
With that said, it is doubtful that is the source of the issue. I am guessing that that you are missing or have ill adjusted hood bumpers. There are multiple fixed rubber bumpers at the rear of the hood. If the hinges are adjusted properly, the rear of the hood should rest on them. There are side bumpers that have spring loaded tapered rests that should keep hood from moving side to side and support the center. At the front are two adjustable bumpers that can be raised and lowered to adjust the height of the hood at the front. The latch should be adjusted to pull the hood slightly against the rubber stops on these adjusters while the height of the adjusters keeps hood aligned with fenders.
I'd check these adjusters and bumpers first.
68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1
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Re: 70 Challenger hood scoops - anyone improve the aero?
[Re: RoadRunner]
#2621149
02/14/19 04:59 AM
02/14/19 04:59 AM
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Joined: Sep 2006
Posts: 1,161 Los Angeles, CA
JF_Moparts
OP
super stock
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OP
super stock
Joined: Sep 2006
Posts: 1,161
Los Angeles, CA
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I'll take a stab. First, the standard hood on a Challenger has the two simulated air intakes much to close to the surface of the hood to be of any use for air intake. Teh main source of air would be at the front of the grill the recessed grill, though sexy as hell on the Challenger, isn't the most aerodynamic. There is a large build up of pressure at speeds. Some of this is good for cooling as the higher pressure will push air through the radiator.
With that said, it is doubtful that is the source of the issue. I am guessing that that you are missing or have ill adjusted hood bumpers. There are multiple fixed rubber bumpers at the rear of the hood. If the hinges are adjusted properly, the rear of the hood should rest on them. There are side bumpers that have spring loaded tapered rests that should keep hood from moving side to side and support the center. At the front are two adjustable bumpers that can be raised and lowered to adjust the height of the hood at the front. The latch should be adjusted to pull the hood slightly against the rubber stops on these adjusters while the height of the adjusters keeps hood aligned with fenders.
I'd check these adjusters and bumpers first. I checked all that and it looks good. I even took a few photos showing pretty tight lines when the hood is closed (no misalignment and such). But I did take a closer look at the front grille and can see that the air that passes through either hits the radiator or probably goes straight up against the front of the hood. And the front of the hood is where the movement is. Is this just a normal thing for older Challengers? Maybe blocking off the space to the left and right of the hood latch base would help?
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Re: 70 Challenger hood scoops - anyone improve the aero?
[Re: JF_Moparts]
#2621264
02/14/19 02:05 PM
02/14/19 02:05 PM
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Joined: Jan 2003
Posts: 5,138 East Aurora (Buffalo) NY
RoadRunner
master
|
master
Joined: Jan 2003
Posts: 5,138
East Aurora (Buffalo) NY
|
I'll take a stab. First, the standard hood on a Challenger has the two simulated air intakes much to close to the surface of the hood to be of any use for air intake. Teh main source of air would be at the front of the grill the recessed grill, though sexy as hell on the Challenger, isn't the most aerodynamic. There is a large build up of pressure at speeds. Some of this is good for cooling as the higher pressure will push air through the radiator.
With that said, it is doubtful that is the source of the issue. I am guessing that that you are missing or have ill adjusted hood bumpers. There are multiple fixed rubber bumpers at the rear of the hood. If the hinges are adjusted properly, the rear of the hood should rest on them. There are side bumpers that have spring loaded tapered rests that should keep hood from moving side to side and support the center. At the front are two adjustable bumpers that can be raised and lowered to adjust the height of the hood at the front. The latch should be adjusted to pull the hood slightly against the rubber stops on these adjusters while the height of the adjusters keeps hood aligned with fenders.
I'd check these adjusters and bumpers first. I checked all that and it looks good. I even took a few photos showing pretty tight lines when the hood is closed (no misalignment and such). But I did take a closer look at the front grille and can see that the air that passes through either hits the radiator or probably goes straight up against the front of the hood. And the front of the hood is where the movement is. Is this just a normal thing for older Challengers? Maybe blocking off the space to the left and right of the hood latch base would help? It really shouldn't move at all. If the main latch is adjusted down so that the hood is putting some pressure on the rubber stoppers of the front adjusters, it should be nice and tight.
68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1
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Re: 70 Challenger hood scoops - anyone improve the aero?
[Re: RoadRunner]
#2621363
02/14/19 05:30 PM
02/14/19 05:30 PM
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Joined: Jan 2007
Posts: 10,132 A Red State
SNK-EYZ
I Live Here
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I Live Here
Joined: Jan 2007
Posts: 10,132
A Red State
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I'll take a stab. First, the standard hood on a Challenger has the two simulated air intakes much to close to the surface of the hood to be of any use for air intake. Teh main source of air would be at the front of the grill the recessed grill, though sexy as hell on the Challenger, isn't the most aerodynamic. There is a large build up of pressure at speeds. Some of this is good for cooling as the higher pressure will push air through the radiator.
With that said, it is doubtful that is the source of the issue. I am guessing that that you are missing or have ill adjusted hood bumpers. There are multiple fixed rubber bumpers at the rear of the hood. If the hinges are adjusted properly, the rear of the hood should rest on them. There are side bumpers that have spring loaded tapered rests that should keep hood from moving side to side and support the center. At the front are two adjustable bumpers that can be raised and lowered to adjust the height of the hood at the front. The latch should be adjusted to pull the hood slightly against the rubber stops on these adjusters while the height of the adjusters keeps hood aligned with fenders.
I'd check these adjusters and bumpers first. I checked all that and it looks good. I even took a few photos showing pretty tight lines when the hood is closed (no misalignment and such). But I did take a closer look at the front grille and can see that the air that passes through either hits the radiator or probably goes straight up against the front of the hood. And the front of the hood is where the movement is. Is this just a normal thing for older Challengers? Maybe blocking off the space to the left and right of the hood latch base would help? It really shouldn't move at all. If the main latch is adjusted down so that the hood is putting some pressure on the rubber stoppers of the front adjusters, it should be nice and tight. If the hood is moving any, the front latch isn't adjusted properly to hold the hood down on the hood bumpers. If with the hood latched down you can move the hood any at the front, it's not properly adjusted. It may need the height of the bumpers adjusted or the height of the latch adjusted. If the back is moving it may be because of bad hood hinges. You're looking for a reason why it's moving and thinking it's airflow, which is indirectly why because it's an adjustment issue.
Kayse can't keep up at all now. lol
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Re: 70 Challenger hood scoops - anyone improve the aero?
[Re: Pacnorthcuda]
#2622167
02/16/19 03:42 PM
02/16/19 03:42 PM
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Joined: Nov 2004
Posts: 25,050 Texas
GoodysGotaCuda
5.7L Hemi, 6spd
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5.7L Hemi, 6spd
Joined: Nov 2004
Posts: 25,050
Texas
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The scoops are NOT lifting your hood! The MASSIVE amount of air in the engine compartment is lifting your hood! Bingo
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