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Kirkham Motorsports

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  #21 (permalink)  
Old 04-10-2019, 04:43 AM
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I am not completely sold on that video. I wonder if you put the strings in front of the hood scoop instead of laying down onto it... I would like to see the air moving in front of the scoop. the issue I have is the front of the car isn't exactly great I am concerned with turbulent air due to the shape of the front of the car. I'm looking at the boundary layer. The Dodge can't have to use a higher scoop to grab air, the scoop on a cobra is barely 2 in tall.

I do believe that the intake has to be sealed to get cool air
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  #22 (permalink)  
Old 04-10-2019, 11:11 AM
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yes to be the best it can be. But that should be a high pressure point and should have air coming in I would think and make it cooler around the intake even without a sealed turkey pan.
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  #23 (permalink)  
Old 04-10-2019, 11:19 AM
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Quote:
Originally Posted by Jdata View Post
I am not completely sold on that video. I wonder if you put the strings in front of the hood scoop instead of laying down onto it... I would like to see the air moving in front of the scoop. the issue I have is the front of the car isn't exactly great I am concerned with turbulent air due to the shape of the front of the car. I'm looking at the boundary layer. The Dodge can't have to use a higher scoop to grab air, the scoop on a cobra is barely 2 in tall.

I do believe that the intake has to be sealed to get cool air
There's no reason you couldn't put yarn strands on top and bottom. Shoot the video and let us know what you find out.
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  #24 (permalink)  
Old 04-10-2019, 12:30 PM
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Love the free expression of knowledge, experience and opinions here.

So much to learn!

Well cycleguy55. Are you up to another "double tuft test"?

Cheers
Greg
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  #25 (permalink)  
Old 04-11-2019, 10:46 AM
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Love the free expression of knowledge, experience and opinions here.

So much to learn!

Well cycleguy55. Are you up to another "double tuft test"?

Cheers
Greg
I will when: a) the car is running; and b) when I figure out how to mount the camera to get the shot.
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Old 04-12-2019, 02:08 PM
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Anyone put thought to the scoop causing a vacuum on the carb at higher speeds?
Jon
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Old 04-14-2019, 06:45 AM
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I will when: a) the car is running; and b) when I figure out how to mount the camera to get the shot.
Thank you for doing this!

GoPro suction mount?
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  #28 (permalink)  
Old 04-15-2019, 04:33 AM
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What happens at 120 mph?

Does the scoop work at those speeds?
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  #29 (permalink)  
Old 04-15-2019, 06:51 AM
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Default Drag racing

Iíve been on the track several times and in 3rd gear I hit a wall around 5k
Motor was dynoíd At 500hp @6k...I added a electric pump behind the mech and it pulls strong to 5400... so Iím wondering if the scoop is causing a vacuum effect?? Iím going to try running with out the air filter and closing the scoop and see if the corrects the problem. I have had the car up to 125mph but taking it up there slower
Jon
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Old 04-15-2019, 09:46 AM
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Iíve been on the track several times and in 3rd gear I hit a wall around 5k
Motor was dynoíd At 500hp @6k...I added a electric pump behind the mech and it pulls strong to 5400... so Iím wondering if the scoop is causing a vacuum effect?? Iím going to try running with out the air filter and closing the scoop and see if the corrects the problem. I have had the car up to 125mph but taking it up there slower
Jon
Was it dyno'd with the same configuration that's installed in the car, including the same air filter, fuel pump and exhaust system? It's unlikely it was dyno'd w/o mufflers or other restriction, and entirely possible it was dyno'd w/o the air cleaner - meaning your problem may have absolutely nothing to do with the scoop.

Regardless, if you're trying to isolate a problem you'll be working at cross-purposes if you change more than one thing at a time. I wouldn't want to run an open scoop without an air filter, so I'd start by leaving the air filter on and blocking off the scoop. If that makes a difference, then great. If not, the next try is with the air cleaner removed.


Good luck in tracking it down!
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  #31 (permalink)  
Old 04-15-2019, 10:13 AM
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Default Dyno

It was dynoíd with out the second fuel pump. Adding a electric pump to get the fuel to the mech pump helped but not enough...Iím going to try it with out the air filter, the with the scoop closed....
Jon
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