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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 9:26 am 
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Joined: Mon Oct 14, 2002 6:08 pm
Posts: 623
Location: Raleigh, NC
Actually, I think this may be in reference to a new EP S2000 that Mike is building.

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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 10:09 am 
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Joined: Thu Oct 03, 2002 10:34 am
Posts: 2844
Location: Wauwatosa, WI
i. Brake Ducting
1. Brake air ducts can be fitted.
2. The front brake duct inlet(s) must not extend to the side beyond the centerlines of the front
wheels, or forward of the forward most part of the front of the body or front air dam.

Duct, screen, attaching apparatus in my mind all become part of the duct and SHALL be behind a plumb bob dropped from the outermost contour of the body. With the radiator screen rule update, didn't aero become part of the issue. Can you post a picture, likely some positive thoughts will flow. :think:

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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 10:19 am 
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Joined: Fri Oct 01, 2010 9:21 am
Posts: 1142
Thanks for the explanation. Thought I was losing my mind for a second.

Image

This car has been through the runoffs tech shed a few times, and clearly has grills/mesh over the brake intakes.

Is it black-and-white legal and specified in the rule? No. Clearly you can have a brake duct without having any screen in front of it. Adding a screen goes beyond what is in the book.

That said, no one seems to care.


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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 10:24 am 
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Joined: Sun Jan 23, 2011 4:54 am
Posts: 1797
blamkin86 wrote:
Thanks for the explanation. Thought I was losing my mind for a second.

Image

This car has been through the runoffs tech shed a few times, and clearly has grills/mesh over the brake intakes.

Is it black-and-white legal and specified in the rule? No. Clearly you can have a brake duct without having any screen in front of it. Adding a screen goes beyond what is in the book.

That said, no one seems to care.


as original poster has explained, his particular situation does not allow him to install screens in the same fashion as Matt's car. the screens would need to go on the outside of the bumper, which per the rule would be illegal if nothing can protrude past the surface of the bumper in that spot to pass the plumb bob test.
again, methinks someone has to have an axe to grind if they are going to protest over whether a 4" piece of screen is going to make or break the difference on the track....

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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 10:41 am 
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Joined: Thu Oct 03, 2002 10:34 am
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Location: Wauwatosa, WI
With the #71 car shown are the air dam extension/extension attaching rivets and or the air duct/screen attaching rivets behind or beyond the outline of the body? It's a Texas car dude, check it out.

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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 10:48 am 
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Joined: Mon Sep 16, 2002 2:45 pm
Posts: 36
Location: Gloucester Point, VA
Yes, this is for a new car build (S2000). Based on the feedback I think the safe approach will be to make a curved screen that fits inside the duct. Better safe than sorry.

Thanks for all the ideas and discussion.

Mike

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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 10:52 am 
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Joined: Thu Oct 03, 2002 10:34 am
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Location: Wauwatosa, WI
For another thought, PM site member Aaron Johnson who has an S2000 E prod car.

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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 11:49 am 
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Joined: Thu Nov 12, 2009 6:01 am
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For the 93 up RX7's we made a wire frame to match the opening and put mesh over that. Sat back about .25 and had a small tab on either side to screw them to the bumper cover. Meets the rules and easy to remove for cleaning.


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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 4:01 pm 
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Joined: Sun Nov 08, 2009 12:58 pm
Posts: 453
Location: SJ
Maybe this will help..

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 Post subject: Re: Brake Duct Screens
PostPosted: Fri Jul 20, 2018 4:57 pm 
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Joined: Wed Jan 13, 2010 10:58 am
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Velocity stack screen in the end of the hose.

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