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saltfever
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« on: March 09, 2010, 02:34:07 AM » |
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3E (page 30, new book) says you need ". . . a forward-pointing fresh air intake system pointing at the driver". If you have glass windows where do you put this intake? On a Production Class car can there be a NACA duct on the roof? Can there be a fire-protected tube through the firewall to the front of the car? or?
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SPARKY
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« Reply #1 on: March 09, 2010, 09:38:54 AM » |
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What they are attempting to do is two fold:
1. Primarily gives you fresh air so you aren't overcome by fumes
2. Pressurise the drivers compartment to keep fumes, smoke, and flames out.
In my opinion the closed system to the frt would be more predictable in performance
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Cajun Kid
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« Reply #2 on: March 09, 2010, 12:16:35 PM » |
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I also think there has to be an "exhaust or out let vent too"
So air coming in to the driver and a place for the air, smoke, fumes ,, etc... to depart ?
This is how I understand it and how I am doing in on the Stude.
Charles
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saltfever
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« Reply #3 on: March 10, 2010, 03:40:33 AM » |
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Charles, where are you putting your intake scoop? I have seen NACA ducts on lexan windows but have seen nothing on vehicles with glass. How do they get fresh air?
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SPARKY
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« Reply #4 on: March 10, 2010, 09:05:23 AM » |
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CK beware of the venting rule
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Joe Timney
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« Reply #5 on: March 10, 2010, 09:19:57 AM » |
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Run a 1.0" piece of tubing forward thru the firewall from the cockpit past the motor so you get fresh air even if the motor is smoking.
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Stainless1
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« Reply #6 on: March 10, 2010, 09:38:47 AM » |
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CK, you have a front motored car, be careful that you don't create a flame path and a supply of fresh oxygen for a fire. Joe T has the correct idea, pipe the air directly to the helmet, put a shut off on it to regulate the air you get... could be a lot at 200.
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Stainless
MSA Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.
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Cajun Kid
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« Reply #7 on: March 10, 2010, 09:54:30 AM » |
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I have not installed anything yet.
I will have Lexan side windows in place of the factory door glass. I had planned on a NACA duct on drivers door window(where a front quarter window would have been).. then a reveresed NACA in the Right rear little back seat side window, to "pull"/vent cabin air out.
I thought this rule was to "POINT" fresh air in the cabin and an exhaust vent to Pull the smoke, fumes,dust,, etc... out... that was my plan,,, I was not piping this air to my helmet,,, just pointing the intake duct that direction...
I plan on using a cool air helmet air system piped direct from cooler behind drivers seat to my helmet for B'Ville..
Maybe I am all wrong,,, suggestions ??
Charles
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« Last Edit: March 10, 2010, 10:00:26 AM by Cajun Kid »
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« Reply #8 on: March 10, 2010, 10:00:03 AM » |
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All I do is crack open the drivers side vent window, never had a problem with tech. Last year when I blew the right turbo and filled the car full of smoke, the smoke cleared out real quick.
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Cajun Kid
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« Reply #9 on: March 10, 2010, 10:02:20 AM » |
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GH,, that is what I was thinking... I will not have a vent/quarter window,, I am using Lexan,, so that is why I thought a NACA would be ok..
Thanks for all youe help and input,,, keep the suggestions coming.
Charles
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« Reply #10 on: March 10, 2010, 11:51:54 AM » |
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Gary, tech might miss it, but I will bet Dan and J.D. won't. The rule says FORWARD FACING. I would check with them about a NACA duct also, but I would think it would be o.k
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Bob Drury
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Joe Timney
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« Reply #11 on: March 10, 2010, 01:35:40 PM » |
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I would not put a rear facing duct in the back as it will create a wind tunnel effect!!!
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maguromic
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« Reply #12 on: March 10, 2010, 02:30:06 PM » |
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Charles, where are you putting your intake scoop? I have seen NACA ducts on lexan windows but have seen nothing on vehicles with glass. How do they get fresh air?
Saltfever, One of the cars I have has glass all the way around. The windshield wiper mechanism was removed and the air was ducted through the opening to the drivers’ compartment. This would work on older body styles that had wipers protruding out the cowl top. You also could make the intake a little more cleaner and less aero drag than the on my car. On newer cars without a cowl, use the same concept and just pick up the air below the windshield. Tony  Inside drivers compartment  |
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« Last Edit: March 10, 2010, 02:38:22 PM by maguromic »
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Cajun Kid
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« Reply #13 on: March 10, 2010, 06:08:11 PM » |
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I would not put a rear facing duct in the back as it will create a wind tunnel effect!!!
Joe, If there is no rear/outlet duct,,, how would the incoming air from the front NACA exit ? Where would any fumes or smoke exit ? Thanks Charles |
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ECTA Record Holder Maxton E/CBFALT, E/CBGALT, E/CGALT, E/CFALT, A/CGALT, C/CGALT, D/CGALT, C/CBGALT, B/CBGALT, C/CFALT OHIO C/CGALT LTA Record Holder A/CBFALT, B/CBFALT, C/CBFALT, C/CFALT, E/CGALT, E/CFALT Fastest Standing Mile at Ohio 195.51mph Fastest Standing Mile at Maxton 191.006mph Fastest Standing 1.5 Mile at Loring 188.31mph http://s261.photobucket.com/albums/ii43/cajunkid5690/Blog www.venablerodsandracing.comemail venableracing@gmail.com |
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bvillercr
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« Reply #14 on: March 10, 2010, 07:11:25 PM » |
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I would not put a rear facing duct in the back as it will create a wind tunnel effect!!!
Joe, If there is no rear/outlet duct,,, how would the incoming air from the front NACA exit ? Where would any fumes or smoke exit ? Thanks Charles Your car will not be 100% sealed from the air, if it is you should bring it to El Mirage and race it.  |
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