Login    Forum    Search    FAQ

Board index » Racing Forum » General Topics




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post Posted: Thu Sep 29, 2011 8:44 pm 
Offline
User avatar

Joined: Wed Dec 06, 2006 9:24 pm
Posts: 5071
Location: Elizabethtown, KY
VENT TUBE FIRE RESTRICTORS

The problem…Fire

Fire, the most feared occurrence for a race car driver. What can we do to minimize this threat? We currently mandate protective clothing, we mandate on-board fire extinguishing systems, what else can we do?

We can address the likely places where fuel can come into contact with hot engine components, such as exhaust headers. In this context, the most logical area to address is the vent tubes on carburetors.

Whenever a race car impacts the retaining wall, turns over in a roll-over crash, turns over on its side, even slams down to earth after a violent wheel stand, raw fuel can surge or splash out of the carburetor vent tubes. The average carburetor float bowl contains approximately 80 to 100 cc’s of gasoline, depending on the float settings, and each 4-barrel carburetor has two float bowls. 160 to 200 cc’s of gasoline (almost 7 ounces of gasoline) on hot engine parts is more than enough to ignite a serious fire, and you can double the fuel volume on dual carb engines. Even shutting off an electric fuel pump with the battery cutoff switch will not stop the fuel from coming out of the vent tubes in many situations. And once the fire starts….

The solution… Vent Tube Fire Restrictors

Accufab's billet aluminum Vent Tube Fire Restrictors, a simple and inexpensive ball-check valve, installed on each vent tube will minimize or restrict any raw fuel surge through the vent tubes without restricting the vent tube’s ability to VENT, and takes less than a minute to install. Engine dyno tests conducted at Westech Performance Group in Mira Loma, CA, have demonstrated that Vent Tube Fire Restrictors mounted on race carburetors, in both single and dual carb applications, in back-to-back testing, showed no loss of horsepower or engine performance. Several different Holley, Barry Grant and similar aftermarket carburetor variations were tested. None showed any power losses after the installation of the Vent Tube Fire Restrictors, zero.

Vent Tube Fire Restrictors, available now from Accufab, Inc., (909) 930-1751.

http://i734.photobucket.com/albums/ww342/WR169/0014.jpg

Open vent tubes...

http://i734.photobucket.com/albums/ww342/WR169/0023.jpg

Accufab's billet aluminum Vent Tube Fire Restrictors installed.
__________________

_________________
Steve

6.7772 @ 101.51 1/8th 10.747 @ 122.24 1/4

Image


Top 
 Profile  
 
 Post Posted: Fri Sep 30, 2011 5:11 am 
Offline
User avatar

Joined: Wed Apr 19, 2006 8:20 pm
Posts: 5852
Location: N.J.
Hey thanks for sharing that info Steve!!! =;

_________________
Image
running E85
Best ET 8.07
Best MPH 170.71
Barry


Top 
 Profile  
 
 Post Posted: Fri Sep 30, 2011 8:37 am 
Offline
User avatar

Joined: Wed Dec 06, 2006 9:24 pm
Posts: 5071
Location: Elizabethtown, KY
I thought it was pretty cool.

_________________
Steve

6.7772 @ 101.51 1/8th 10.747 @ 122.24 1/4

Image


Top 
 Profile  
 
 Post Posted: Fri Sep 30, 2011 11:00 am 
Offline
User avatar

Joined: Wed Apr 19, 2006 4:11 pm
Posts: 2749
Location: Shepherdsville, KY
That would make it a little hard to use a flute. I can see where there would be no difference on a dyno but there could be a difference on the track. Of course it would be easy enough to A/B test.

_________________
Chuck Woloch

Chuck's Automotive
Full line Computech dealer
chucksautomotive@yahoo.com
Image


Top 
 Profile  
 
 Post Posted: Fri Sep 30, 2011 7:12 pm 
Offline
User avatar

Joined: Wed Dec 06, 2006 9:24 pm
Posts: 5071
Location: Elizabethtown, KY
I wonder if the fuel coming up would push the ball up and block the fuel from coming out.

_________________
Steve

6.7772 @ 101.51 1/8th 10.747 @ 122.24 1/4

Image


Top 
 Profile  
 
Display posts from previous:  Sort by  
 
Post new topic Reply to topic  [ 5 posts ] 

Board index » Racing Forum » General Topics


Who is online

Users browsing this forum: No registered users and 3 guests

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron