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Old 06-12-2004, 09:36 PM
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Ventilated Drum brakes

I've been reading about ventilated drum brakes on the CH Topping web site. Has anyone heard of this or better yet actually tried it? Any and all feedback is appreciated. Let me know what you think of this...you can check them out at www.chtopping.com Check out the Street Rodder article from 2001 to read about drilled drums. Looks like something that would be easy to do in the home shop. I used to drill the disks for MG brakes and you can feel the difference and I never had a problem from doing it. Let me know what you think - I'm in the mood to try it on my 51 Ford truck drums.

Leaks


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Old 06-13-2004, 07:41 AM
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Venting drum brakes was a reality before disc brakes became common. There were scoops on the backing plates to bring in the air along with other ideals such as finned drums. Never heard of drilling the drums but that does not mean it was not tried. You might do some searching in the NASCAR archives cause they had to have some neat tricks back in the days of 200 mph racing with 4 wheel drum brakes.

Trees
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Old 06-13-2004, 07:47 AM
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Arrow

Used to drill the backing plates and the drum flanges for competition, but I don't think I would want to try it on a car driven in the weather...

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Old 06-14-2004, 07:23 AM
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Quote:
Originally posted by KULTULZ
Used to drill the backing plates and the drum flanges for competition, but I don't think I would want to try it on a car driven in the weather...
Ditto... If you do any driving in the rain this is not a good idea...
Just think about what a load of wet gravel or mud will do to the shoes...
Even for a "race" car I would question the effectiveness of this mod. Any heat generated in a drum brake requires airflow "over" the cast iron to dissipate it. Holes cut into the wheel mounting face will only lessen the surface area and weaken the drum where it is required to be the strongest. The face of the drum is what transfers all of the braking torque from the shoes to the wheels and, with these big holes cut into it, I would be curious as to how much stress is being transmitted through the left over webs...
Just some things to consider...
Mark
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