Originally Posted by poncho62
Are we talking about drilling the braking surface of the drum or the side of the drum to assist cooling?
A drilled disk brake rotor is on the braking surface, I figure drilling a drum wouldnt be.
Yes Poncho, they do it both ways for cooling and i,m sure it started out for that and other reasons.
and we are talking about on a street car i am anyway not a track car of any kind.