Has anyone used these? 9.5”x2.5” aluminum drums. https://www.summitracing.com/parts/aaz-2c18000/year/1970
I was reading comments that said they are 2.5 pounds lighter than the cast iron. Seems like they should be much lighter than that.
Mid 80's V-6 Camaro's all had them, I bought like 5 sets from a local junk yard back in the mid 90's, put a set on my GN and the GS, sold the rest in BG. They where a bolt on for the GN, had to open the center hole a bit for the GS. They weren't worth any ET on either car.
I too had to open the center holes. thought I would save some et, didn't. course I didnt pick anything up when I went to al wheels from steel, nor did I pick up when I went from steel fenders and hood to fiberglass. I sure would like to see these tenth per hundred pounds. my car is like 3500 and with me closer to3800 if not over........cant weight to hit the scales this year to see what the 4 wheel disc brakes free up in weight.
Wow, that’s really frustrating. Makes me want to just keep the old steel drums. Disk brakes are heavier if I recall. But better on the rotating mass?
Here’s an article. A whole lot of baffling people with science talk... just forward to the last paragraph for the results. 0.2mph and a few one hundredths of a second on paper. https://www.hotrod.com/articles/hppp-0411-aluminum-rear-brake-drums/
They appear to be out of stock everywhere and have been for about 6 months or more. Cardone are some peculiar folks I wonder if they did one run of these and dropped the product?
Cardone is a mass market rebuilder and supplier. Would guess they are one of the major players in supplying Auto Zone, O'reillys, NAPA, CarQuest, Advance and others. Probably not worth it to them to supply aluminum drums for car lines that went out of production 31 years ago. Used to see aluminum rear drums on certain GM A cars, but they tended to be late seventies Monte Carlos. (78-80). Some of the MC's also had aluminum hoods and trunk lids for a spell. Other A/G cars purportedly had aluminum radiator supports, also.
Factory disc maybe, but what I put on there is no way, it seems like after putting everything across the scale I should had shed about 70ish pounds and halfords more should be rotating http://www.v8buick.com/index.php?threads/racecar-needs-more-stopping-power.341193/
If you run used aluminum drums, inspect the lug holes closely, they are prone to cracking due to over tightening.
That's why I never allow any garage to rotate tires. They supposedly use torque sticks, but I have watched so-called "technicians" crank the wheels on with the old Ingersoll Rand (now usually electric) wrench with nothing but an impact socket and not even a proper tightening sequence. On my dodge I had one nut so tight that I had to go to a local garage to have the nut removed with a higher capacity air wrench then mine. I wonder why I have a disc brake pulsation?
The way they do it is to tighten them to 150 ft lbs with the impact gun and then check them with a torque wrench set at 50 ft lbs and tell you "yep, you're good to go "
For anyone interested it appears the Cardone 2C-18001 aluminum brake drums are back in stock at Summit Racing. Price is $95 ish each.
If anyone is using the 9 1/2" x 2 1/2" aluminum drums on either the 1977 & earlier or the 1978 & later -- I have some ++ N.O.S. ++ Asbestos ++brake shoes (not too many, though --- about four (4) early & about (5) later) which are ** critical ** such that you don't RIP up those drums with this new garbage braking material that the whole current world is forced to sell, because of Asbestos laws.... Don't wait until I am out -- you will regret it......
