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PV AUTO
Samba Member
Joined: October 10, 2007
Posts: 67
Location: SAN DIEGO
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 Posted: Sat Jun 01, 2024 3:18 pm Post subject: Lightweight drums |
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So I bought a old 80s sand rail and came with some unique lightweight drums. Does anybody remember these? They look like they had alot of work to make them look like this. Looks like a death trap though lol
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Vanapplebomb
Samba Member
Joined: November 03, 2010
Posts: 5572
Location: Holland, MI
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| Posted: Sat Jun 01, 2024 3:32 pm Post subject: Re: Lightweight drums |
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Not for serious stopping. Imagine how quickly they would heat soak with such little mass on the friction surface 
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http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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FarmerBill 
Samba Member
Joined: July 25, 2017
Posts: 865
Location: New England
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| Posted: Sat Jun 01, 2024 3:45 pm Post subject: Re: Lightweight drums |
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| Chromed too. That can't help with the heat. |
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 79493
Location: Sneaking up behind you
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| Posted: Sat Jun 01, 2024 5:36 pm Post subject: Re: Lightweight drums |
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I don't see any brake linings or shoes.
Show car.
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Glenn
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 52775
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Sat Jun 01, 2024 5:41 pm Post subject: Re: Lightweight drums |
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I agree, but I do see shoes and lining peeking out on the sides. those are pretty good, but in this case much more pretty than good.
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 79493
Location: Sneaking up behind you
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| Posted: Sat Jun 01, 2024 6:00 pm Post subject: Re: Lightweight drums |
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| busdaddy wrote: |
| I agree, but I do see shoes and lining peeking out on the sides. |
Now I see them, the holes are not see through.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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oprn
Samba Member
Joined: November 13, 2016
Posts: 14760
Location: Western Canada
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| Posted: Sun Jun 02, 2024 5:16 am Post subject: Re: Lightweight drums |
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I would limit those to 40 mph maximum on back country trails and sand. Or on and off the trailer at car shows.
I think those would flex enough to make for a spongy brake peddle. They would shed water and sand pretty well though...
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Dusty1
Samba Member
Joined: April 16, 2004
Posts: 2097
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| Posted: Sun Jun 02, 2024 6:52 am Post subject: Re: Lightweight drums |
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Brakes just slow you down. The brakes on my old VWs are fantastic compared to brakes on my old motorcycles. Y' all are spoiled rotten with these new fangled disks with ABS and stuff.
Then again, y' all lived long enough to tell about it... 
Drill 'em fulla holes on a sand buggy. That lets the sand out. Otherwise the sand grinds away at the shoes and makes the drums all groovy.
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NJ John
Samba Member
Joined: September 21, 2007
Posts: 2882
Location: HdG, MD & NJ
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| Posted: Sun Jun 02, 2024 8:45 am Post subject: Re: Lightweight drums |
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Yes, I’m sure that a 100% sand modification. Probably locks up the rear wheels of the rail, just fine.
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Busstom
Samba Member
Joined: November 23, 2014
Posts: 4579
Location: San Jose, CA
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| Posted: Sun Jun 02, 2024 9:23 am Post subject: Re: Lightweight drums |
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What's odd is, it looks like the majority of the backing plate has been machined away too, which would make for more sand ingress in the first place. But some of the plate must remain, or what else could be holding the slaves and shoes?
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| cory464 wrote: |
| if you aren't perfectly centered in the hole you will have issues when you tap it. |
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QRP
Samba Member
Joined: April 27, 2008
Posts: 1887
Location: NORTH HOLLYWOOD,CA
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| Posted: Sun Jun 02, 2024 10:25 am Post subject: Re: Lightweight drums |
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| Dusty1 wrote: |
Brakes just slow you down. The brakes on my old VWs are fantastic compared to brakes on my old motorcycles. Y' all are spoiled rotten with these new fangled disks with ABS and stuff.
Then again, y' all lived long enough to tell about it...
Drill 'em fulla holes on a sand buggy. That lets the sand out. Otherwise the sand grinds away at the shoes and makes the drums all groovy.
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Anyone who has ever been to the dunes knows that once you let off the gas you basically stop moving!
This is perfectly acceptable for a dedicated sand car.
No matter what the sand will get into the drums so the idea behind this is to get the sand out faster.
Although I wouldn't have drilled such large holes on the OD and instead made more smaller ones. |
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67rustavenger
Samba Member
Joined: February 24, 2015
Posts: 11080
Location: Oregon
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| Posted: Sun Jun 02, 2024 10:34 am Post subject: Re: Lightweight drums |
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| QRP wrote: |
| Dusty1 wrote: |
Brakes just slow you down. The brakes on my old VWs are fantastic compared to brakes on my old motorcycles. Y' all are spoiled rotten with these new fangled disks with ABS and stuff.
Then again, y' all lived long enough to tell about it...
Drill 'em fulla holes on a sand buggy. That lets the sand out. Otherwise the sand grinds away at the shoes and makes the drums all groovy.
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Anyone who has ever been to the dunes knows that once you let off the gas you basically stop moving!
This is perfectly acceptable for a dedicated sand car.
No matter what the sand will get into the drums so the idea behind this is to get the sand out faster.
Although I wouldn't have drilled such large holes on the OD and instead made more smaller ones. |
Drilling the drums to let the sand out is old school tech from 40+ years ago.
I had seen it on many sand cars back in the day at Pismo Beach.
Yes back then the holes were drilled that large and the backing plates cleared as well.
I have never seen the web portion of the drums drilled, so that's a new one to me.
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EVfun
Samba Member
Joined: April 01, 2012
Posts: 6152
Location: Seattle
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| Posted: Sun Jun 02, 2024 1:44 pm Post subject: Re: Lightweight drums |
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| Busstom wrote: |
| What's odd is, it looks like the majority of the backing plate has been machined away too, which would make for more sand ingress in the first place. But some of the plate must remain, or what else could be holding the slaves and shoes? |
I remember seeing a sand rail where it looked to me like they un-spot-welded the sheet metal part of the backing plate off the stronger stamped center strap. The drums where not drilled. I think the backing plate modification pretty much necessitates the use of '64 or earlier brakes, with the narrow slot wheel cylinder and adjusters, since those slots are the only thing locating the brake shoes (no center hold down spring).
I have wondered if that modification is safe. It would look pretty cool on the front of a beach buggy.
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| Wildthings wrote: |
| As a general rule, cheap parts are the most expensive parts you can buy. |
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Dusty1
Samba Member
Joined: April 16, 2004
Posts: 2097
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| Posted: Sun Jun 02, 2024 4:22 pm Post subject: Re: Lightweight drums |
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| 67rustavenger wrote: |
| I have never seen the web portion of the drums drilled, so that's a new one to me. |
When I say, "I'm into bikes." most people assume motorcycles. I've cut down to maybe three dozen motorcycles. I still have a ton of bicycles. The old school lightweight bicycles use a substance called
drillium
which replaces metal with negative space I mean holes. Old Campagnolo parts are loaded with holes all carefully drilled and chamfered by a real old school craftsman.
I wandered around the Nationals yesterday looking at drilled out parts among other things. The proliferation of finite element analysis and CNC facilitates some fancy patterns. 
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 79493
Location: Sneaking up behind you
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| Posted: Sun Jun 02, 2024 4:39 pm Post subject: Re: Lightweight drums |
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| Dusty1 wrote: |
I still have a ton of bicycles. The old school lightweight bicycles use a substance called
drillium
which replaces metal with negative space I mean holes. Old Campagnolo parts are loaded with holes all carefully drilled and chamfered by a real old school craftsman. |
Carbon fiber
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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