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Re: LM aluminum drums; anyone notice this before
Posted by: martyscarr ()
Date: July 07, 2017 07:09PM

BobV66Vair Wrote:
-------------------------------------------------------
> If someone has the weight of the aluminum drums, I
> can weigh a steel drum.

Buick aluminum drum for the rear, 12.54 pounds. Some clean up work on the lathe brings it to 11.13 pounds.

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Re: LM aluminum drums; anyone notice this before
Posted by: v8vair ()
Date: July 08, 2017 11:29AM

Well its not the fins that need to be trimmed to fit in the stock wheel, its the corner leading outer edge, need to take off a little to get it to fit flat against the wheel hub. Mike

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Re: LM aluminum drums; anyone notice this before
Posted by: martyscarr ()
Date: July 10, 2017 07:12PM

Weight of a stock rear drum = 12.71 pounds

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Re: LM aluminum drums; anyone notice this before
Posted by: BobV66Vair ()
Date: July 10, 2017 10:36PM

Thanks Marty. Only a little weight it seems. Does the aluminum cool faster/better than the steel? That would be a big benefit above the weight.

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: LM aluminum drums; anyone notice this before
Posted by: john.jackson ()
Date: July 11, 2017 12:52AM

BobV66Vair Wrote:
-------------------------------------------------------
> Thanks Marty. Only a little weight it seems. Does
> the aluminum cool faster/better than the steel?


[sciencing.com]

Pure Aluminum conducts 235 watts per Kelvin per meter.

Carbon Steel conducts 45 watts per Kelvin per meter.

Looks like aluminum conducts heat 5 times better than carbon steel.

Plus aluminum drum has way more surface area to transfer heat to air.

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Re: LM aluminum drums; anyone notice this before
Posted by: rowin4 ()
Date: July 11, 2017 05:54AM

I wonder if the 8 lug aluminum brake drums from my Pontiac Bonnivlle would work on a Corvair ? That would look pretty cool.

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Re: LM aluminum drums; anyone notice this before
Posted by: jjohnsonjo ()
Date: July 28, 2017 03:05PM

OK now for the rest of the story. About 20 some years ago when I brought the Vair out of a hibernation I rebuilt the entire brake system. Everything new but the drums, which I had turned down. The shop screwed up both front ones and they were slightly out of round. The answer from the shop was just run them and they will seat. How they could screw that up with the kind of machinery they had, who knows. I also through away a perfectly good set of asbestos linings that were on the car, Two of the dumbest things I have ever done. Most new linings suck compared to the old ones. Bottom line is the drums never wore completely true. Some of the new linings came apart.

I ordered these, they got here quick and looked fantastic. The have a cast iron sleeve for the actual brake surface. I was most concerned about the fins clearing the 13" wheels, but that wasn't an issue. It was the diameter of the hub side that was the problem. It won't fit all the way in the factory 13" wheels. I guess I could have them machined, but that is the worst place to have a weak spot.

Bottom line is they are well made, and a little lighter. They would work great with larger wheels. Anyway I sent them back.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

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Re: LM aluminum drums; anyone notice this before
Posted by: jjohnsonjo ()
Date: July 28, 2017 03:07PM

Ooops

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

Image and video hosting by TinyPic

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Re: LM aluminum drums; anyone notice this before
Posted by: v8vair ()
Date: July 28, 2017 03:42PM

I found the same thing,I'm machining about .080 off the outer corners to clear the stock widened 13" wheels on the 64 Racer.
Im hoping there's no issues. Mike

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Re: LM aluminum drums; anyone notice this before
Posted by: jjohnsonjo ()
Date: July 28, 2017 05:16PM

"I found the same thing,I'm machining about .080 off the outer corners to clear the stock widened 13" wheels on the 64 Racer.
Im hoping there's no issues. Mike"

Let me know how it works out

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

Image and video hosting by TinyPic

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Re: LM aluminum drums; anyone notice this before
Date: July 28, 2017 05:52PM

rowin4 Wrote:
-------------------------------------------------------
> I wonder if the 8 lug aluminum brake drums from my
> Pontiac Bonnivlle would work on a Corvair ? That
> would look pretty cool.
----------------------===================--------------------
Pontiac was most of the way there to offer an 8 lug wheel for the GTO



It was a steel drum wheel, so mostly for looks compared to the Full size Pontiac unit.
Photos released in brochures as you can see with the note that they were not available at the start of production - "ask your dealer" but later a TSB was issued saying these were cancelled for some unknown reason.


Dan Davis ~ Pierce County, WA ~ CORSA Western Director + Corvairs NW + North Cascades Corvairs + Corvanatics
1966 Corsa Turbo coupe ~ ~ 1966 140 Corsa ~ ~ 1965 Monza 140/4 'Vert Sierra Tan/Fawn ~ 1964 Monza 'Vert (SOLD) ~ 1960 Monza Ermine White/Red PG ++ ~ 1965 Monza 140/4 Evening Orchid w/ ivory/black interior ~ 1962 Monza Wagon 102/4 ~ 1963 Rampside/Scamper ~ 1963 Red/Greenbrier ~ 1969 Ultra Van #468

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Re: LM aluminum drums; anyone notice this before
Posted by: rowin4 ()
Date: July 29, 2017 08:10AM

The 8 bolt wheel above statement is not correct, it is a aluminum drum with a cast iron sleeve liner

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Re: LM aluminum drums; anyone notice this before
Date: July 29, 2017 08:37AM

rowin4 Wrote:
-------------------------------------------------------
> The 8 bolt wheel above statement is not correct,
> it is a aluminum drum with a cast iron sleeve
> liner
---------------------------===================--------------------
The illustrations and comments are about an 8 bolt wheel that was proposed for the intermediate Tempest/LeMans/GTO. It never made production, rowin4.
The available optional 8 bolt wheels for the full-size Pontiacs are aluminum castings with iron brake surface inserts along with the steel rim that bolts to them.


Dan Davis ~ Pierce County, WA ~ CORSA Western Director + Corvairs NW + North Cascades Corvairs + Corvanatics
1966 Corsa Turbo coupe ~ ~ 1966 140 Corsa ~ ~ 1965 Monza 140/4 'Vert Sierra Tan/Fawn ~ 1964 Monza 'Vert (SOLD) ~ 1960 Monza Ermine White/Red PG ++ ~ 1965 Monza 140/4 Evening Orchid w/ ivory/black interior ~ 1962 Monza Wagon 102/4 ~ 1963 Rampside/Scamper ~ 1963 Red/Greenbrier ~ 1969 Ultra Van #468

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Re: LM aluminum drums; anyone notice this before
Posted by: eastfizz ()
Date: August 08, 2017 03:12PM

Have been away on vacation for the last month, but noticed this thread before I left. Thought I had a set of aluminum rear drums in an old box - bought them 8 or 10 years ago. Just found them, casting number "1255496 CFD-2," 9.5" I.D., 2.5" wide. Fins all look good. Will clean them up and have them measured to see how much metal is left for turning. Don't think I will be using them, so likely will sell them. Any interest, send me a PM.

Best regards,

Lowell

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Re: LM aluminum drums; anyone notice this before
Posted by: jamesolefjensen ()
Date: August 26, 2017 08:29AM

Hello corvair fans. I'm new to this forum (though I read it all the time).

I'd like to know if anyone has installed these new Cardone aluminum drums on the front of a LM and ran them hard. My 65 Corsa fades after ~10 minutes of spirited back road driveing (faster on the down hills). It has non finned drums all around.

I've been thinking of upgrading to front discs but at less than half the cost (and a fraction of the down time), these aluminum drums are tempting.

I would love to hear about any real world experince. It would help me plan my budget (will these old cars ever be done?)

James
65 Corsa

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Re: LM aluminum drums; anyone notice this before
Posted by: Leon ()
Date: August 26, 2017 09:24AM

I have this type drum on my turbo 140 Monza and drive it rather hard and will say they do seem to be a bit more fade resistance. I also have power brakes, a old Bendix Hydro Vac remote booster hiding behind the left headlight.

Now that I have 16" wheels I will be using a set of Skylark drums on the rear as well, the joys of junkyark diving through very old yards grinning smiley

Star NC
1965 Monza Coupe, turbocharged 140/4spd, Carter AFB 4bbl, E-flow Crown turbo, water/meth injection, driver
1965 Corsa Coupe, 140/4spd, future project
1966 Monza Coupe, 110/4spd parts car
1966 Monza 'vert, 95/PG parts car
1985 Dodge W350 4dr turbocharged 440/4spd



Edited 1 time(s). Last edit at 08/26/2017 09:31AM by Leon.

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Re: LM aluminum drums; anyone notice this before
Posted by: jamesolefjensen ()
Date: August 26, 2017 01:15PM

Thanks for the feedback!

In the pictures I've seen on the web, the mounting flange looks slightly thicker. Any idea of the exact measurement? It doesn't look like enough to change wheel/fender clearance, but I'm curious.

James
65 Corsa

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Re: LM aluminum drums; anyone notice this before
Posted by: Leon ()
Date: August 26, 2017 01:31PM

The mounting flange is about 1/4 inch thicker than the stock drums, something I needed with my rims as they were very close to the steering arms. I replaced the wheel studs when I swapped out the drums because they were too short with my mags.

Star NC
1965 Monza Coupe, turbocharged 140/4spd, Carter AFB 4bbl, E-flow Crown turbo, water/meth injection, driver
1965 Corsa Coupe, 140/4spd, future project
1966 Monza Coupe, 110/4spd parts car
1966 Monza 'vert, 95/PG parts car
1985 Dodge W350 4dr turbocharged 440/4spd

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Re: LM aluminum drums; anyone notice this before
Posted by: jamesolefjensen ()
Date: August 26, 2017 02:13PM

OK, good to know. Again, thanks for the feedback.



James
65 Corsa

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Re: LM aluminum drums; anyone notice this before
Posted by: jjohnsonjo ()
Date: August 26, 2017 02:33PM

I drive mine hard and it takes a lot to get fade with stock. It may be your linings. At any rate the aluminum ones I posted look great, but I didn't use them as it would require machining to work with factory 13" wheels. If you are 14 or larger you are OK. I tried some finned cast iron ones that fit and they work well, but are heavier than stock.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

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