Brakes/batteries

[14x7]

Wouldn't you think brake rotors that have holes in them would disapate heat faster,and less prone to out of round/highspot? Hasn't anyone ever wonder if these rotors would be off on their daily drivers? Anyone ever wonder what happen to the Batteries that had the switch on top /to turn and use for the reserve power,if the battery died? (MarketingGimmick ? )

Had a 50 packard once.

[Swifster]

The drilled rotors are prone to cracking from heat. The same is true of slotted rotors. If the rotors are vented, the fins direct air into the rotor and out thru the hub area.

You can have the rotor cryo treated (frozen at about -300*) which will extend their life, but the cryo treatment isn't cheap either.

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Tom - Mulberry, FL

1964 Studebaker Daytona - 289 4V, 4-Speed (Cost To Date: $2125.60)

[14x7]

Thanks for the post tom, didn't know that infomation.

Had a 50 packard once.

[Green 53]

The batteries with the switch were a joke. When they came out there was a lot of hype about them. Our suppliers did not have them so I bought a couple on the open market just to show folks what they really were. No way would the little motorcyle size battery in the switch side start a car in cold weather. Both failed on the shelf. They went away in a hurry.
Denny L (Former battery business owner)

[14x7]

Wow, thanks for the reply,I wanted to know why they weren't around now. It seem like a great idea.

Had a 50 packard once.

[Swifster]

quote:Originally posted by 14x7

Thanks for the post tom, didn't know that infomation.

Those drilled and slotted rotors are great for racing. First, professional race shops have the budgets to have them cryo treated. Second, those rotors won't be used more than one race or race weekend. For a short term part they are fine. But if you look at the rotors on a rice rocket, you can usually see the microfractures starting around the holes or slots.

The reason race cars use these types of rotors? Heat is one, but it also helps eliminate the gases from the friction.

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Tom - Mulberry, FL

1964 Studebaker Daytona - 289 4V, 4-Speed (Cost To Date: $2125.60)