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Easy there tiger, don't take my word for it - read Steve@Rennsports comments on turning rotors: https://rennlist.com/forums/911-forum/977018-turn-rotors-on-911-a.html Brake disc question 930 brake rotors Thickness? I'm certainly not advocating wasting money - my point is that there are things you don't skimp on -brakes and steering being at the top of my list, and that there are other marques that are more economical to maintain.
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Bone stock 1974 911S Targa. 1972 914/4 Race Car |
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Brew Master
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Not sure what he's talking about. Stock thickness is 24 mm. Minimum is 22mm. I'm still above minimum even with the turning that was done. There's a reason they list a minimum thickness. Having brake rotors turned isn't really "skimping" IMO. I have had the rotors turned of almost every vehicle I have owned including an F350 that was used almost strictly for pulling a 3900lb trailer with machines weighing over 8000lbs. I have never suffered a failure due to turned rotors. I have OTOH suffered problems related to stuck caliper pistons and a brake line rupture. So if I were to call something "skimping" I'd have to say it's rebuilding calipers or driving around on old brake lines. |
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Join Date: Apr 2016
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He means 322 mm in diameter, not thickness. And calipers are meant to be rebuilt, hence the availability of replacement pistons and seals. Rotors are a known disposable part.
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Don't get me wrong here. I'm simply going to end the myth here that rotors are supposed to be tossed. It's a silly notion that is based on no real fact. If all four brakes are working properly, there's no reason you shouldn't turn rotors unless their is noticeable bluing of the rotor meaning they have gotten WAY too hot. Then, yes, you get rid of them because they have lost some of the tempering. Otherwise, turning a rotor does not make them any less safe or places like Oreilly's wouldn't do it nor would the shop that did mine. Last edited by cabmandone; 08-22-2017 at 02:20 PM.. |
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1988 930 Venetian Blue |
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Brew Master
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On second thought though, I know most of the judges so... no, not really. The worst part is, I was a judge one year and STILL lost. ![]() |
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Cab,
When I first read the thread, I was solidly in the "just buy new ones camp." Now, you won me over, I think since rotors have become so cheap, most of us just replace, or we've run them so long that they couldn't be turned safe. On the other hand is my DD Toyota which are probably cheaper to buy new than get turned and since I park it outside, they usually have a "nice" rust crust on the outer edge. One less thing in the landfill, well they do get recycled, but that takes energy too. Best, Rutager
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Rutager West 1977 911S Targa Chocolate Brown |
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Yours aren't too thin, however. They just aren't working the way you want them to. Finally, back when Porsche made the rotors for your car, they were the only ones making them. If you wanted a replacement, they were probably $500 each from the dealer. Now, there are aftermarket rotors that cost next to nothing. What year is your car? Pelican has rotors for a 1983 for example, that are TWENTY TWO DOLLARS. That's right, 22 bucks for a rotor. Pelican Parts - European Automotive Parts and Accessories - Porsche • BMW • Mercedes • Volkswagen • Audi • Saab • Volvo • MINI Why would you ever fcuk around with turning them when they can be had for 22 bucks? Just the bandwidth you wasted on this thread is worth 22 bucks alone. |
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Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
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Jeff 74 911, #3 I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible. |
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Brew Master
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Please... don't hesitate to move along now and stop wasting your time. |
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83 911 Production Cab #10
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Amen...
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Who Will Live... Will See ![]() ![]() ![]() 83 911 Production Cab #10, Slightly Modified: Unslanted, 3.2, PMO EFI, TECgt, CE 911 CAM Sync / Pulley / Wires, SSI, Dansk Sport 2/2, 17" Euromeister, CKO GT3 Seats, Going SOK Super Charger |
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Brew Master
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One more side thread for brake geeks
I asked if people thought the direction of rotor air scoops (in the middle of the rotor) mattered about a week ago on Cayenne forum (Early Cayenne Turbo's are HEAVY cars, big brakes) and I got a ton of opinions and learned more than I though I would. https://rennlist.com/forums/porsche-cayenne-forum/1005857-rotors-does-l-r-side-really-matter.html |
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Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
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Jeff 74 911, #3 I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible. |
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