 Rear Brake Rotor Question, Anyone know the OD of rear 911 rotors? |
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| John |
 Jun 17 2005, 12:20 AM
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#1
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member? what's a member?  Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None  |
I've been looking for the Outside Diameter (OD) of rear 911 vented brake rotors.
If anyone knows, please let me know. Thanks, John |
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| ArtechnikA |
Jun 17 2005, 05:18 AM
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
mine measure up at 290mm.
if you need a lot of decimal places, i don't have the equipment to get closer than that... |
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| davep |
Jun 17 2005, 06:41 AM
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#3
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914 Historian Group: Benefactors Posts: 5,151 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
914/4 282
914/6 286 911 290 If you are using 914 calipers, you might as well turn them down to the appropriate diameter to reduce weight, and inertia. With the 914/4 caliper you need the clearance. The calipers will place the pads in the same place of course, so there is no braking benefit with the extra diameter. Still have a few kits available. |
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| joea9146 |
Jun 17 2005, 06:43 AM
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#4
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Senior Member Group: Members Posts: 663 Joined: 10-February 03 From: Denver, NC Member No.: 283 Region Association: None |
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| John |
Jun 17 2005, 06:03 PM
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#5
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
Thanks for the information.
So, am I getting this right... The 911 rear rotors are larger in diameter than 911 SC front rotors. (The 914-4 and 914-6 rear rotors are both larger diameter than the 911SC rotors). I have been pondering the idea of spacing out a pair of calipers. I was going to try 914-4 rear calipers (for the e-brake), but they would be morre difficult to do as I don't know what to do with the brake pad spreader springs. The 914-4 front calipers would be easier as I could use 911 rear brake pad spreader springs (the pads are the same), but I would loose the e-brake. I suppose for the track car (that already has front calipers on the rear) this is a possibility. Any ideas on brake pad spreader springs for spaced out 914-4 rear calipers? |
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| davep |
Jun 17 2005, 07:05 PM
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#6
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914 Historian Group: Benefactors Posts: 5,151 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
My kit will help you out with most of the parts. The spreader needs to be cobbled together out of a 911 rear, for the width, and a 914/4 rear for the length. Easily done, in fact one of the easier parts to make.
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