911 Brakes 3" vs 3.5", What am I missing and |
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911 Brakes 3" vs 3.5", What am I missing and |
jesiv |
Aug 26 2008, 01:41 AM
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#21
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Senior Member Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California |
Ok so I am upgrading to a 911 suspension (Seperate Thread http://www.914world.com/bbs2/index.php?showtopic=87337 ). Then I hear brake caliper bolt spacing 3.5 vs 3.0. So (IMG:style_emoticons/default/WTF.gif) WTF is 3" vs 3.5" Am I making a mistake going with 3.0 vs 3.5? I really don’t understand the issues. Do I care?
Thanks for real world opinions! Regards, James |
PRS914-6 |
Aug 27 2008, 04:27 PM
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#22
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None |
When I make a change like this I always try to get the best bang for the buck. In this instance why spend money on 911 3" when you can probably get 3.5 spacing for about the same or a little more. In the future you will have more options for those struts including kits with adapters for very large brakes if you ever need them.
I battled this same decision and decided to go right to the max. I'll never need more. 964RS brakes on 3.5 spacing with adapters. The cost was only a few hundred more than going with smaller components You can also see the red Tarret sway bar done at the same time with additional reinforcing added |
ArtechnikA |
Aug 27 2008, 05:12 PM
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#23
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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 |
You can also see the red Tarret sway bar done at the same time with additional reinforcing added I'm not sure I agree on the really big brakes but if 'A' calipers can be had for the same price out the door (insluding the strut package) as M's I couldn't argue. Of course, he already has the '72 M-brake struts sogoing bigger could be considered an upgrade path. Swapping in a pair of built-up big-brake struts 'should' be an afternoon job. (And I'm sure I wouldn't have painted the brake pipes, but it's your car, do what you like...) AFAIK, Ira Tarret is the only one who 'gets it' that the 'standard' 8mm droplink hardware is marginal - his stuff is 10mm. (Lost a car to droplink failure, this is a sore subject with me.) The 911 project will be using Smart bars but Tarett droplinks. FWIW, and out of the scope of this thread, I'm reconsidering my long-held belief on disk slot direction. I've always done it the way you have it, which matches the drilled-rotor pattern on 911's. However, Brembo is recommending the other direction on cars with trailing calipers. After years of doing it the traditional Porsche way, when I did the slotted rotors on the Subie (trailing calipers) I went with Brembo's suggestion. *Mostly* I think it doesn't matter. The only place it seems to make a visible difference is the angle at which the slot first contacts the edge of the pad. This may be a distinction without a difference - like I said - I'm thinking about it. I still mount drilled rotors with the spiral in the conventional direction, even tho my drilled-rotor cars have straight vents, not the curvy ones that inspired the pattern originally... |
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