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How thick are brand new /4 brake rotors?, front and rear

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Mueller	Jan 27 2005, 04:08 PM Post #1
914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None	thanks (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

Brett W	Jan 27 2005, 04:16 PM Post #2
Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None	Not thick enough. .433 in I am looking at another option that should be a bolt on upgrade to an .810 vented rotor and a four pot caliper. I'll keep you posted when I have the other parts to compare to.

Part Pricer

Jan 27 2005, 04:17 PM

Post #3

Believe everything I post

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Posts: 1,825
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914-4 Front Brake Discs
Brake disc thickness	11.0 mm +0.05 -0.15	.433 in + .002 -.005
Min thickness of disc after turning	10 mm	.395 in
Wear limit of brake disc (symmetrical wear)	9.5 mm	.375 in
Thickness tolerance of brake disc	0.02 mm max	.0008 in
Later wobble (deflection) of brake disc installed	0.2 mm max	.008 in
914-6 Front Brake Discs
Brake disc thickness	20 -0.2 mm	.787 - .008 in
Min thickness of disc after turning	18.6 mm	.732 in
Wear limit of brake disc (symmetrical wear)	18.0 mm	.709 in
Thickness tolerance of brake disc	0.02 mm max	.0008 in
Later wobble (deflection) of brake disc installed	0.2 mm max	.008 in

914-4 Rear Brake Discs
Brake disc thickness	9.5 -.02mm	374 -.008 in
Min thickness of disc after turning	8.9 mm	.351 in
Wear limit of brake disc (symmetrical wear)	8.5 mm	.335 in
Thickness tolerance of brake disc	0.02 mm	.0008
Later wobble (deflection) of brake disc installed	0.2 mm	.008
914-6 Rear Brake Discs
Brake disc thickness	10.5-0.2 mm	.413 -.088 in
Min thickness of disc after turning	9.5 mm	.374 in
Wear limit of brake disc (symmetrical wear)	9.0 mm	.354 in
Thickness tolerance of brake disc	.02 mm	.0008
Later wobble (deflection) of brake disc installed	0.2 mm	.008 in

Mueller

Jan 27 2005, 04:48 PM

Post #4

914 Freak!

Group: Members
Posts: 17,146
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None

QUOTE (Brett W @ Jan 27 2005, 03:16 PM)

Not thick enough.

.433 in

I am looking at another option that should be a bolt on upgrade to an .810 vented rotor and a four pot caliper. I'll keep you posted when I have the other parts to compare to.

how funny.....I spoke to a Wilwood engineer a few weeks ago that gave me a sneak peak (pdf file) of their new line of 4 piston calipers....

radial mount:

1.38", 1.25" and 1.00" bores available....for rotors .35/.50 and .79/.85 thick...diameter 10.25 to 11.00"....

pretty cheap at $150 each (forged as well)

thanks for the numbers Paul....

Brett W	Jan 27 2005, 10:09 PM Post #5
Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None	How about a bolt on 4 piston brake upgrade with an .810 vented rotor with a floating rotor, studded hubs all for less than 400$. You will need a bigger master though. Should know something in the next week or so.

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