Brake Upgrade, Seriously Considering It, Here's the System, Will Need Others
10-18-2002, 11:49 AM
#11
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Stasis..see Paul's response on life expectancy
I am considering a brake upgrade as well this summer, Stasis seems to be a good solution. When asked about the life expectancy of his system he replied:
Tom,
Our A8 kit uses an OEM S8 Caliper and S8 rotor. You can expect the same performance, ease of service and longevity as provided by a factory S8.
Brake longevity is very much dependant on the type of use. We would expect to see 50k miles on an A4 Track Sport rotor and pad set used in regular street driving. This same brake system on our WC Touring Car gets four race weekends on a set of pads and eight weekends on a set of rotors.
Most importantly, we use standardized rotor sizes for all of our kits. While we expect to provide the most competitively priced replacement rotors/pads, you have a choice of several competitive sources.
Paul
STASIS Engineering
www.stasisengineering.com
1-888-9-STASIS<ul><li><a href="http://www.stasisengineering.com">http://www.stasisengineering.com</a</li></ul>
Tom,
Our A8 kit uses an OEM S8 Caliper and S8 rotor. You can expect the same performance, ease of service and longevity as provided by a factory S8.
Brake longevity is very much dependant on the type of use. We would expect to see 50k miles on an A4 Track Sport rotor and pad set used in regular street driving. This same brake system on our WC Touring Car gets four race weekends on a set of pads and eight weekends on a set of rotors.
Most importantly, we use standardized rotor sizes for all of our kits. While we expect to provide the most competitively priced replacement rotors/pads, you have a choice of several competitive sources.
Paul
STASIS Engineering
www.stasisengineering.com
1-888-9-STASIS<ul><li><a href="http://www.stasisengineering.com">http://www.stasisengineering.com</a</li></ul>
10-18-2002, 11:51 AM
#12
AudiWorld Super User
Thread Starter
Here's the info for the 97-99, 00 and newer and S8
From the Bently, I don't know what the 15"/16" means?
Front brakes
Brake caliper
FN-3 15"/16" - 97-99
HP 2 (15"/ 16") - 00 and newer
Brembo (17") - S8 brakes
Brake disk vented
Diameter in mm
288/ 312
314 or 323
345
Brake disk, thickness
mm
25
30
30
Brake disk, wear limit
mm
23
28
28
Brake caliper, pistons
Diameter in mm
57
42.8
40.0, 46.0
Brake pad thickness including backing plate
mm
19
17
17
Wear limit including backing plate
mm
7
7
7
Front brakes
Brake caliper
FN-3 15"/16" - 97-99
HP 2 (15"/ 16") - 00 and newer
Brembo (17") - S8 brakes
Brake disk vented
Diameter in mm
288/ 312
314 or 323
345
Brake disk, thickness
mm
25
30
30
Brake disk, wear limit
mm
23
28
28
Brake caliper, pistons
Diameter in mm
57
42.8
40.0, 46.0
Brake pad thickness including backing plate
mm
19
17
17
Wear limit including backing plate
mm
7
7
7
10-18-2002, 01:34 PM
#15
AudiWorld Super User
Thread Starter
The picture does not show an OEM S8 rotor I believe
Do you see the description and the air vents? I've never seen an OEM rotor, can somebody state if these are S8 rotors?
Thanks.
Paul
Thanks.
Paul
10-18-2002, 04:47 PM
#17
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Correct, also the OEM S8 rotor is one-piece, and ...
.
VERY heavy.
The 345x30 mm S8 OEM S8 rotor is 10 lb heavier per corner than my 2-piece 355x32 mm Alcon rotor with an aluminum hat.
In the rear, I'm going to switch from the one-piece 280x22 mm OEM rotor to the 298x20 mm Stasis rear rotor, but only for the weight savings ... ~5 lb/corner in the rear.
VERY heavy.
The 345x30 mm S8 OEM S8 rotor is 10 lb heavier per corner than my 2-piece 355x32 mm Alcon rotor with an aluminum hat.
In the rear, I'm going to switch from the one-piece 280x22 mm OEM rotor to the 298x20 mm Stasis rear rotor, but only for the weight savings ... ~5 lb/corner in the rear.
10-18-2002, 04:59 PM
#18
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First Class !!
.
at a great price, with the added benefit that this fits under 17" wheels.
The only other thing you'll need for the track is pads. I'd recommend either the Pagid RS 14 or a Ferodo DS3000.
at a great price, with the added benefit that this fits under 17" wheels.
The only other thing you'll need for the track is pads. I'd recommend either the Pagid RS 14 or a Ferodo DS3000.
10-18-2002, 05:09 PM
#19
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Rears will be OK ...
.
Depending on caliper piston diameters, even though upgrading the front brakes usually does shift the brake bias to the front, anyone upgrading the brakes has almost certainly also upgraded to max performance tires. The brake upgrade only helps prevent fade, and the better stopping power from the tires results in more weight transfer to the front under max effort braking, which reduces the percentage of braking done at the rear.
Having said that, though, the rears also get a real work-out on the track. I came in from one session and noticed that the rear rotors had turned blue; and you'll need a pad that can handle the heat to prevent the rear brakes from fading.
Depending on caliper piston diameters, even though upgrading the front brakes usually does shift the brake bias to the front, anyone upgrading the brakes has almost certainly also upgraded to max performance tires. The brake upgrade only helps prevent fade, and the better stopping power from the tires results in more weight transfer to the front under max effort braking, which reduces the percentage of braking done at the rear.
Having said that, though, the rears also get a real work-out on the track. I came in from one session and noticed that the rear rotors had turned blue; and you'll need a pad that can handle the heat to prevent the rear brakes from fading.
10-18-2002, 05:22 PM
#20
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Re: caliper piston diameter ...
.
some of these values seem strange.
FWIW, this is what I measured on my '01 S8
Front OEM 4-pot Brembo -- 40.5 and 40.5 mm
Rear OEM HP 2 -- 43 mm
And the 6-pot TA6 Alcon -- 41, 35, and 30 mm
You can calculate the affect on brake bias by comparing the total area of the pistons, and also the centerpoint of the radius of the swept area of the rotor if you also change rotor diameter.
some of these values seem strange.
FWIW, this is what I measured on my '01 S8
Front OEM 4-pot Brembo -- 40.5 and 40.5 mm
Rear OEM HP 2 -- 43 mm
And the 6-pot TA6 Alcon -- 41, 35, and 30 mm
You can calculate the affect on brake bias by comparing the total area of the pistons, and also the centerpoint of the radius of the swept area of the rotor if you also change rotor diameter.