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D3 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc.

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  #1  
Old 12th May 2018, 07:28 AM
North2007 North2007 is offline
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Default Upgrade Brakes?

Team, Im looking to improve my pedal sensitivity. I dont believe my brake have a fault, just the automatic gearbox and overall design. After driving my sons A3 the A8 pedal softness is very obvious. Is there any merit in upgraging the servo or are all the 8s same? Or maybe swapping out the rubber flexi pipes to help improve the lack of sharpness? Im no expert, and would like to hear your thoughts/ experiences. Steve
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Old 12th May 2018, 07:42 AM
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Rubber flexi pipes is a good start and is cheap. It made a significant difference on my Passat as they must have been ballooning but I have only done the rears on the A8 so far which didn't make any difference.
They do get a bit soft with age and only about 7 each, but lots of part number variation, so be really sure you get the right length for your model/year.
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Old 12th May 2018, 09:02 AM
North2007 North2007 is offline
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I was thinking braided stainless steel
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Old 12th May 2018, 10:28 AM
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I would also change your whole brake fluid for new first before you do anything else and re-bleed. you are supposed to change it every 2-3 years as the properties lessen for best performance as it gets older and it may also make a difference to how the pedal feels
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Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble
Next - Clean Car, Phantom Aeriel, Clean Car again, Fit Variable Back Box with remote control on/off Loudness, RNS-e, Clean Car again!
Audi A8L D3 4.2 Petrol with LPG - Oyster Grey
and some other A8's A8L's and Mercs
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Old 12th May 2018, 12:42 PM
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Quote:
Originally Posted by Architex_mA8tey View Post
I would also change your whole brake fluid for new first before you do anything else and re-bleed. you are supposed to change it every 2-3 years as the properties lessen for best performance as it gets older and it may also make a difference to how the pedal feels
Ever so slightly OT Neil, but do you notice a big difference in the braking between the D2 and D3? I changed my brake fluid on the D2 last month prior to the MOT and expected it to feel a bit sharper, but didn't notice anything. The brakes were obviously okay as the car sailed through the MOT. Maybe I'm not driving fast enough to notice.

Just wondering if doing what North2007 suggests would help, with the braided stainless. Would also look better.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts

My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts

2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:L--- Suzuka Grey, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights

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Old 14th May 2018, 10:29 AM
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Quote:
Originally Posted by steamship View Post
Ever so slightly OT Neil, but do you notice a big difference in the braking between the D2 and D3? I changed my brake fluid on the D2 last month prior to the MOT and expected it to feel a bit sharper, but didn't notice anything. The brakes were obviously okay as the car sailed through the MOT. Maybe I'm not driving fast enough to notice.
Its hard to say now really Sean, as I have upgraded the standard D2 brakes on mine to W12/S8/Bentley Big Boy brakes, I can definitely say that they are better than the standard D3 brakes!
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Confidence is the feeling you have before you know better . . . .
Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble
Next - Clean Car, Phantom Aeriel, Clean Car again, Fit Variable Back Box with remote control on/off Loudness, RNS-e, Clean Car again!
Audi A8L D3 4.2 Petrol with LPG - Oyster Grey
and some other A8's A8L's and Mercs
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Old 14th May 2018, 12:47 PM
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Quote:
Originally Posted by Architex_mA8tey View Post
Its hard to say now really Sean, as I have upgraded the standard D2 brakes on mine to W12/S8/Bentley Big Boy brakes, I can definitely say that they are better than the standard D3 brakes!
I forgot you had those monsters on the D2.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts

My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts

2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:L--- Suzuka Grey, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights

My DIY jobs - Fan Jet Windscreen Washers
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