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  #1  
Old 17th September 2014, 07:21 AM
RallyQuattro RallyQuattro is offline
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Default Better water cooler for 600+hp ?
I need a better water cooler for my Audi S8-97 with RS6 engine.

After 6 hard laps at the track the water temperature is 115-120 degrees Celsius.

Does anyone know if there is a A8/S8 cooler that cools better than the OEM cooler?

My radiator has dimensions:
Height [mm] 720
Width [mm] 440
Thickness [mm.] 43

4D0 121 251 F
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Owns at the moment:
S8-97 biturbo = RS8 My new trackday car
A8-94, A8-96, A6 1.8tq -2004
2 Urquattro 20v-90 one red, one blue,
and one old Urquattro ex rallycar,

and some other cars..



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  #2  
Old 17th September 2014, 08:59 AM
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Delboy Delboy is offline
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Quote:
Originally Posted by RallyQuattro View Post
I need a better water cooler for my Audi S8-97 with RS6 engine.

After 6 hard laps at the track the water temperature is 115-120 degrees Celsius.

Does anyone know if there is a A8/S8 cooler that cools better than the OEM cooler?

My radiator has dimensions:
Height [mm] 720
Width [mm] 440
Thickness [mm.] 43

4D0 121 251 F
I don't have the factory fitted answer for you but have you considered a custom rad?

Btw that's an amazing car, love the stance sitting on them slicks.
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  #3  
Old 17th September 2014, 10:37 AM
PsYcHe PsYcHe is offline
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I'd say you'd be better looking at custom cooling, more expensive, but you'll probably get much better results.
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  #4  
Old 17th September 2014, 11:14 AM
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IT IT is offline
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If you're thinking oem Look for kit designed for 'hot country' cars - they have uprated cooling systems to cope with the hot weather, but also have the benefit of improved cooling in cool climates.

The UK C5 RS6 Plus for example had the 'hot country' build code to give it more cooling to cope with the extra power....


Also consider looking at kit for the D2 W12, I'm sure its cooling would be superior.
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The Daily Town Car - 2023 Tesla Model Y Performance. Black with Black. Giant ipad screen, huge sunroof, 4 wheel drive, Tow bar, lots of ooomph and made in China, so actually built properly unlike the Californian ones.

The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff......

The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous.....

The First 20 Audis:

2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,

The Second 20 Audis:

2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black , 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black

Most Recent Audis:

2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8

Everything Else

1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance
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  #5  
Old 17th September 2014, 04:44 PM
andycaca andycaca is offline
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first thing to consider, if you havent already, is a massive thermostatic oil cooler. turbo's cars really abuse the oil and it gets superheated.

my track car has nearly 500bhp and without a big oil cooler it does the same as yours...
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  #6  
Old 18th September 2014, 07:32 AM
RallyQuattro RallyQuattro is offline
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RS6 oem water cooler is smaller than my S8 cooler and for RS6 hot climate then they have 2 extra small water coolers behind IC's.

I can't find any size on the w12 cooler? part no: 4D0121251AJ


I have a BIG oil cooler:
Cooling Row Quanity: 45.00
Depth (inch): 1.5
Height (inch): 13
Width (inch): 11.5
http://www.bmracing.com/products/702...k/?query=70274
__________________
Owns at the moment:
S8-97 biturbo = RS8 My new trackday car
A8-94, A8-96, A6 1.8tq -2004
2 Urquattro 20v-90 one red, one blue,
and one old Urquattro ex rallycar,

and some other cars..



Last edited by RallyQuattro; 18th September 2014 at 07:48 AM.
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  #7  
Old 18th September 2014, 07:33 AM
RallyQuattro RallyQuattro is offline
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Join Date: May 2012
Location: Sweden
Posts: 80
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Who can produce a custom cooler for me?


.
__________________
Owns at the moment:
S8-97 biturbo = RS8 My new trackday car
A8-94, A8-96, A6 1.8tq -2004
2 Urquattro 20v-90 one red, one blue,
and one old Urquattro ex rallycar,

and some other cars..



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  #8  
Old 18th September 2014, 08:30 AM
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IT IT is offline
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Location: Harrogate, North Yorkshire
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Quote:
Originally Posted by RallyQuattro View Post
RS6 oem water cooler is smaller than my S8 cooler and for RS6 hot climate then they have 2 extra small water coolers behind IC's.

I can't find any size on the w12 cooler? part no: 4D0121251AJ


I have a BIG oil cooler:
Cooling Row Quanity: 45.00
Depth (inch): 1.5
Height (inch): 13
Width (inch): 11.5
http://www.bmracing.com/products/702...k/?query=70274
A8parts have one on the shelf, you could try asking them:

http://www.ebay.co.uk/itm/191136232719
__________________
For parts enquiries and Forum User Administration please contact customer services directly, not me - enquiry@a8parts.co.uk, www.a8parts.co.uk, or call 01642 783537

The Daily Town Car - 2023 Tesla Model Y Performance. Black with Black. Giant ipad screen, huge sunroof, 4 wheel drive, Tow bar, lots of ooomph and made in China, so actually built properly unlike the Californian ones.

The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff......

The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous.....

The First 20 Audis:

2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,

The Second 20 Audis:

2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black , 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black

Most Recent Audis:

2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8

Everything Else

1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance
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  #9  
Old 18th September 2014, 08:49 AM
RallyQuattro RallyQuattro is offline
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But that one is 4D0 121 251 AG ?

And I found this measurements on AG

650*358*32

That is smaller than mine?

I have 720*440*43
__________________
Owns at the moment:
S8-97 biturbo = RS8 My new trackday car
A8-94, A8-96, A6 1.8tq -2004
2 Urquattro 20v-90 one red, one blue,
and one old Urquattro ex rallycar,

and some other cars..



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  #10  
Old 18th September 2014, 04:19 PM
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thebluewhale thebluewhale is offline
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Quote:
Originally Posted by RallyQuattro View Post
Who can produce a custom cooler for me?


.
Try these:

http://www.allisport.com/content/per...charge-coolers

Supposed to be very good at what they do and can make pretty much any size you need.
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