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crash7
Nürburgring
Joined: 28 May 2011
Posts: 440
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 Posted: Thu Jan 18, 2018 11:42 pm Post subject: Charging Dampers with Nitrogen - Where?
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Does anyone know anywhere, the closer to Berkshire the better, that has the ability to add nitrogen to remote damper canisters?
Cheers
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Cunno
Watkins Glen
Joined: 13 Dec 2008
Posts: 2225
Location: Nottinghamshire
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| Posted: Fri Jan 19, 2018 10:41 am Post subject:
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Simon Joy
AST & MOTON SUSPENSION UK
Unit 4 Unicorn Business Park,
Whitby Road,
Brislington,
Bristol
BS4 4EX
These guys should be able to help
_________________
Porsche is for driving not for washing.
Present Car: 2006 3.6 Porsche GT3 997(White)
Ex: 2006 3.4 Porsche Cayman S (Silver)
Ex: 2001 2.7 Porsche Boxster (Seal Grey)
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DynoMike
Barcelona
Joined: 25 May 2012
Posts: 1430
Location: The Cotswolds
2003 Porsche 996 Turbo
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| Posted: Fri Jan 19, 2018 6:56 pm Post subject:
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Or Patrick Murphy at Quantum Racing Services, in Sussex.
01798 875199
Great people with superb products.
_________________
2003 996 Turbo
Previous toy 1974 Mini 1000
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NXI20
Paul Ricard
Joined: 02 Feb 2008
Posts: 3313
Location: South Bucks
2004 Porsche 996 GT3 Mk2
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| Posted: Sat Jan 20, 2018 8:07 pm Post subject:
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Or anyone with a nitrogen bottle, a 10 bar regulator & a Schrader valve adapter 
That'll be me in about 3 weeks 
_________________
Nick
2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue 
1978 Carrera SC Barn Find in Red (restoration project)
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NXI20
Paul Ricard
Joined: 02 Feb 2008
Posts: 3313
Location: South Bucks
2004 Porsche 996 GT3 Mk2
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| Posted: Wed Feb 14, 2018 8:31 am Post subject:
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OP, if you (or anyone else) wants to check / recharge their remote canisters with nitrogen, I now have all the kit required.
It's not really portable, so a visit to my place near J3 of the M40 would be required.
No charge for 911UK members 
_________________
Nick
2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue
1978 Carrera SC Barn Find in Red (restoration project)
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crash7
Nürburgring
Joined: 28 May 2011
Posts: 440
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| Posted: Wed Feb 14, 2018 11:27 am Post subject:
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NXI - A very generous offer - Thank you Sir!
A question if I may, who do you use to corner weight and geo your track car?
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NXI20
Paul Ricard
Joined: 02 Feb 2008
Posts: 3313
Location: South Bucks
2004 Porsche 996 GT3 Mk2
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| Posted: Wed Feb 14, 2018 11:34 am Post subject:
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| crash7 wrote: | NXI - A very generous offer - Thank you Sir!
A question if I may, who do you use to corner weight and geo your track car? |
My goto geo people are Center Gravity, although now that I know what settings suit me / the car / slicks, I have also used Fearnsport for convenience if the car is in there for other works. Fortunately, the geo doesn't drift much over a season unless the monoballs have worn or I've been a bit too aggressive on the kerbs!
_________________
Nick
2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue
1978 Carrera SC Barn Find in Red (restoration project)
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crash7
Nürburgring
Joined: 28 May 2011
Posts: 440
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| Posted: Wed Feb 14, 2018 12:37 pm Post subject:
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Cheers, I only wish CG was further South! I head up next month, although did consider Fern & Parr but struggled to get info from them.
CG cannot check can pressures hence my initial request, although they have mentioned an alternative possibility, if that fails I may be in contact with cap in hand!
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LaSource
Nürburgring
Joined: 08 Feb 2009
Posts: 435
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| Posted: Wed Feb 14, 2018 1:12 pm Post subject:
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Is there any proprietary magic to how much gas is filled or is it relatively straight forward and standard pressures?
_________________
997 GT3 RS 3.8 Grey/Red
996 GT3 Mk2 Clubsport Guards Red
KTM XBOW RR Superlight Spec
BMW E39 M5, BMW E46 M3
Land Rover Discovery 4 HSE
Previous:
981 GT4 3.8 Clubsport
2x 997 GT3 RS 4.0 White and White
2x 997 GT3 RS 3.8 RHD and LHD
2x 996 GT3 RS Blue and Red
2x 996 GT3 Mk2 Clubsport and Comfort
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crash7
Nürburgring
Joined: 28 May 2011
Posts: 440
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| Posted: Wed Feb 14, 2018 1:23 pm Post subject:
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No magic, standard valve and you fill based on pressure.
I run JRZ and they recommend starting at 250 psi, the operating range is 150 - 350psi dependent on your taste!
Other manufacturers may recommend different pressures.
If you mountain bike its exactly the same as a rear shock, which operate at similar pressures and you fill these with a hand pump! - Which in principle would work for my JRZ's however fresh air is only 80% nitrogen.
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NXI20
Paul Ricard
Joined: 02 Feb 2008
Posts: 3313
Location: South Bucks
2004 Porsche 996 GT3 Mk2
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| Posted: Wed Feb 14, 2018 1:57 pm Post subject:
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It very much depends on what it is that you require the gas pressure to do. Beyond around 100psi, it acts as a spring, increasing bump resistance. You need a certain amount of pressure to prevent cavitation of the oil. Running 350psi on anything but a race car is far too high & will result in a bone-jarring ride with zero compliance. As usual, the Americans tend to assume that everyone is driving on very smooth surfaces & their advice doesn't travel over the Atlantic that well. Look at the sort of spring rates they routinely recommend by way of illustration.
My Moton canisters only require 10 bar of pressure (around 150psi) so I'm not really equipped to go beyond this. I can measure up to 12 bar to within 0.1 bar with what I have. Measuring pressure up to 25 bar accurately tends to require very expensive equipment.
_________________
Nick
2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue
1978 Carrera SC Barn Find in Red (restoration project)
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LaSource
Nürburgring
Joined: 08 Feb 2009
Posts: 435
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| Posted: Wed Feb 14, 2018 2:06 pm Post subject:
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What kind of pressure do you think is standard in a Nitron Race V3 kit with remote canisters?
_________________
997 GT3 RS 3.8 Grey/Red
996 GT3 Mk2 Clubsport Guards Red
KTM XBOW RR Superlight Spec
BMW E39 M5, BMW E46 M3
Land Rover Discovery 4 HSE
Previous:
981 GT4 3.8 Clubsport
2x 997 GT3 RS 4.0 White and White
2x 997 GT3 RS 3.8 RHD and LHD
2x 996 GT3 RS Blue and Red
2x 996 GT3 Mk2 Clubsport and Comfort
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NXI20
Paul Ricard
Joined: 02 Feb 2008
Posts: 3313
Location: South Bucks
2004 Porsche 996 GT3 Mk2
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| Posted: Wed Feb 14, 2018 2:08 pm Post subject:
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No idea. Ask Nitron?
_________________
Nick
2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue
1978 Carrera SC Barn Find in Red (restoration project)
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crash7
Nürburgring
Joined: 28 May 2011
Posts: 440
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| Posted: Wed Feb 14, 2018 2:27 pm Post subject:
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NXI, you comments on American recommendations strike a chord!
While I am leaching info from you  can you confirm what spring rates you run? And the track/road percentage split of the car.
And in addition assuming the usage of 90% Track / 10% Road (As in driving to the track ) - What would you recommend?
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NXI20
Paul Ricard
Joined: 02 Feb 2008
Posts: 3313
Location: South Bucks
2004 Porsche 996 GT3 Mk2
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| Posted: Wed Feb 14, 2018 3:04 pm Post subject:
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| crash7 wrote: | NXI, you comments on American recommendations strike a chord!
While I am leaching info from you can you confirm what spring rates you run? And the track/road percentage split of the car.
And in addition assuming the usage of 90% Track / 10% Road (As in driving to the track ) - What would you recommend? |
80n/mm front
140n/mm rear
It's really only used as a track car now & rarely does journeys unconnected with its purpose or maintenance - it still did about 12k miles last year though
As I do quite a few foreign trackdays per year, it does rack up the road miles so I'd have thought it's at least 60/40 in favour of road miles.
The ride is, erm, firm but it's not actually all that bad if you set the bump & rebound virtually to the minimum of their range. It's going to be a trade-off on a road car but after trying harder springs on the front, I would say don't go too hard. What I have now is roughly 50% stiffer than standard at each end, along with similarly stiffer ARBs which are also run at their stiffest setting. The car corners pretty flat as a result and means I can run slightly softer springs & still use slicks & road tyres sensibly.
One illustration of the consequence of having too stiff a front spring on road tyres: at Oulton Park I would get into the ABS or lockup coming into Lodge where it's quite bumpy in the braking zone; dropping the rate by 20% cured that completely. It didn't happen on slicks at all...
_________________
Nick
2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue
1978 Carrera SC Barn Find in Red (restoration project)
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crash7
Nürburgring
Joined: 28 May 2011
Posts: 440
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| Posted: Wed Feb 14, 2018 4:18 pm Post subject:
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Thanks again
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