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| D2 - Wheels and Tyres Refurbing, center caps, tyre brands, tyrefitters - discuss it here |
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#11
9th April 2011, 09:55 PM
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I use nitrogen, I have noticed the fuel economy is better. Makes a difference in my trade. Not so sure it would be that useful for vehicles that aren't used frequently.
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 07 Silver D3 A/S8L Quattro  S8 front end, Xenons, Bose, Bluetooth, Voice Control, Autodim mirrors, Heated folding mirrors, Double Glazed Windows, Electric Rear & Side Blinds, Black leather Comfort Seats with front memory seats & mirrors, Front & rear heated seats, Interior/Exterior light pack, TV.I.M, AMI, Parking sensors Front & Rear, Air suspension (soon to be lowered), Keyless entry & Start/Stop, 4 zone climate control, Power Boot Open/Close.
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#12
9th April 2011, 10:43 PM
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Quote:
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Confidence is the feeling you have before you know better . . . .  Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 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  Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
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#13
10th April 2011, 06:37 AM
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Quote:
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Audi S8 Phantom Black
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#14
10th April 2011, 08:56 AM
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I got Kwikfit to put Nitrogen in my tyres a while back - it seemed to give a small but definite benefit to ride and economy, but I notice it less now (either because I take it for granted, or because I was imagining it!!)
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#15
10th April 2011, 01:16 PM
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I just want to check if the numbers look right.
As per wikipedia, Nitrogen density = 1.251g/L Air is 78% Nitrogen, 21% Air, 1% Argon, average density = 1.294g/L I dont know if my calculation is right, a 245/45 18" tyre at 35psi holds 93l of air. So, the weight of air in a tyre vs weight of Nitrogen in a tyre is: Air = 93x1.294 = 120g Nitrogen = 93x1.251 = 116g Weight saved = 4g. but, because rotating mass is like saving 2.5x static mass, thats a saving of 10g. I doubt anyone would feel that.
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#16
20th April 2011, 09:41 PM
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I'm uncertain running on curry emissions is better than nitrogen. Unless you're using is a fuel
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#17
22nd April 2011, 11:18 AM
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im defintaely going to give this stuff a go when my drift car is back on the road.
when i say the back tyres get too hot to touch im not making it up you cant touch the wheel as you will burn your hand its that hot. i know the nitrogen wont cure the heat on tyre and wheel, but it will stop my wheels going to like 70-80psi during drifting
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#18
29th April 2011, 03:31 PM
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Would the tyre pressures be the same as manufacturers spec when using nitrogen?
Also is there a different pressure required for faster driving, how's this affected by nitrogen or vice versa? £1 per tyre here at ATS
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I Love the smell of petrol in the morning! Other vehicles 1968 Rover P5B Coupe (Modified & V-Quick, but I have to sell this now  ... Boo Hoo!)'92 Mitsubishi Pajero V6 (Petrol) Super Exceed (Gone now) '06 Harley Davidson Night Train Oh Yes....... The '98 PF S8!
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#19
7th May 2011, 07:42 PM
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Tristar Worldwide Chauffeur services use it in all their cars.
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#20
10th May 2011, 09:23 AM
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FWIW, aircraft (well, large ones anyway) only use nitrogen for tyre inflation.
I think the reason is that N expands less when heated, thus the tp stays constant after very heavy usage. Aircraft wheels/ tyres get very hot and 'work' extremely hard. The tyres wear out quickly and get changed frequently. It's not to do with leaking through the tyre (or elsewhere) because the pressure is checked and adjusted daily. It might be because Nitrogen is 'drier' than air. Air's always got water in it. I'll ask an engineer. 
Last edited by Simon Wallwork; 10th May 2011 at 09:27 AM.
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