Jump to content
SAU Community

Recommended Posts

Yuh, but if you have to pay anything for it, you are being ripped off.

Both N2 and O2 are as near as damnit ideal gases. Together they make up more than 99% of typical air. The majority of the remainder is water vapour, which is less of an ideal gas. The difference in behaviour between air filled tyres and N2 filled tyres is really small. Justified in racing classes or in supercars perhaps, but hardly justified in normal cars - even super duper hot wheels brrrrm brrrm vrrmpsh like Skylines.

Nitrogen has a lower coefficient of expansion than air, so the pressure inside the tyre doesn't change as much as it heats and cools. SFA difference on the street. On the track i guess it means you can start cold with a little more pressure, so your cold tyres aren't as mushy as they come up to temp.

If you do put it in and you're somewhat disappointed at the result, try sitting on the ground with your legs either side of the tyre and push the valve right in: you might get a laugh out of it :)

lol wut?

Can't hurt, it just means you get less affected by changes in tire heat

not tru

during many race seasons i had a driver who insisted on nitrogen. so we abliged, the pressure change was markedly higher than air from a compressor.

the ONLY advantage is being able to have repeatable results. having the same air in the tyre each race. it alows for a quicker set up being able to predict a pressure for a given tyre temp. humidity is the factor with normal compressed air. since the atmosphere is 78% nitrogen anyway.

but the fact remains the pressure would raise more with n2.

if anyone has some hard data to sugest otherwise. ie: go out 30 psi with a ambiant tyre temp and come in with 30 psi with a 90 deg c tyre i will donate a leg..

n2 in a road car is the biggest WANK ever. and a complete waste of time. and the n2 has to be from a bottle. and to remove any moisture from the air in the tyre already is imposible. mayby if it was filled and deflated and vacumed 100 times you might get 100%n2 in there.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Ok I get you. But isn’t the butterfly intake a headache with the +T?  see this is my plan so far but please advise me into the right direction.  Nistune Ecu, 1000cc Bosch injectors, TD05 or TD06 Kinugawa turbo using stock rb25det exhuast manifold, walbro fuel pump unsure of model I think it’s 450/460, spitfire coils and sparks to suit and a R35 MAF sensor and boost sensor.    I was thinking maybe do a cheap eBay plenum $400-500 or try find a stock det neo intake. I think I’d port match it so it’s getting the full capacity but open to advice please.  Thanks 
    • The issue now is the 'fuel cut' while driving, and when it happend, it does not stall. This, I did not test the fuel pressure while driving as I cannot with a fuel pressure gauge. I do have Nistune logs, yes. I have also replaced the MAF Sensor.   Also related to the FPG Fuel Hanger – I just realized that I need a Deutsch Crimp Tool to crimp some cables for the FPG Fuel Hanger. Need to purchase additional cables as the kit only included 2, which are for the float. FPG has not responded to my emails so far since purchasing. I thought about taking it to someone and having it done professionally, but I am reluctant since everyone I took it to messed up in some way.  
    • There's a good German place in Brisbane if youre up for the drive 😛
    • The German place in Cabramatta was rock solid, fresh pretzel cooked to order back then. Then it went all quiet, after all the poker machines were removed, then I believe it closed for good. I did drive past the other week and noticed outdoor lighting a big screen, but no idea what is there now.  
    • Yeah I suspect even if you hold airmass per cycle/cylinder constant if you get too far away from stock you're still going to have problems running the factory tune within the bounds of the factory load scale. Cams, different displacement/rod ratio, etc. I'm just lucky that the GTIII-SS with wastegate boost + CA compliance cats is pretty much equivalent to stock turbos. When I have actual space I can finally get it tuned and modify the fuel system for flex fuel to 100% handle any detonation concerns when cranking the boost to whatever those dinky turbos can put out.
×
×
  • Create New...