Good day,

Many of you have read my woes with having a vibration in the forward portion of the vehicle that I could feel under me and also slightly at the steering wheel. When I had my LIM and valve gaskets replaced last week I mentioned this to the shop and they took a look at it. When I got the car back they said that they filled the tires with nitrogen since they could not determine any other mechanical issue, and that helped solve the issue.

Well, after having driven the car for a few days now, I am telling you that it works! The vibration is not noticeable now.

Does anyone know why this would work?

nitogen offers a more uniform volume? magic? or is it all in my imagination?

Thanks.

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2009 G8 GT -Sport and Premium Pkgs, Roto-Fab CAI, Cortex 93 Octane Tune, Billet Prototype Catch Can, BMR Front and Rear Sways, BMR RTAs, BMR Rear Cradle Bushings, BMR Steering Rack Bushing, GXP SW......and much more to come.

I know physics!!!!! Or at least my transcript says I do.
The reason nitrogen is used (you can notice cars filled with nitrogen because they have green valve stem covers) for a couple reasons. The main reason is that the nitrogen molecule is larger than an oxygen molecule, therefore, the tire will lose less air over time due to the nitrogen molecules being unable to fit through the small little pores and such that rubber, the bead, metal have. Also, nitrogen has better temperature qualities than regular "air". When it is heated, it expands less (hence why you're supposed to take tire pressure when the tires are cold), therefore the change in PSI is usually less with nitrogen, hence why many race cars are filled with nitrogen instead of atmospheric air because a 1 PSI change for them could mean 1st and second especially in F1.

Other than that, I have no idea.

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

Magic f*cking unicorns!

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I knew it had something to do with magic frickin Unicorns! bless them!

Anyway - thank for the physics Matt. But what I still do not understand is why this helped reduce the vibration? My only guess is that there is an issue with one or more of my tires which caused the vibration and perhaps over time one tire lost air and then the vibration started.

Now with the nitrogen, that loss of air is less likely and has not occured. Or maybe I have a bent rim and now with the nitrogen the loss of air is less over time?


Thanks

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2009 G8 GT -Sport and Premium Pkgs, Roto-Fab CAI, Cortex 93 Octane Tune, Billet Prototype Catch Can, BMR Front and Rear Sways, BMR RTAs, BMR Rear Cradle Bushings, BMR Steering Rack Bushing, GXP SW......and much more to come.

I doubt the nitrogen stopped any shaking.....Maybe you had a loose lug nut

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2001 GT-Blue, Comp G Wheels, 2.5'' DP, Home Depot Intake, 180*T, GMPP Sways

I agree with you, but it may be masking another tire issue.

I wish those magic unicorns would fix my alterator!

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2009 G8 GT -Sport and Premium Pkgs, Roto-Fab CAI, Cortex 93 Octane Tune, Billet Prototype Catch Can, BMR Front and Rear Sways, BMR RTAs, BMR Rear Cradle Bushings, BMR Steering Rack Bushing, GXP SW......and much more to come.