I'm feeling cheated because I spent all that money on a fancy Nitrogen fill and they didn't even give me any fancy green caps. I feel so used!

 

I knew we could make this a 4 pager!

Selo, you don't want green caps. It would clash with your 911.

 

I've seen the machine that sucks the air from the tires then replaces the "empty space" with nitrogen... While it's sucking, the tire curls into the inside like a crushed soda can...

the question that I had in my head was doesn't that affect the structure of the tire in a bad way??!!

 

Not sure, but our (some of us) Porsche space saver spares, do this with no ill effects. It's pretty cool, actually.

 

Tires can withstand going 180mph and corner at +1g. I think it can handle a little bit of curl.

 

 

I have some green caps I can send you. Expect about a 10 Hp gain but they do weigh more.

When my dealer performed this they didin't draw down the tires that much, they still had their original shape during the entire procedure.

 

So now that the world's problems with tire interiors can be solved with N2 on the inside, how do we solve the REAL issue of rubber aging on the outside surface of the tire? Actually UV and O3 are much more of an issue than O2 on the inside. Oh, I forgot.... all of these issues have been addressed successfully many, many years ago through rubber compound development.

 

hattawi, great pics. fahrer, go back to your efforts on world peace.

 

hattawi, are those tires Pirelli Trofeo? Do you track them?

 

These trofeos are not my tires but for another fellow rennlister.. I think I have some sanity left not to crush my tires like this for the sake of nitrogen...

https://rennlist.com/forums/997-gt2-...-must-see.html

am not sure but I think the shred might have been caused by this procedure...

and yes I have the trofeos, amazing grip but you have to get the pressure as low as 2.0 bar. They warm up pretty fast also.. the only problem with them is the high price and the low tread life... so far 2.5 track days with half tread remaining... no street use...

 

How many used cars have you seen with corroded wheels due to type of gas used to fill the tires and tires that have been eaten away from the inside by air?

 

This topic is similar to the oil debates... Ah, the fun.

I am seriously considering Nitrogen for my cars for three reasons:

1) my CPOd 997.1 came with the pretty "green" caps. I have noticed minimal loss in tire pressure on my CPOd 997 after 5000 miles (including a very, VERY spirited "fun run" on the Tail of the Dragon with fellow Rennlisters from the 997 GT3 board back in May) when compared to air...

2) my Speedster seems to dry-rot tires from the inside every 3-4 years with minimal mileage (less than 400 miles per year), and has done so three times across brands. The car rarely sees sun, and is in essence a stored vehicle. I am concerned that O2 on the inside is the core issue as UV rays and external heat are not a factor. I live in a high desert climate, so humidity is a non-issue.

3) gas mileage... I understand that F1 and racing teams use nitrogen to cut down on the variable of tire inflation. For DDs, this would manifest itself in gas mileage (proper tire inflation).

Costco will "fill" nitrogen tires for free. A call to three different Costcos in Salt Lake City this morning confirmed that "retrofitting" tires with nitrogen is up to the manager's discretion. They prefer to sell you the tires with the nitrogen.

Still unsure what to do... I have an awesome air compressor at my track garage, and a portable one at the home garage - so clearly that is preferred.

I was hoping to learn that Nitrogen is 10X better - rather than 1.2x better per this thread... More data would be helpful

-Blake

 

"There is a sucker born every minute"

P.T. Barnum

 

I'm happy with the stock 70% nitrogen fill that comes with the car... its easier for me to maintain at home anyway.