Go Back   Team-BHP > Under the Hood > Technical Stuff


Closed Thread
 
Thread Tools Search this Thread
Old 10th March 2010, 15:53   #706
Senior - BHPian
 
khoj's Avatar
 
Join Date: Sep 2008
Location: Dilli
Posts: 2,722
Thanked: 1,253 Times
Default

Thanks rakowli,

I know that pump too they have some nice people there. Used to visit a client's office just opposite the pump/temple and they would let me park there even if parking space allocated to the client was already occupied.

My client has moved so I do not get to park there anymore especially when I visit the temple. But now that you are in the vicinity hmmm...

Will the one smiley do or should I add another one
khoj is offline  
Old 31st March 2010, 14:29   #707
Senior - BHPian
 
raj_5004's Avatar
 
Join Date: Jan 2008
Location: Dubai/Mumbai
Posts: 5,078
Thanked: 2,031 Times
Default

Hey guys, i have a query. i had recently filled nitrogen in my scorpio's tyres. mahindra recommends 32 psi for air. i filled 32 psi of nitrogen in all tyres. however, after that the ride quality became a bit harsh & stiff.

i spoke to a friend of mine who is apparently a professor & he said that since density of nitrogen is more than air, you should actually fill less of nitrogen as compared to air. is this true?

anyways, i just went to the tyre shop again thinking that i would reduce the pressure to 31 psi but the technician recommended me to reduce it to 30 psi stating that all scorpio owners fill 30 psi. i was a bit hesistant at first but recollecting what my friend had said, i asked him to reduce till 30 psi thinking that it will be equivalent to 31 psi of air. now the ride is back to normal & very comfortable.

is this okay or will this have any adverse effect on the tyres?
raj_5004 is offline  
Old 31st March 2010, 15:24   #708
Senior - BHPian
 
alpha1's Avatar
 
Join Date: Apr 2007
Location: P00NA
Posts: 1,626
Thanked: 967 Times
Default

Quote:
Originally Posted by raj_5004 View Post
Hey guys, i have a query. i had recently filled nitrogen in my scorpio's tyres. mahindra recommends 32 psi for air. i filled 32 psi of nitrogen in all tyres. however, after that the ride quality became a bit harsh & stiff.

i spoke to a friend of mine who is apparently a professor & he said that since density of nitrogen is more than air, you should actually fill less of nitrogen as compared to air. is this true?

anyways, i just went to the tyre shop again thinking that i would reduce the pressure to 31 psi but the technician recommended me to reduce it to 30 psi stating that all scorpio owners fill 30 psi. i was a bit hesistant at first but recollecting what my friend had said, i asked him to reduce till 30 psi thinking that it will be equivalent to 31 psi of air. now the ride is back to normal & very comfortable.

is this okay or will this have any adverse effect on the tyres?
Professor in Humanities? (No disrespect to any academic stream as such)
Even a science undergrad knows that 78% of air = nitrogen.
AND Nitrogen is LIGHTER than air, not heavier.

And gas being light or heavy has got nothing to do with pressure exerted on tyres. Pressure is pressure - you measure it in psi or pascals or kg/cm2 nothing to do with the constituents of the gas.

Now just to test the scientific temper of your friend - what pressure he recommends for nitrogen compared to air? And calculations for the same.



Practically speaking, I believe, in your case, you've just seen a perfect example of different calibrations (or non-calibrations) used by the gauge vendors.
alpha1 is offline  
Old 31st March 2010, 17:44   #709
BHPian
 
Join Date: Jun 2007
Location: Pune
Posts: 268
Thanked: 10 Times
Default

Its not nitrogen that matters, the correctness of the gauge matters.

Let me tell you my experience. I can see there are differences. When I fill it from fuel bunk is say 33 psi. But the fellow near to my house says its 30 psi. While I went to long drive of 900KM I felt tyre noise increased. So I got it checked on highway. That guy's gauge measured it 26. After topping up for 33 psi, on returning from tour, inital fuel bunk is showed 40 psi. So I settle at 35 psi of petrol bunk's gauge. I feel okay with this AIR pressure in tyre, smooth ride and less noisy.

I think nitrogen filling machines may be having more accurate gauges. And that could be the effect.
omishra is online now  
Old 31st March 2010, 18:00   #710
Senior - BHPian
 
raj_5004's Avatar
 
Join Date: Jan 2008
Location: Dubai/Mumbai
Posts: 5,078
Thanked: 2,031 Times
Default

@ alpha1: since i had my doubts regarding this, i posted it here.

@ omishra: now i am keeping my car's tyre pressure at 30 psi whereas the recommended pressure is 32 psi. so will it harm the tyre in any way?
raj_5004 is offline  
Old 31st March 2010, 19:18   #711
BHPian
 
Join Date: Jun 2007
Location: Pune
Posts: 268
Thanked: 10 Times
Default

Quote:
Originally Posted by raj_5004 View Post
@ omishra: now i am keeping my car's tyre pressure at 30 psi whereas the recommended pressure is 32 psi. so will it harm the tyre in any way?
For tyres, I do not see any issue by -2 psi for city ride. Naturally if larger tyre surface contacts with road then more friction it produces & it wears out fast. But not with a mere 2 psi difference.

Less pressure <90% of recommonded value affects surely affects. (tyre wear, fuel economy and ride experience by increased tyre noise.)

For highway, you will feel some pull while accelerating or unable keep speed on straight road. Keep +3 psi more for highway.
omishra is online now  
Old 31st March 2010, 21:48   #712
BHPian
 
iamback's Avatar
 
Join Date: Mar 2010
Location: Punekar
Posts: 126
Thanked: 8 Times
Default

If you have fitted NOS system in your car and if you need more NOS just connect a Pipe to the tyre and the NOS cylinder.
iamback is offline  
Old 1st April 2010, 09:32   #713
Senior - BHPian
 
raj_5004's Avatar
 
Join Date: Jan 2008
Location: Dubai/Mumbai
Posts: 5,078
Thanked: 2,031 Times
Default

but you cannot drive a car with a deflated tyre!!!
raj_5004 is offline  
Old 1st April 2010, 10:01   #714
BHPian
 
iamback's Avatar
 
Join Date: Mar 2010
Location: Punekar
Posts: 126
Thanked: 8 Times
Default

Quote:
Originally Posted by raj_5004 View Post
but you cannot drive a car with a deflated tyre!!!
It was a joke. Dude !
iamback is offline  
Old 1st April 2010, 10:08   #715
Senior - BHPian
 
raj_5004's Avatar
 
Join Date: Jan 2008
Location: Dubai/Mumbai
Posts: 5,078
Thanked: 2,031 Times
Default

even my exclamation marks mean the same buddy !!!
raj_5004 is offline  
Old 23rd April 2010, 14:35   #716
Distinguished - BHPian
 
jkdas's Avatar
 
Join Date: Sep 2005
Location: Thiruvananthapu
Posts: 9,661
Thanked: 1,389 Times
Default

Been using nitrogen for last few months; for last 18,000kms. Never filled/topped up during this period. I went to check last day and just saw 1psi loss. Paid Rs.10 to top up all 4 tyres which I think is very decent. ( I gave the tyre gusy 100rs expecting him to give me 60rs back )

This time I filled up 30 for front and 35 for rear for my Tata Safari.
jkdas is offline  
Old 24th April 2010, 21:32   #717
Senior - BHPian
 
architect's Avatar
 
Join Date: Apr 2008
Location: Ghaziabad, U. P
Posts: 1,275
Thanked: 448 Times
Default

Quote:
Originally Posted by jkdas View Post
I went to check last day and just saw 1psi loss.
That's precisely why I fill up Nitrogen despite all "Scientific" explanations here! I fill 33 PSI instead of the regular 32 PSI and I am set for atleast 2 months with an air pump in the boot.
architect is online now  
Old 24th April 2010, 21:43   #718
BHPian
 
Join Date: Mar 2009
Location: NOIDA, Manchester & Cardiff
Posts: 565
Thanked: 43 Times
Smile 1 PSI loss in 2.5 months, better ride, cooler tires

I filled Nitrogen in my Altis in Feb, 31 psi instead of recommended 30 psi (only to avoid an early refill because the pump charges Rs 50 for a top up).

The benefits which I have observed are:-

- no tire pressure variation during or after a long drive,
- no tire heating,
- better, more comfortable ride
- No frequent top ups

the only downside is - steep charges of Rs 50 demanded for every top up.

Can any body tell me any other Nitrogen pump in Noida or Delhi
akj53 is offline  
Old 24th April 2010, 22:22   #719
BHPian
 
thelightening's Avatar
 
Join Date: Mar 2010
Location: Bangalore
Posts: 262
Thanked: 3 Times
Default

The reliance autozone, hsr layout filled my tyres with dry nitrogen freely. They used to serve like this sometime.

I am running on michelins with nitrogen inside but feel the availablity should be incrased to all fuel stations like how we fill regular air now.
thelightening is offline  
Old 24th April 2010, 22:43   #720
Senior - BHPian
 
architect's Avatar
 
Join Date: Apr 2008
Location: Ghaziabad, U. P
Posts: 1,275
Thanked: 448 Times
Default

Quote:
Originally Posted by akj53 View Post
Can any body tell me any other Nitrogen pump in Noida or Delhi
Servicecircle: HP Petrol Pump at Ashram Chowk on NH-2 on the Faridabad side (on your left just after you've left the intersection while going towards Fbd). I fill up 99% of diesel / petrol at this pump because its 2 km from my place.

However, I don't fill up Nitrogen here. Long story. I fill up at Gurgaon because this pump doesn't consider it to be a refill if originally filled from some other place so I continue refills at Gurgaon at Rs 10/- per tyre. I end up going to Gurgaon every couple of weeks anyway.
architect is online now  
Closed Thread


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Goodyear's Self Inflating Tyres carboy Tyre & Alloy wheel Section 1 26th September 2012 00:15
Inflating a tire with liquid fire Takumi-san Technical Stuff 6 28th September 2010 13:47
Nitrogen in car tyres ac 427 Technical Stuff 2 26th April 2007 15:46
Nitrogen filling in car tyres sn48001 Tyre & Alloy wheel Section 1 5th January 2007 14:47


All times are GMT +5.5. The time now is 17:32.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks