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Author Topic: Air  (Read 3242 times)


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« on: October 10, 2006, 05:03:19 PM »
What air pressure do most of you recommend?

I heard at the recent rally that one fellow runs his at around 90 lbs cold. Sounded good to me but my question is, is that for ALL tires including the tags?

I checked mine today after sitting all night and they were all 108 and the tags were 80 and 85. I say ALL but I had no way to check the inner drives. Some SOB installed them so I couldn't I guess, so it looks like they will have to come off soon so I can! Maybe that would be a good time to install a monitor like the one JC has. Sounded pretty nifty from what I overheard! Anyone know where to get this item at or from and how much they run?



Online TomC

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Re: Air
« Reply #1 on: October 10, 2006, 05:10:51 PM »
Ace- If you want to know exactly what to run in your tires, weigh the bus by axle with it full like when you are going on a trip. Give me your tire make, model and size and I can look up what you should run.  I have 11R-24.5 16 ply with 10,500lb front axle and 20,500lb rear axle.  I run 90lb. 

I have the wireless tire monitors that screw into the tire stem.  They work, but am not real impressed.  I inflated the tires to the same tire pressure by my hand gauge.  When I installed the sensers, they all read different pressures (from 86 to 92).  But the real purpose is to make sure they don't go down beyond 75%.  Good Luck, TomC
Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.

Offline kyle4501

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Re: Air
« Reply #2 on: October 10, 2006, 05:50:26 PM »
For what it is worth, I agree with TomC. I would also suggest a side weight on each axle too. That way you will KNOW the actual weight carried by each tire & then TomC's air pressure info will be of maximum benefit.

Also, once you know the side - side loading, you will be able to compensate if necessary.

By the way, You don't need my bus parked near by to make yours look good! ... but do be careful what you ask for, you might endup wanting your own 4501 (ROTFLMAO)  ;D  ;D  ;D  ;D
Life is all about finding people who are your kind of crazy

Get your facts first, then you can distort them as you please (Mark Twain)

Education costs money.  But then so does ignorance. (Sir Claus Moser)

Offline H3Jim

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Re: Air
« Reply #3 on: October 10, 2006, 07:52:05 PM »

I took the max weight per the plaque in the front, and I also weighed mine. It only cost $8, and they gave it to me by axle.  I did not get side to side, but that would be good to know how well I balanced it.  I run Michelin 315/80 R22.5 Pilote XZA1 tires.  I am so under loaded that it does not call for much pressure. I run them higher for better fuel mileage.  I had to pay the shop to re-position my inner duals so I could add the long stem so I could check my air pressure regularly.  Pretty irritating they didn't do that in the beginning when I bought the tires.  I see the formatting did not come out very well.  It looks good while I'm editing it, but after I post it, its pretty hard to read. Hopefullly you can make sense out of it.

         H3-41            H3-40   

per vehicle plaque      Max vehicle load      air pressure            
      Front    16,500    115          14,000    
      Duals    22,500    90          25,000    
      tag    14,000    100          10,000    

          52,500    GVW          42,500    GVW

                                                                         Actual pressure as of
actual      Front    10,580    80   95         
weight      Duals    17,460    80   84         
      tag    10,520    80   95         
          38,560 lbs total coach weight for now, but I keep adding more things.               
« Last Edit: October 10, 2006, 07:54:15 PM by H3Jim »
Jim Stewart
El Cajon, Ca.  (San Diego area)

Travel is more than the seeing of sights, it is a change that goes on, deep  and permanent, in the ideas of living.

Offline Beatenbo

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Re: Air
« Reply #4 on: October 10, 2006, 08:13:06 PM »
Some folks claim lower pressure rides smoother. I use to run 95 front 90 rear in my GMs, my MCIs heavier I've always run 105 in front 110 in rear. MCI has a 20K lb rear.

Offline ol713

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Re: Air
« Reply #5 on: October 10, 2006, 09:03:16 PM »

  For what it's worth,  I use the K.I.S.S. method for tire air pressure.   On my MCI, I run with
  100lbs all the way around.  No wondering, no weighing, no problem.  However they do
  need to be checked before each trip.       Good luck.

Offline mikeH8H-649

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Re: Air
« Reply #6 on: October 11, 2006, 02:51:59 AM »
Ace,if I remember correctly Jack Conrad has a tire moniter system that he was happy with so you might ask him,and on another note I will park my bus next to your's anytime besides really enjoying your's and Susan's and bud company it really make's me want to get more done to mine,I did get one a/c and one fantastic vent installed yesterday,now to get it in primer before the weather turns bad

Online TomC

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Re: Air
« Reply #7 on: October 11, 2006, 12:38:59 PM »
Ace- the Michelin inflation table starts at 85psi.  With a single that would be 12,830lb per axle and dual would be 23,360lb per axle.  I see no need for anything over 85psi, with 80psi being still alright.  Good Luck, TomC
Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.