Calling all MoHomers with air suspension.

Discussion in 'Tech/Mech General' started by Trikeman, Apr 20, 2014.

  1. Trikeman

    Trikeman Read Only Funster

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    Hi All,
    as I finished my air suspension install yesterday I am reaching out to owners with rear air suspension to find out what pressures you run for 'normal' loaded usage.
    :thumb:

    My intention is to experiment over the long term, I also understand that differing imposed rear axle loads affect settings (most of us are on the limits so we are all within a few kilos) :Eek!: however, I am interested in finding out what the 'average pressure' is, for a starting point.

    Yesterday on road test I set pressures at 35, 45 and then 60psi and did the same route and not too much noticeable difference, other than a few cm's height and 'yaw' stability differences. If I get to the 'optimum' pressure, this is what I aim to maintain from there on in. For the greatest part of our usage our Autotrail is nearing the upper weight limits.
    :Blush:

    Your thoughts and recommendations, as always, will be greatly appreciated.

    Regards,

    Trikeman. :Wink:
     
  2. Peter & Elaine

    Peter & Elaine Funster

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    I use
    Running light 35 psi
    Medium load 45 psi
    And when overloaded 70 psi just to keep head lights on road
     
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  3. Armytwowheels

    Armytwowheels Funster Life Member

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    Colin says - we run ours at 55psi. Ours is quite and old system and was installed quite a few years ago. Not sure if the age of the system makes any difference.
     
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  4. jemhorn

    jemhorn Funster

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    Air Suspension

    That's a coincidence Phil from Rhino installs is here on Tuesday to fit a system on my Laika. Hope all goes well as on Plymouth Roscoff 10pm sailing! Will then join the debate!
     
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  5. JonMac46

    JonMac46 Read Only Funster

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    I use 56 psi on our rated 3200kg camper, Hankook tyres.
     
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  6. ericonabike

    ericonabike Read Only Funster

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    Interesting. We have an Autocruise Starseeker with recently-fitted rear air. Manual tells us to set at 1.5 bar [21 psi]. Fitter said to run it at 2.5 to 3.5 bar [35 - 50 psi]. Can honestly say I've noticed little or no difference in ride at any level! I leave it at just under 3 bar [48psi]. Rear axle loading is 1800kg, give or take 100 or so. You'd think there would be a chart somewhere to show pressure required for a given axle weight, since presumably there are no other determinants?
     
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  7. Printermick

    Printermick Funster

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    On Hymer B544

    My gauges are in bar readings and I run at 2.5 or 3 (30 to 40 psi.)
    Really only notice improvement on rough roads and being overtaken by fast coaches and trucks. Handy for more clearance on ferry ramps.

    Like anything try different settings and see what feels right.
     
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  8. Taran_Las

    Taran_Las Funster

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    I run exactly the same pressures as Peter & Elaine. But, because I would never do anything remotely wrong I don't need the highlighted bit :Wink:
     
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  9. ivorantony

    ivorantony Funster

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    I normally run mine at 2 bar for all normal use and only put it up to 3.5 bar for the ferry, then lower to 2 bar when on the other side,
    The main reason for fitting it was the enhance stability on corners and overtaking coaches,
    trucks aren't a problem I am normally going quicker than them:BigGrin:
     
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  10. pappajohn

    pappajohn Funster Life Member

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    email the manufacturers with your normal axle weights.

    I have around 4.5 ton on the rear and run at 60psi.
     
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  11. DP_JAY

    DP_JAY Funster Life Member

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    25psi max fully loaded (4000kg) Any more than that & the shocks keep topping out, but put it up to 50 for loading on ferries etc. to stop the tow bar grounding.
     
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  12. Wilderbeast

    Wilderbeast Funster

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    As air suspension

    The suspension assistance fitted on our Aviano is the one supplied and fitted by AS the instructions state minimum setting of 2 bar to maintain air bag shape with a Max of 7 bar but not to be used at this pressure for running, only manuvering purposes ferry etc:
    I run at approx 3 bar and it seems okay.:Smile:
     
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  13. autoswan

    autoswan Funster

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    I have the air ride set at 35 psi on my auto trail, itfeels ok but not sure what best pressures are for load so had to judge it myself.
     
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  14. Techno

    Techno Funster Life Member

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    On my Starspirit I eventually settled on 3.5 bar for normal running and 5 to 7 bar fully laden.
    Adjustments for on site leveling being the exception.
     
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  15. davejen

    davejen Funster

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    Inoted the replies, but do you feel the system is a benefit? if so in what way, or is it a waste of money?
    Cheers, Dave:thumb:
     
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  16. Barclaybasher

    Barclaybasher Funster

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    My 04 plate van was fitted with air suspension soon after I bought it 2 years ago - had new rear shocks fitted at the same time - not a lot more to do as I figured they would be shot after 8 years

    Noticed a big difference, cornering and particularly on roundabouts - much more stable - and less scary - well worth the money



     
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  17. Millibobs

    Millibobs Funster

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    Hola :BigGrin
    tend to always have mine on 3 to 3.5. Barr normally and 4 if very windy. We have Overcab which catches the wind. Blowing up to full certainly helps stability when on the autovias.
     
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  18. Trikeman

    Trikeman Read Only Funster

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    Dave, early days yet but for sure it has transformed my MoHo as far as driving stability is concerned. Cornering, especially roundabouts is like night and day in comparison, I was always, sort of gripping the seat with my butt cheeks on long slow roundabouts, but on my tests yesterday and today that has disappeared. Wind buffet and drift has almost gone and coach over takes are a different world - straight line stability is superb.

    The ride itself is different too, less roll and bumps seem to be 'softer'. Bad bits of roads around where we live have always given us a jolt but it now seems instead of a sharp jolt, the bump seems more 'rounded', if that makes sense. It is the best upgrade I have done and wished I had done it ages ago. Not so much internal rattling either.

    Hope this helps,

    Trikeman. :Wink:
     
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  19. Reallyretired

    Reallyretired Funster

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    I have experimented with a few different pressures, and have found it seems to give the best stability and ride at 50psi on our MH.
     
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  20. pneumatician

    pneumatician Read Only Funster

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    Without motorbike in the boot approx 1.5bar with bike in the boot upto approx 2.5 bar.
    Inflate too much and the ride is too hard.
    Main reason for installation was so I could take islands at speed :)
     
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