Outer Limits 4x4 Board

I already have a ARB compressor fitted for the diff locks, which has the outlet connection (originally for the pissy little hose they give you to inflate tyres). In theory this is a good idea, but I dont like waiting what feels like an eternity to inflate all 4 35" tyres.

My plan is to fit a air tank in the truck and run a hose direct from the outlet of the compressor to the tank, and then run a hose out of the tank to the bullbar and rear bar.

My questions are...

1) would the regulator on the compressor cut off when the 2nd tank reaches the same psi that the compressor normally cuts out at? Or would the compressor just keep pumping?

2) would I need to put a regulator on the 2nd tank?

3) The 2nd tank would (in theory) reach the same psi as the original, but because the 2nd tank has a larger capacity this would give a longer burst of air without the compressor kicking in again...of is my mind just playing games with me

I hope that all makes sence, it turned out to be easier said than done in trying to explain my thoughts!

thanks in advance.

1) the pressure switch on the arb would function as normal. no need for second switch.
2) no, if you're only going to be doing tyres, however regulators usually have a water trap built in and this is always worth having.
3) you're spot on.

Only suggestion i would make is that you have a safety pressure releif valve on the new tank.
your compressor will still run the same amount of time to pump up the tyres, but some of that running will be after the tyres are actually inflated in order to get the tanks back up to pressure.

Cheers
Matt

thanks for that...just wondering if anyone knows what psi an ARB compressor cuts in and out at.

I have heard its around 90psi (max) and 15psi (min)...is this correct?

i wouldnt waste ur money trying it with a arb, it wont help it pump up the tyres ne quicker or take any load off the compresser.
Yes u will get more capacity but it will take forever to fill the tank and u will still have the compresser running flat out while filling the tyres.
The tank pressure will never get high enough to stop the compresser while ur filling the tyres, if it could ur arb would be constantly on and off while filling the tyres with the small tank.

better off setting up a aircon pump for onboard air or getting a c02 tank

pressure switch opens at 100 psi (off) and close's at 70psi (on)

spazbot wrote: it wont help it pump up the tyres ne quicker or take any load off the compresser.
Yes u will get more capacity but it will take forever to fill the tank and u will still have the compresser running flat out while filling the tyres.
The tank pressure will never get high enough to stop the compresser while ur filling the tyres, if it could ur arb would be constantly on and off while filling the tyres with the small tank.

It will help fill the tyres to pressure faster as you have all this extra compressed air. no it wont reduce load on the compressor as the compressor will run on for longer after the tyre filling is complete in order to refill the tank. It just provides an initial buffer/initial boost to airflow to help get you out of there faster.

Matt

spazbot wrote: it wont help it pump up the tyres ne quicker or take any load off the compresser.
Yes u will get more capacity but it will take forever to fill the tank and u will still have the compresser running flat out while filling the tyres.
The tank pressure will never get high enough to stop the compresser while ur filling the tyres, if it could ur arb would be constantly on and off while filling the tyres with the small tank.

It will help fill the tyres to pressure faster as you have all this extra compressed air. no it wont reduce load on the compressor as the compressor will run on for longer after the tyre filling is complete in order to refill the tank. It just provides an initial buffer/initial boost to airflow to help get you out of there faster.

Matt

Unless you have a huge air tank like 200 or 300 litres it won't make stuff all difference to your pump up time. If you want QUICK air up times set up an air cond pump which is very easy to do.

http://www.outerlimits4x4.com/PHP_Modul ... r+tank+set

http://www.outerlimits4x4.com/PHP_Modul ... c&start=60

this might help

DR Frankenstine wrote:Unless you have a huge air tank like 200 or 300 litres it won't make stuff all difference to your pump up time. If you want QUICK air up times set up an air cond pump which is very easy to do.

300 ltrs are u shittin me... my 2hp compresser at home gets a 33 from 10 to 20psi before the compresser even cuts in.. so thats the burst u get outa 24 ltrs. thats a fair head start on someone wihtout a tank.
300 is farkin huge.. u could pump all your tires up without it even cutting in!..

Slayer wrote:

DR Frankenstine wrote:Unless you have a huge air tank like 200 or 300 litres it won't make stuff all difference to your pump up time. If you want QUICK air up times set up an air cond pump which is very easy to do.

300 ltrs are u shittin me... my 2hp compresser at home gets a 33 from 10 to 20psi before the compresser even cuts in.. so thats the burst u get outa 24 ltrs. thats a fair head start on someone wihtout a tank.
300 is farkin huge.. u could pump all your tires up without it even cutting in!..

Yep thats right and it takes only 2 minutes for your home compressor to pump the 30l tank up. so an arb compressor would take a lot longer. When you save 2 minutes on a 40 minute air up its not worth the effort. what about the other 3 tyres? Air tanks are only good on pissy compressors for small volume IE: diff locks and a quick squirt on the rattle gun. NO good for high volume like pumping up tyres

ARB switches cut out at 90psi and in at 70psi (may be 100psi)

1.1CFM at 0psi you will take prolly over and hour or more to fill a decent tank and the chances are the lenght of time it will be pumping at the higher PSI range would kill the comp. even a bushranger maxair will strugle (have tried) but is a ber option than the ARB. IMO the best way to go is get a thomas compressor, the flows are much better and they are made for a longer duty cycle as they are built for industrial uses.

as said if you want to continue along the ARB line, plumbing the new tank from the old tank will work as the when they both reach pressure they the switch will cut out.

aftermarket switches are available like the arb ones or adjustable

ie

http://www.my4x4.com.au/onlinestore/sto ... duct=10719

http://www.my4x4.com.au/onlinestore/sto ... duct=10720

or a complete thomas type set up with tank

http://www.my4x4.com.au/onlinestore/sto ... duct=10714

if you are setting up a new system by getting a cheaper comp like the max air you will need a non return valve, a pressure releif valve, a pressure switch and hose / fittings, this can be a pretty price effective way to go.

feel free to PM me of give me a bell on 02 9894 8400 if I hav confused you

Adam

ive got a 18lt tank with 2 bushranger max airs hooked to it, takes about 2 and a half minutes to charge from empty to 125psi. its quick to re inflate tyres but thats due to the 2 comps not the tank, what the tank stores wont even fully re inflate a tyre from 12-36psi. i wouldnt bother with an ARB comp, they only pump out about 35 lts a minute. the 2 bushrangers i use pump about 75lts a minute, so that gives me 150lts a minute in total, and i still wish i had more. the tank is very handy for running the rattle gun though

i had a york a/c compressor and it gave about 8 cfm. it did 16 tyres 33-35's in the same time an arb did 3 35's from 15-30psi.

why fark spiders

an air tank will do squat, run a a/c pump and a small tank just big enough to run a switch without it going on / off every sec like 5lt and its all good.

safety valve mandatory

cheers bru

edit to add:

the volume in my bundera bar at 150psi was enough tto fully inflate a 2 person blow up boat for dirking beer in at freshwater lake. took like a minute to re inflate when i started the car back up and was quiter than those arb farkers. also wire it with a drop out relay so you have to reset it every time the car is running so it doesn'd try to compress with the starter motor

When you guys say to use a air con pump as the compressor...you obviously mean that somehow you can turn the air conditioner pump into an air pump...this to me seems like a better idea!

But how is it done?

Its in a 83' HJ60 diesel 2H

make the big tube a filtered inlet (oil every now and then to lubricate valves etc) the little tube connects to the tank. the big tube can be anything, the little one is better in brazed metal, or at the very least the original tubing for the first few feet as it gets quite hot. the clutch become the on/ off - connect to drop out relay. done

it is that easy. that said a york is by far the best but they are the biggest and are a twin piston design, if you can fit one $40 should get you one

cheers bru

why not run co2?

why not run co2?

i am going to fit an air tank to the 80 when the false floor is in and fill from the compressor at home (the outlet on rear bar will be fill point) before going out to save the toy 12v compressor from having to fill the tank every time, an other one i have heard of is to fill the spare over presure and drain from it, one tyre maybe again just to save 12v compressor just drain before using spare do not know how safe that is have to ask tyre fitter

but if filling 35's all the time a real compressor is needed ie belt drive off motor

Geoffrey Dick wrote:why not run co2?

Price, have to refill at an outlet, but great for comp rigs etc

G_loomis wrote:When you guys say to use a air con pump as the compressor...you obviously mean that somehow you can turn the air conditioner pump into an air pump...this to me seems like a better idea!

But how is it done?

Its in a 83' HJ60 diesel 2H

Ive seen a second air-con pump on an HJ60 set up next to the existing pump-mounted on the same bracket . Pulley of existing pump was changed for a double groove type with a short belt connecting the second pump. Ford Cargo truck airtank mounted between chassis rail and sill on passengers side. Long bit of aircon hose connected pump to tank via a non-return valve. Pressure switch with inbuilt unloader valve controlled air pressure. Quick connect mounted on rear bumper

Nick

Tiny wrote:

Geoffrey Dick wrote:why not run co2?

Price, have to refill at an outlet, but great for comp rigs etc

its not that dear really, i think boc said $20 a fill and that does what 10 or 20 tyres (its bigger than air up) and a regulator (mine was $140 but the beer ones might freeze up)

but an arb is like $300.

so its all relative