Thumper Twin Air Compressor install

4x4 Earth Black Friday Sale

Mr Rum

4x4 Earth Legend
and it wont take 30 mins to reinflate 4 tyres after letting them down.
Wouldn’t expect so.
These compressors are supposed to have a higher output than my little ARB one, and it gets each of my 32” tyres from 8psi to 40psi in around 2m 45s.
That’s 11 mintes for all four, plus the extra 30 seconds or so that it would run to fill my tank before I start on the tyres.
 

Silveredition

Active Member
Just a quick update on the performance of my Thumper Twin install... It is working perfectly, and consistently! Kids bike tyres, motorbike tyres, re-inflates after beach trips are all a matter of plugging the hose into the rear bumper and flicking the switch on the dash - easier and quicker than a trip to the servo or mucking around with the 240v compressor.
I did blow a section of the Bunnings air hose a few months back, but had enough slack to cut it out. I carry spare, but if it happens again I will replace the lot with better air hose.
In comparison with a mate with similar sized and pressure tyres, it was more than twice as quick (he has the 150L/hr single piston generic eBay compressor).
I still carry my Thomas Blue Tongue in the back of the car as back-up - for how long ????
 

Jason Watt

Well-Known Member
I foolishly lent mine to my son who eventually gave it back to me broken.
The non-return valve in the air hose was cooked.
He later admitted he'd aired up 6 vehicles in a row without turning it off!
I replaced the hose, fittings and valve with a custom built airline courtesy of EnZed.
Bloody hose cost more than the Thumper!
It's now bullet proof.
 

AndyOffroad

New Member
Does anyone have info on the pressure cutout switch? I'd like to adjust it down to about 80 instead of the said 125 PSI. That'll save a lot of the components from running at the extremes when I use a air-switch (like at the service station pumps) at the end of the hose.

I think in a lot of cases there is simply some set screws that determine the pressure of a spring which is connected to or controls the switch. Know what I mean? I'm wondering if this twin thumper has something like that as well, and can it be adjusted? (usually there are two set screws, one for the max pressure for cut-off, and another for the low-pressure to switch on and start pumping again).
 

Silveredition

Active Member
Does anyone have info on the pressure cutout switch? I'd like to adjust it down to about 80 instead of the said 125 PSI. That'll save a lot of the components from running at the extremes when I use a air-switch (like at the service station pumps) at the end of the hose.

I think in a lot of cases there is simply some set screws that determine the pressure of a spring which is connected to or controls the switch. Know what I mean? I'm wondering if this twin thumper has something like that as well, and can it be adjusted? (usually there are two set screws, one for the max pressure for cut-off, and another for the low-pressure to switch on and start pumping again).
I think it would be a good idea if it is possible to do.
I use mine at least once per week, and havent had any trouble with it, but I always allow the air to flow through it (even using an air blower, I hold the trigger on the whole time). The only dramas I have ever had was when I first used it and allowed the pressure to get to the cut-out...
 

AndyOffroad

New Member
Unfortunately no adjustment on the pressure cutoff..it is similar to this:
So presumably it could be replaced with something like this from ebay which has a 70-100 psi option?
 

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Turorit

New Member
In
So presumably it could be replaced with something like this from ebay which has a 70-100 psi option?
In theory :) the one in my picture was $5 from AliExpress but did not match the thread for the one inside the thumper. Can't tell you what the correct thread is, sorry.
 

Silveredition

Active Member
A quick update...
After 2 and a bit years the Thumper Twin compressor is still performing faultlessly... I haven’t had a look under the car at how the air filters are going, or what the compressor even looks like, but I use it at least once a fortnight and it just works....
I plug the hose in to the rear bumper fitting, start the car, bump up the idle, flick the switch on the dash, pump the tyres up, then turn the dash switch off - so the compressor runs the whole time without building up pressure above what I am putting into the tyres...
It is quick and doesn’t trip the circuit breaker...
A fair bit of moisture does come out of the air line though, so I might fit a moisture trap somewhere in the line....one day... maybe...
 

Rabbits1350

New Member
No worries :) Its a thirsty beast!
I'd originally run the 6B&S for my fridge/other accessories. The mounted compressor was an afterthought, fortunately it kinda worked out...
Ideally I'd have a 4AWG+ run to the starter battery and a smaller gauge to the second battery for the fridge, hopefully would still fit under the sill trim panels.
Looking at running wire to my rear compartment and fitting a 120A Anderson plug to keep my thumper portable. Would running 4AWG with a 120A blade fuse near the starter be fine? Any help would be appreciated. Cheers
 

CaptainBanana

Well-Known Member
Looking at running wire to my rear compartment and fitting a 120A Anderson plug to keep my thumper portable. Would running 4AWG with a 120A blade fuse near the starter be fine? Any help would be appreciated. Cheers
Over that length of Run 4 gauge should be able to supply around 135 amps continuous which you'll never use so it's absolutely fine.
Regarding the fuse I would be using a midi fuse or something more robust then a plastic blade fuse. Because you are using 4 gauge you can also use a car audio style fuse.
 
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Rabbits1350

New Member
Over that length of Run 4 gauge should be able to supply around 135 amps continuous which you'll never use absolutely fine.
Regarding the fuse I would be using a midi fuse or something more robust then a plastic blade fuse. Because you are using 4 gauge you can also use a car audio style fuse.
Thanks mate!
 

Rabbits1350

New Member
Is anyone able to please add a photo of the connection to the battery? I cant find anything specific around best way to connect my (planned) anderson plug wiring setup to the battery. I now plan to keep my Thumper portable and use 4AWG wire with a 120A MIDI fuse and a 120A Anderson plug installed in the rear of the car. Its a 2016 Mitsi Pajero Sport so want to be sure I can just hook the positive and negative straight to the starter battery terminals. Cheers
 

Warby

Well-Known Member
Is anyone able to please add a photo of the connection to the battery? I cant find anything specific around best way to connect my (planned) anderson plug wiring setup to the battery. I now plan to keep my Thumper portable and use 4AWG wire with a 120A MIDI fuse and a 120A Anderson plug installed in the rear of the car. Its a 2016 Mitsi Pajero Sport so want to be sure I can just hook the positive and negative straight to the starter battery terminals. Cheers
Ring terminals at the battery end of the cable.. Make sure you have a fuse as close as possible to the battery.
 
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