Thread: Air Tank

I found a returned air compressor at Supercheap Auto. $40 for parts only. 20Lt tank, pressure switch, etc.

Originally Posted by Pedro_The_Swift

if you could Paul,,

we'll find a place for it on site,, somewhere---

Here it is! I've created a spreadsheet to do all the calculating rather than just posting equations.
It calculates the theoretical capacity and/or pressure required in an air tank to inflate tyres without additional assistance from a compressor.
I've set it up so that only the values that need to be altered, can be altered. The sheet is protected for this reason only. Feel free to unprotect it to see how it works.
I've also included it as an html file, but I suspect that it still requires Excel in the backgroud to drive it. (I can't test this because all of my computers have Excel installed)

Keep in mind that this is all based on theoretical ideals so will not be 100% accurate in practice. It should however be useful as a guide.

I would welcome feedback from anyone with some stats from their experiences so that I can refine it a bit more. Also, if you notice any errors let me know.

Originally Posted by awabbit6

Here it is! I've created a spreadsheet to do all the calculating rather than just posting equations...

Hi Paul,

Thanks for calculator!

The excel version works OK, HTML not on my PC. Says "To use this Web page interactively, you must have Microsoft® Internet Explorer 5.01 Service Pack 2 (SP2) or later and the Microsoft Office 2003 Web Components". I have WinXPSP2 and IE7.0 and MSOffice2007. Just FYI.

Could you please create another calculator to work out best air tank size if you know
1. Wheel size
2. Air compressor air flow (L/min)
3. Air tank top pressure (cutoff switch pressures)
4. Start/end tyre pressure

For example, I pump 4 tyres 265/75R16 from 20psi to 40psi faster with 7.5L air tank rather than direct. Bushranger air compressor, from memory 72L/min, pressure switch 75/100psi.

Cheers,
Ruslan

Originally Posted by Ruslan

Could you please create another calculator to work out best air tank size if you know
1. Wheel size
2. Air compressor air flow (L/min)
3. Air tank top pressure (cutoff switch pressures)
4. Start/end tyre pressure

For example, I pump 4 tyres 265/75R16 from 20psi to 40psi faster with 7.5L air tank rather than direct. Bushranger air compressor, from memory 72L/min, pressure switch 75/100psi.

Cheers,
Ruslan

Should be able to. I'll have to include the time you want to be able to inflate the tyres in too.

Give me 20mins .... LOL

... I'll work on it!

Originally Posted by Ruslan

Says "To use this Web page interactively, you must have Microsoft® Internet Explorer 5.01 Service Pack 2 (SP2) or later and the Microsoft Office 2003 Web Components". I have WinXPSP2 and IE7.0 and MSOffice2007. Just FYI.

Mine did that too. Click on the yellow bar at the top of the page to activate it and it should work.

Originally Posted by awabbit6

Should be able to. I'll have to include the time you want to be able to inflate the tyres in too.

Give me 20mins .... LOL

... I'll work on it!

yes, and calculate "ideal" time delay between tyres!

1st tyre gest air from full tank
2nd, 3 and 4 start pressure depends how quick you jump from one tyre to another.

Mine did that too. Click on the yellow bar at the top of the page to activate it and it should work.

done that, but still no luck

I'm happy with excel version

P.S. What about air hose size?

Thanks Guys,

Thats a great deal of info posted. I only put the tank in because i was thinging of neumatic locks so a three ltr is ample for that. I may even jimmy around and become a "fixer" for a day and place the 3 ltr in line as well and put in a isolating valve somewhere.

May even go the old 12 ltr steel scuba tank and keep 300 bar of reserve under the car.

Oh and thanks for the calculator.


Cheers.
Snap