Viair 450P portable compressor ........... - Toyota FJ Cruiser Forum
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post #1 of 14 (permalink) Old 04-02-2018, 06:50 PM Thread Starter
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Viair 450P portable compressor ...........

I need some help from the brain trust as I'm an electrical idiot.

I need to to know if the alternator/electrical system on my 2010 FJ will handle a portable compressor that pulls 23.0 amps at 12 volts. I'll be connecting to the battery with the supplied cable clamps.

I'm also assuming I'd need to leave the engine running while airing up.

As the title states I'm looking at the Viair 450P compressor.

Any help would be appreciated!

Thanks

BrewsterII

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Last edited by BrewsterII; 04-02-2018 at 08:34 PM.
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post #2 of 14 (permalink) Old 04-02-2018, 07:00 PM
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Re: Viair 450P portable compressor ...........

You will be OK using a direct battery hookup. Running the engine while using the compressor is a good idea but for short periods not required.
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post #3 of 14 (permalink) Old 04-02-2018, 08:33 PM Thread Starter
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Re: Viair 450P portable compressor ...........

Quote:
FJ4RWS previously said: View Post
You will be OK using a direct battery hookup. Running the engine while using the compressor is a good idea but for short periods not required.
Thanks, I really appreciate the reply!

BrewsterII

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post #4 of 14 (permalink) Old 04-02-2018, 09:12 PM
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Re: Viair 450P portable compressor ...........

I went with the Extreme Air Magnum from Outback Extreme and fused it at 150 amps and a 300 amp switch.
It was fine on the stock system. I eventually changed out the stock alternator and battery, but that was more because of all the other junk...winch, stereo, ham radios etc.
My install is on page 1 of my old build thread if you want to see it:
https://www.fjcruiserforums.com/forum...fy-animal.html

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post #5 of 14 (permalink) Old 04-02-2018, 09:32 PM Thread Starter
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Re: Viair 450P portable compressor ...........

Quote:
scrufy previously said: View Post
I went with the Extreme Air Magnum from Outback Extreme and fused it at 150 amps and a 300 amp switch.
It was fine on the stock system. I eventually changed out the stock alternator and battery, but that was more because of all the other junk...winch, stereo, ham radios etc.
My install is on page 1 of my old build thread if you want to see it:
https://www.fjcruiserforums.com/forum...fy-animal.html
Thank You!

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Achilles ......
Unequivocally, the most radical, baddest, highly modified 4X4 in my driveway.

"It's not just a truck, it's a 4 wheel drive man cave."
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post #6 of 14 (permalink) Old 04-02-2018, 11:00 PM
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Re: Viair 450P portable compressor ...........

Cheers!
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Last edited by 10851; 07-31-2018 at 10:40 PM.
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post #7 of 14 (permalink) Old 04-03-2018, 08:27 AM Thread Starter
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Re: Viair 450P portable compressor ...........

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You will be fine.... That is a good air compressor. I carry a similar one as my back-up when teaching off road driving classes. I highly recommend keeping the engine running when using the air compressor. If you have a good battery (like FJ4RWS has already said) you can run it for a short period of time without the engine running however, the compressor will run slower and take more time to inflate the tire. Be sure to wear gloves if you are going to touch the cylinder head or the air fittings near the head.... (Unless you are trying to get rid of your finger prints)... Be sure to allow the cylinder head to cool before closing the lid on the carry bag or you will melt the inside of the lid/flap. I always completely remove the compressor from the bag prior to using it... You want plenty of air circulation. Finally.... Take extra care to not let the power cord get caught in the serpentine belt or radiator fan.... Do not let the air hose come in contact with the hot exhaust system... You may want to carry a spare air hose with fittings and intake air filter. (Felt disc) Be mindful of the duty cycle and that air compressor should last a long time...

Cheers!
Thanks for the input! I chose this one due to the 100% duty cycle. I'm hoping to cut my air up time in half using a bigger unit. At the end of a day I want to keep moving, standing in 110 degree AZ sun gets old real quick as I get older!

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post #8 of 14 (permalink) Old 04-03-2018, 09:24 AM
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Re: Viair 450P portable compressor ...........

Quote:
BrewsterII previously said: View Post
Thanks for the input! I chose this one due to the 100% duty cycle. I'm hoping to cut my air up time in half using a bigger unit. At the end of a day I want to keep moving, standing in 110 degree AZ sun gets old real quick as I get older!


Cheers

Last edited by 10851; 07-31-2018 at 10:41 PM.
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post #9 of 14 (permalink) Old 04-03-2018, 09:50 AM Thread Starter
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Re: Viair 450P portable compressor ...........

Quote:
10851 previously said: View Post
You may want to check the duty cycle specifications. Mine is rated for 100% duty cycle @ 70 degrees F. You will still need to let it cool down for a short period in 110 degree F temps. If you are only airing up your own tires, don't worry about it. Just moving from one tire to the next will give it a short break. I used mine to air up 4 vehicles with 33-35 inch tires in 122 degree F. The tires started at 12-15 psi and were inflated to 35 psi. I gave it a 10 minute cool down after each vehicle. If you hear the compressor slowing down, let it cool...

Cheers
Got it! More often than not it will be just my truck. The really "inexpensive" compressors can make for a rather long delay when heading to the pavement, just trying to minimize the time .... and have a better unit to boot. Cheap stuff just tends to P*** me off!

Thanks again!
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post #10 of 14 (permalink) Old 04-03-2018, 10:01 AM
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Re: Viair 450P portable compressor ...........

Quote:
BrewsterII previously said: View Post
Got it! More often than not it will be just my truck. The really "inexpensive" compressors can make for a rather long delay when heading to the pavement, just trying to minimize the time .... and have a better unit to boot. Cheap stuff just tends to P*** me off!

Thanks again!
Nothing worse than when the cheap one melts down and you have to figure out a plan B.



I've heard good things about Viair and I use ARB with no complaints either.

Suck it up... it's only -40
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