air compressor kit

Borrego60

Borrego60

Rendezvous Conspiracy
Running a Extream Outback compressor,mount it anywhere,anyway you like even upside down, been real happy with it.
 
O

off-roader

Expedition Leader
4RunAmok said:
I've seen people's MV-50 fail on them and have always worried about mine failing me.
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Many of the guys I wheel with run them because they're inexpensive, reliable, and fast.

I agree that the 90 would be a nice upgrade to the MV-50, but look at the price? The MV-90 at the link he provided comes in at $159.00 and it has their stupid hose. But I can re-tap it to a standard fitting. I see it has in an line pressure release valve next to the cylinder head. But no mention of thermal protection. Found cheaper ($131.50) here: http://www.lowrangeoffroad.com/superflow-mv-90-mega-air-compressor-mv90.html

The WARN SPC (http://www.warn.com/truck/aircompressors_spc.shtml) uses standard hose fittings and hoses, comes in at $113.00, and it has thermal protection.

I'd probably go with the Warn.
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That warn model's only at 1.5 cfm w/ 150psi max. Not sure what the duty cycle is since it doesn't mention it, but I'd guess it's not 100%.

Comparatively the MV90 is at 3.7cfm, w/ 150psi max pressure & again 100% duty cycle.

Based on that this warn model isn't even in the same league as the MV50 which is rated a 2.5cfm and is only half the price of this Warn unit.

Now if that Warn unit was say ~$80 or there was some other relevant advantage it might be worth considering but to pay 2x for what appears to be the marque and the marque's reputation is not worth it IMHO.

BTW, if you replace the fittings for either the MV50 or MV90 make sure you use an open chuck style and not a closed chuck since it requires a fitting that remains open.

And I agree that they do get hot but so do many other compressors like my old ARB unit for example. To those who know the Warn compressor line, which of the Warn compressors would you compare to the MV90 based on a combination of features and price?
 
O

off-roader

Expedition Leader
BTW, that viair 400p is the relative equivalent of the mv50 (albeit considered by some to be superior in build quality) and not the mv90.
Here's a video comparing the MV50 (similar to the 400p) to the MV90...
[ame="http://www.youtube.com/watch?v=MSZe25to95A&feature=related"]YouTube - Superflow MV90 verses MV50 Air Compressor comparison[/ame]

I also meant to add that it's weird that they rate the MV90 as a 100% duty cycle compressor yet indicate that it should be run for 40min max. I though 100% duty cycle meant it can run indefinitely?? Perhaps that website that had it at 100% was misinformed (can't find it now). I checked several other sites & they rate it at 50% duty cycle.
 
Last edited:
REasley

REasley

Adventurer
off-roader said:
Comparatively the MV90 is at 3.7cfm, w/ 150psi max pressure & again 100% duty cycle.

BTW, if you replace the fittings for either the MV50 or MV90 make sure you use an open chuck style and not a closed chuck since it requires a fitting that remains open.
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Just to correct a little misinformation here. The duty cycle on the MV90 is 60%. Q industries recommends that you run their compressors no more than 40 minutes with a 20 minute cool down.

Most, if not all compressors that are not equipped to auto cycle need to have an open flow on start up. They need to bleed the pressure off the compressor head for no load starting. Trying to start against a load will lead to over heating, blowing fuses, and shortened compressor life. You can use most of these compressors to fill a tank, but either the switch that cycles the compressor or the check valve at the tank must bleed the air off of the head before start up.
 
O

off-roader

Expedition Leader
REasley said:
Just to correct a little misinformation here. The duty cycle on the MV90 is 60%. Q industries recommends that you run their compressors no more than 40 minutes with a 20 minute cool down.

Most, if not all compressors that are not equipped to auto cycle need to have an open flow on start up. They need to bleed the pressure off the compressor head for no load starting. Trying to start against a load will lead to over heating, blowing fuses, and shortened compressor life. You can use most of these compressors to fill a tank, but either the switch that cycles the compressor or the check valve at the tank must bleed the air off of the head before start up.
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Thanks for the clarification on the correct duty cycle. Do you have any reference url to support that? Not that I doubt you but it's always easier during a future discussion to point to a reputable source.

As for the no load starting insight, that makes sense. I wonder if it's the same for ARB compressors? On my old one I had it plumed almost directly to a distribution block with a number of standard QR fittings w/out the check valve or any other method of bleeding off air to minimize back pressure to the head. Only issue I had with it was the o-ring to it's tank. ARB sent me a replacement via mail, no charge. That unit still works but is darned slow for 33's much less my 35's. The MV50 is probably ~2x faster or so than the ARB which is some indication of it's CFM in comparison.
 
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