Budget Portable Air 2015

[MOguy]

Starting the compressor before connecting to the tire prevents the fuse blowing, as mentioned above.

Also, the lower the voltage , the higher the current draw, so I keep the engine at high idle while filling and the wires stay much cooler.

I have a hand throtlle I can lock in and found my speeding the engine idle slightly it runs much faster but I haven't noticed heating more. It might though. By the time I get done airing up alll my tire the pump is pretty hot no matter what I do. I do check t make sure the wires do not heat up.

 

[Ducky's Dad]

By the time I get done airing up alll my tire the pump is pretty hot no matter what I do. I do check t make sure the wires do not heat up.

The compressor temp is only loosely related to the electrical issues. Compressing a gas causes its temperature to rise, reducing the pressure causes the temperature to drop. The compressor temp you notice is mostly coming off the cylinder and cooling fins, completely normal. ARB compressors are known to run pretty hot, don't know about the MV50.

 

[MOguy]

The compressor temp is only loosely related to the electrical issues. Compressing a gas causes its temperature to rise, reducing the pressure causes the temperature to drop. The compressor temp you notice is mostly coming off the cylinder and cooling fins, completely normal. ARB compressors are known to run pretty hot, don't know about the MV50.

Like you said anytime you compress air it will heat. Allot of friction is generated.

 

[carbon60]

Voltage will be higher at higher idle, this current draw will be lower and you're less likely to blow a fuse.

 

[MOguy]

Voltage will be higher at higher idle, this current draw will be lower and you're less likely to blow a fuse.

exactly. I run my motor about 1,000-1,100 rpms or so. If I had an auto and had it in park the motor would run about 900 rpms, I have a stick. Mine is hard wired and there may be some lost of power because of the length of the cord.

 

[RoyJ]

The need for RPM highly depend on your alternator(s).

If you're driving a modern diesel with dual 220-amp alts, and putting out 300+ amps at idle, I doubt you'll have to touch the throttle...

Even on my Hemi 1500 with a single 180a alt, an MV-50 sized compressor doesn't drop the voltage at idle. An Oasis, on the other hand, even with a diesel you'd want some revs!

 

[MOguy]

The need for RPM highly depend on your alternator(s).

If you're driving a modern diesel with dual 220-amp alts, and putting out 300+ amps at idle, I doubt you'll have to touch the throttle...

Even on my Hemi 1500 with a single 180a alt, an MV-50 sized compressor doesn't drop the voltage at idle. An Oasis, on the other hand, even with a diesel you'd want some revs!

Thats a good, point. I have Jeep with a 115 amp alt.

 

[carbon60]

I think my FZJ80 has an 80A.

 

[BigSwede]

My Trooper has a 75 amp alt I think, but it has never been a problem for me. Heck, I generally don't even run the engine while I air up, the group 31 Sears Platinum battery I have doesn't even break a sweat running the compressor, but maybe the compressor itself would be happier with the engine running.

I have 35x12.5x15 tires that take a lot of volume to air up, so I upgraded to this http://www.amazon.com/Industries-MV...B04JVNFY&dpSrc=sims&dpST=_AC_UL160_SR160,160_
which for all intents and purposes is nothing more than two MV-50s screwed together. Cuts my air up time in half.

 

[RoyJ]

Heck, I generally don't even run the engine while I air up, the group 31 Sears Platinum battery I have doesn't even break a sweat running the compressor

Is that one of those pure lead AGMs made by Odyssey? If so, you certainly have nothing to worry as they're rated to 80% depth of discharge!

With my starting battery, I don't feel good draining them too much, especially if I air up two trucks.

However, for longer trips I have my dual Trojans with 225Ah @ 12V.