Technical Anyone running a 12v AC system.

Well instead of running a AC compressor, I see all the normal Chinese places selling units 12v AC compressor kits. Which seems like a much better option than redoing my belts. Plus worst comes to the worst it's Easyier to grab a bigger alternator messing with a AC compressor.

 

I’m confused.

 

I run 12v ac but your post is confusing. What exactly is it you’re asking ?

 

Ok you can get ac systems which run from a 12v powered compressor. Instead of belt driven

As a example

https://a.aliexpress.com/_mM9qt0U

 

So your vehicle is 12 volts, right? And you want to add air conditioning to it?

Please help us understand what you are trying to do.
I could go on, but maybe you can provide information that will yield some help.

 

Wait a bit, are you saying the compressor has a built in 12 volt motor?

 

So with a car like a Roadster where there isn’t much room available in the engine compartment or you don’t want the ac compressor seen
you could mount it in the trunk and keep the engine compartment clean

 

Okay, read the info on it. Do you realized what size wire will need to be run to carry a 50 amp load? Then what size alternator will be needed to keep up with a (possible) 50 amp draw?
I think I would leave that unit overseas, get a few brackets, get a few belts and do it as it’s been done for oh so many years.

 

I think they do not have the capacity needed to cool a car interior. I think they are big enough to be supplemental, at about 6000 BTU, but an already hot car needs closer to 15000-20000 BTU's on a hot day. Vintage Air has evaluated these things in the past and decided not to pursue it because to get the job done the alternator needs be so big, or 2 alternators would be needed. I'm no A/C expert, maybe the technology has advanced.

 

Not a big cable at all 8ga should do. A 800wrms amp will draw that. Let's say I simply buy a 4ga amp wiring kit.

I have a 454 BBC engine is big, room is tight plus it's easy to find a 120A alt if required for motor.

I believe a few new cars actually use electric compressors these days.

While I agree it's likely not as good as engine driven unit.

I do have 2 York 210's here but there massive, while saden or similar smaller comps exist.

 

Yes I've read that article. Which is 5years old and I'm wondering have things moved forward. My rig uses next to no power (I should tong and measure it) but yes btu would be a concern.

 

Best of luck, please come back and tell us how it works out.

 

Can you explain “wrms “? I know rms (root mean square) is that thing ie watts x voltage?

 

Teslas have a/c and to the best of my knowledge they don't have an engine.
I don't care how it works. We don't talk about that here anyway.

 

Welcome to the HAMB.
Tell us more about your traditional hot rod or custom.

 

Electric and hybrid cars with A/C are using high voltage systems for their A/C compressor. In 2011 the Ford Fusion Hybrid used a 240volt compressor.

 

Watts RMS. Basicly its a more accurate way of giving out put of the amp.

Audio is just a AC sinewave.

It's also like saying your 110v power point is 170v technically it is. But that's peak to peak.

Also most head units are 4 x45w but likey it's closer to 4 X 15wrms

Also if it helps my Harley has 2 X 800wrms amps running 4 speakers so it's not crazy power (in a car)

 

I've just purchased it so I'm very much in the stage of fix every little thing, let's make it's the best and baddest rig arround.
This will die down quickly AC may or may not get done and I'll work on it as I please then get a sudden bust of movation then do some more.

It's a 1927 ford tudur rat rod, good paint not rust rod or anything like that.

454 big block, th350, 9" nothing to crazy at the moment, but the seller has also sold me a 8/71 blower kit minis carbs, alloy heads, cam. This will likely go on under driven it and hope my th350 lasts while I look for a beefed up th400.

But this requires exhaust as well, plus a few other things. Likely be 500rwhp with oodles of tq. Overkill likely.

It's nothing flash just a good cruiser that I'm hoping to make my own.

 

Like I said, we don't talk about that here.

 

18 wheelers are using 12 volt compressors to run air for the cabs. My son in law is in the process of putting one in his camper. We tested it last night with a 12 v battery. Throws out a lot of cold air.

 

To answer the question "Anyone running a 12v ac system", it appears the answer is no. This question pops up pretty often, and we have the same discussion, and we never hear back from the person who asked.

So you're on your own, please report back how it works or doesn't work, then we'll all know the answer.

 

As said before, hybrids and electric cars use electric a/c. Most of which are three phase AC motors…..

 

There was a guy on here a while ago asking the same thing about his Lasalle, he wanted to hide the compressor in the trunk. Basically the consensus was that it won't work due to the power requirements on the electric side just to run the compressor, it needs about 5 hp or so to turn it with the system charged. Just run it down low on the engine and make your life easier.

 

Watt RMS is supposed to be actual watts. In audio equipment there's a bunch of ways to get inflated numbers to make equipment seem better than it is. Just one example, if you compare a pure sine wave signal with a square wave signal of the same peak voltage, the square wave produces twice the power. That's twice the power output from the amplifier just by changing the sound you run through it. Of course, square wave isn't a common signal in sounds you want to listen to, so it's more of a theoretical number, and the amplifiers power supply may not even be able to supply that much power for any length of time, so... Just one of many ways to "honestly" rate audio equipment to get more impressive numbers. Audiophile audiophoolery.
Just like horsepower numbers can be fiddled with - power att the wheels vs. flywheel, SAE vs. DIN...

 

There is NO SUCH THING as rms watts. Watts are watts, period.
https://www.n4lcd.com/RMS.pdf#:~:te...n,is Average Power and it's measured in Watts.

 

The company I was leased to had several of those 12 volt auxiliary units in their company trucks. They would run about 8 hours on a bank of three deep cycle batteries before they shut off. The drivers I talked to that had them said they wouldn’t cool the entire cab, only the bedroom with the curtain closing the rest of the cab off, and they weren’t really cold, more just cool, but better than nothing. The truck had to run at least 10 hours to recharge the batteries. Even in a car as small as a T Tudor, I doubt it would cool the car as much as a Vintage Air mini unit would. They are pretty bulky units also that would be hard to mount. I doubt a single battery could run one very long and it would take a huge alternator to try and keep up. Maybe the ev car systems are different, I don’t know.

 

the EV car systems are different...there is a lot more electric power available, at a much higher voltage.

 

There are no rules that says the evap needs to be under the dash.
Lots of rides had the evap in the rear.
Have no clue about these 12v stand alone ACs but I wouldn’t compare them to what you see on a modern EV or hybrid.

 

his profile says 1927 ford tudor rat rod