Advantages of 24v

[beetleswamp]

I'm too lazy to replace the starter and go through the trouble of converting to 12v, at least for now. I know there are some drawbacks of 24v but are there advantages?

 

[Recovry4x4]

Less amp draw and its cool.

 

[cranetruck]

Yes.

 

[ida34]

Being able to slave off other vehicles at all the military vehicle events when some kid turns your lights on while you are not looking.

 

[m16ty]

I've often wonder why the civilain world hasn't switched over to 24V especially in heavy trucks. 24V just turns a engine over much better and less amp draw on your electrical system.
I'm thinking the main reason tractor-trailers havn't switched is because they usually don't stay hooked to the same trailer. If some company came out with a 24V truck they could only pull a trailer with 24V lights so you would have to switch the bulbs on the trailers you pull. Problem is that there are milions of trialers still out there that are still 12V so if you took a load some place and dropped your trailer to pick up another one you would have to swap the bulbs before you could get on the road.

 

[CARNAC]

Re: RE: Advantages of 24v

Being able to slave off other vehicles at all the military vehicle events when some kid turns your lights on while you are not looking.

Concur, concur, concur.

Don't screw with your system. If you're worried about getting jump started, I had mine jumped by one of those 12 volt stand alone emergency jump start systems and it worked. Had to have that done when I had an alternator fry on me.

 

[86M10086.2L]

RE: Re: RE: Advantages of 24v

If you plan on installing a winch later, 24 volt winches are far superior to their 12v brothers, more power,less amp draw, longer work cycle. I'm keeping my 24 volt. Starters are easy enough to get as well as glow plugs and thats it for the 24 volts. every thing esle is just regular old 12v

 

[m376x6]

Okay

There are, as with any system, advantages and disadvantages.

 

[CUCVFAN]

I've often wonder why the civilain world hasn't switched over to 24V especially in heavy trucks. 24V just turns a engine over much better and less amp draw on your electrical system.
I'm thinking the main reason tractor-trailers havn't switched is because they usually don't stay hooked to the same trailer. If some company came out with a 24V truck they could only pull a trailer with 24V lights so you would have to switch the bulbs on the trailers you pull. Problem is that there are milions of trialers still out there that are still 12V so if you took a load some place and dropped your trailer to pick up another one you would have to swap the bulbs before you could get on the road.

With so many manufacturers using LED assemblies in trailers, this might not be too far off.

 

[JasonS]

I don't think that any modern trucks have dual 12/24V systems. This was done back in the old days when starter technology wasn't as evolved. Modern trucks and tractors work just fine with 12 volts.

 

[CCATLETT1984]

I've often wonder why the civilain world hasn't switched over to 24V especially in heavy trucks. 24V just turns a engine over much better and less amp draw on your electrical system.
I'm thinking the main reason tractor-trailers havn't switched is because they usually don't stay hooked to the same trailer. If some company came out with a 24V truck they could only pull a trailer with 24V lights so you would have to switch the bulbs on the trailers you pull. Problem is that there are milions of trialers still out there that are still 12V so if you took a load some place and dropped your trailer to pick up another one you would have to swap the bulbs before you could get on the road.

This is going to happen very soon in the industry, since you can run smaller wires to carry the flow, auto makers will probably skip 24v and go to 36 or 48volt systems, at those voltages its possible to run the air conditioning off of a electric motor effeciently for instance.

 

[CCATLETT1984]

I don't think that any modern trucks have dual 12/24V systems. This was done back in the old days when starter technology wasn't as evolved. Modern trucks and tractors work just fine with 12 volts.

24volt starters are better thats a fact, less amp draw (can use smaller wiring) plus they spin faster than a comparible 12volt starter.

The electrical systems of these trucks have nothing to do with how "evolved" the technology was at the time.

They have a split system because it was easier (cheaper) than converting the entire truck to 24volts, and the military had the requirement that these trucks be able to be jump started from any other military truck (they are all 24volts) so the split system was designed to give the best of both worlds. The only things that run from the 24volt side are the starter and the glow plugs that pull through a dropping resistor that steps the 24v down to 12v. The glow plugs are hooked up this way so they can get power when your batteries are dead and you are jumping from a 24v truck, otherwise you would have no way to power the glow plugs.

 

[Crash_AF]

I have a question about the glow plug system... has anyone tried to put the HMMWV 24v glow plugs in the CUCV and bypassed the resistor block to put 24V to the GPR? Would that be an effective way to eliminate the over-voltage burnout of the plugs?

Later,
Joe

 

[CCATLETT1984]

theoretically that should work fine, the hmmwv plugs use a different connector (easy to remedy that) but i dont see any reason that wouldnt work if your running a manual button to activate them (the stock controller wont handle 24volts)

 

[m16ty]

This is going to happen very soon in the industry, since you can run smaller wires to carry the flow, auto makers will probably skip 24v and go to 36 or 48volt systems, at those voltages its possible to run the air conditioning off of a electric motor effeciently for instance.

I've heard talk of that also. Only problem I see is that human skin insulation is only rated for 30 something volts. That means if you're working on a 36/48 volt car you better disconect the battery to keep from getting fried .

 

[CCATLETT1984]

your always supposed to disconnect it anyways, to protect the electronics.

 

[tmbrwolf]

Auto industry has been talking for a while going to 48V, with all the electrical gadgets now the 12V systems are reaching their limits. When I replace glow plugs in our shop I use 10V ones, the end is different (easily replaced) and they don't burn out as readily.

 

[CCATLETT1984]

Auto industry has been talking for a while going to 48V, with all the electrical gadgets now the 12V systems are reaching their limits. When I replace glow plugs in our shop I use 10V ones, the end is different (easily replaced) and they don't burn out as readily.

thats because the civilian plugs are actually 6volt (so they heat fast). The G070 plugs that the cucv takes are true 12v plugs.

 

[JasonS]

I don't think that any modern trucks have dual 12/24V systems. This was done back in the old days when starter technology wasn't as evolved. Modern trucks and tractors work just fine with 12 volts.

24volt starters are better thats a fact, less amp draw (can use smaller wiring) plus they spin faster than a comparible 12volt starter.

The electrical systems of these trucks have nothing to do with how "evolved" the technology was at the time.

They have a split system because it was easier (cheaper) than converting the entire truck to 24volts, and the military had the requirement that these trucks be able to be jump started from any other military truck (they are all 24volts) so the split system was designed to give the best of both worlds. The only things that run from the 24volt side are the starter and the glow plugs that pull through a dropping resistor that steps the 24v down to 12v. The glow plugs are hooked up this way so they can get power when your batteries are dead and you are jumping from a 24v truck, otherwise you would have no way to power the glow plugs.

I am not sure what trucks you are talking about. In more general terms, series parallel switches were once used to get adequate cranking power. Both 6/12 and 12/24 systems were employed. This is straight out of the literature of the fifties. I have yet to see any modern OTR truck or farm tractor with a series / parallel switch. I am not trying to argue that 12V is better than 24V. Rather, that modern 12V systems are entirely adequate for starting medium duty trucks. There was a lot of talk in the trade magazines a few years ago about moving to 48V systems. Lots of silicon was developed for a market that never materialized.

 

[Crash_AF]

theoretically that should work fine, the hmmwv plugs use a different connector (easy to remedy that) but i dont see any reason that wouldnt work if your running a manual button to activate them (the stock controller wont handle 24volts)

Does the controller see the same voltage that the glow plugs see? I thought the controller only handled switching the relay which would isolate the controller from the 24v.