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Old 10-07-2013, 12:15 PM   #51
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Re: Jacuzzi bus - a tribute

Quote:
Originally Posted by whitey
@PDbreske - I went straight from flight


Any tips on what methods we should use to cut the roof?
For cutting straight lines in sheet metal, I like to use a circular saw (the type meant for carpenters) with an abrasive blade on it. I find this method makes much nicer lines than torches or a saws all.
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Old 10-07-2013, 08:47 PM   #52
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Re: Jacuzzi bus - a tribute

Splish Splash, I was taking a bath. You are going to have some fun with your water machine.
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Old 10-08-2013, 02:07 PM   #53
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Re: Jacuzzi bus - a tribute

Lapeer! Awesome to hear from you man! I've read every post on every one of your hot tub threads. We learned a lot of stuff to make our life a lot easier. Much thanks.

We have four days left till the debut. So right now we are keeping things simple.

We are using the heater core to heat the tub. Last night we ran it at a 2k RPM idle with the heater core inside and a genny running the tub pump and heater. It raised the tub from 55 degrees to 103 in one hour. I was giggling like a little school girl.

We put a nice audio system in there. THousand dollars worth of equipment in a three thousand dollar bus haha.

I need to pick up a couple extra batteries. I'm not quite sure how to wire the extra ones into the battery bank but I should be able to figure it out.
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Old 10-08-2013, 02:17 PM   #54
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Re: Jacuzzi bus - a tribute

Quote:
Originally Posted by whitey
We put a nice audio system in there. THousand dollars worth of equipment in a three thousand dollar bus haha.

I need to pick up a couple extra batteries. I'm not quite sure how to wire the extra ones into the battery bank but I should be able to figure it out.
That seems reasonable I have a 7.1 dolby digital system in mine, with 2 12" infinity's in a sealed enclosure. It's fun

Wire the batteries in parallel. That will keep you at 12 volts. Unless you were just meaning where to put them. In that case you're on your own
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Old 10-08-2013, 06:46 PM   #55
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Re: Jacuzzi bus - a tribute

*edited to remove bad advice about batteries.*

However I think that a single brand new 8d size battery was sufficient for my needs. It is pretty much the same size as three separate group 31 batteries but without all the expense and complexity of multiple batteries in series. You can buy one of these at tractor supply or any alternator shop that sells batteries.

I toyed around with several battery configurations, including: separate battery banks charged from a single alternator, separate banks charged with separate alternators, connecting multiple batteries to the stock
Starting battery, etc.

In the end, what worked best for me was one giant starting battery, 8d size. I did my best to keep the party lights and stereo from running the battery down. In the event that the battery was discharged to the point the bus wouldn't start I would use the generator and a battery charger.

Realistically, anytime I ran the generator for the jacuzzi, I ran the battery charger unless the bus was running.

They sell some pretty nice computer controlled chargers at Walmart. You could go smaller, but I find 40 amps with 100 amp engine starting capacity is a nice compromise between price and function.

Where to connect the charger? I found it most convenient to open the bus electrical panel and connect the red charger lead to one of the large main power leads inside.

One more note.....

If you ever run out of fuel, before doing anything with the fuel system I like to connect the battery charger and let the batteries charge while I work at figuring out how to prime the fuel system. When you get ready to try to start the engine she spins real quick with those freshly charged batteries...at least for the first 30 seconds.
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Old 10-09-2013, 09:10 AM   #56
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Re: Jacuzzi bus - a tribute

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Others may disagree and think its too dangerous due to hydrogen off gassing, but you can put spare batteries on the floor inside the bus. The most logical place is just behind the driver above the stock bus battery. If off gassing is a concern you could build them into a box that was vented to the outside...
All I'm going to say is batteries produce hydrogen which is very explosive. Batteries do explode. The gas stinks.
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Old 10-09-2013, 12:33 PM   #57
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Re: Jacuzzi bus - a tribute

I just picked up an 8D battery and a charger, thanks for the tip.

We are gonna be using the heater core idea for the next week or so at least. Lapeer, are you saying that when you use the plate heater you leave it in the tub the whole time? With the coolant lines connected to it?
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Old 10-09-2013, 08:18 PM   #58
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Re: Jacuzzi bus - a tribute

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Originally Posted by whitey
I just picked up an 8D battery and a charger, thanks for the tip.

We are gonna be using the heater core idea for the next week or so at least. Lapeer, are you saying that when you use the plate heater you leave it in the tub the whole time? With the coolant lines connected to it?
No!

If using a plate heat exchanger I mount it someplace out of the way, usually in front of the jacuzzi near the floor. The exchanger has two sets of ports. One set for engine coolant, and the other set I plumb into the existing jacuzzi jets with a small pump. I think the best pump to use is one from an actual household boiler. In a perfect world this pump can be wired to an aquastat to maintain the proper jacuzzi temperature. In my world I would wire the pump to a switch and manually regulate the temperature. Depending on the flow rate and pressure you may be able to reroute one of your lines going to/from a jet in the jacuzzi and use the stock jacuzzi pump.

Or, for reliable 12 volt heating without running the generator, perhaps one of these 12 volt hot water pumps. I've never used one so I cannot comment on its performance.

http://www.amazon.com/gp/aw/d/B0075J6S3W

Here is a link to a well drawn yet very complex plate heat exchanger diagram: it may help, or it may cause more confusion.

http://www.centralboiler.com/Tech/C330.pdf

Hydrogen sulfide gas: i was wrong, and i gave bad advice earlie about batteries. It's a moot point as it sounds like you are using just one battery, but if others were inclined to mount batteries inside the bus they need to be vented outside for safety reasons. A vent through the floor would be best as hydrogen sulfide is heavier than air. It has an impressivly dangerous flammable range of 4.3-46%.
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Old 10-10-2013, 08:25 AM   #59
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Re: Jacuzzi bus - a tribute

haha thats what I was figuring. We toyed with the idea of grabbing the plate heat exchanger and plumbing it into the tub much like that PDF shows. At that point the tub wasn't even in the bus and we still werent sure if the heater core idea was going to work. Now that I know the coolant does an amazing job of heating the tub, I will end up picking up a plate heater in the near future.

Progress on the bus is great! The exterior is painted, its a dark gloss green. Eventually we plan on painting it up in an old WW2 bomber theme complete with pin up girls on the nose, aircraft type stencils, and maybe stencil a hottub on the side for every party we go to (like they recorded their bombing runs). That won't get done by saturday.

We framed the whole tub out yesterday and laid down laminate flooring. We have some 3M LED strips that can change to all sorts of different colors and lighting pattern. We picked up some plastic flashing material, glued the lights into the inside and then ran them all along the inside of the bus.

If I had to bring the bus out today it would still be awesome, but here are somethings were are hoping to get done in the next two days:

-Cut a thin rubber mat to shape and staple it down on top of the decking
- Pick up some car cup holders and install them in the decking around the tub using a hole saw
-Build a small enclosure with a removable top to house the heater core for now and the plate heat exchanger in the future
- Install the 8D battery and wire an inverter up
- Another couch/futon. We currently only have one and could use some more seating
- Build a simple bar in the front
- Install the plexi glass window. Its about 7 feet long and 3 feet high. I wanted to get 1/4" plexi but can't find any in the dimensions I need without a special order that won't be done in time. I am going to go with two 1/8" sheets for now, and replace them as they break.

Ill post some pics later today!
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Old 10-10-2013, 08:34 AM   #60
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Re: Jacuzzi bus - a tribute

Wow! Sounds like you guys did an impressive amount of work in a very short period of time.

I can't wait to see photos!
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