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Old 04-22-2009, 10:12 AM   #341
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Re: Jacuzzi Bus IV

from what i've seen of the high amp alternators, the rectifier diodes that convert ac to dc are the weak link, the super high amp alternater mfg's take the diodes out of the alt. case and install multiple redundant 50A diodes on an external heatsink plate.
jason look under the hood of some of your life support units or check with the mechanics at the maintainence barn.
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Old 07-30-2009, 05:51 PM   #342
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Re: Jacuzzi Bus IV

Long time since I posted on this board! Well I am doing some electrical upgrades. In this sweltering Texas summer heat of 100+F, the inverter appears to be not quite up to the task of running the A/C. The A/C normally draws about 1.1kW but on really hot days, it can draw up to 2.5 times that, or about 2.7kW and some change. With added accessories, that pushes over the 3kW supply of the inverter and it trips off. All connections have been recently revamped. So I am pulling the old inverter out (as of last night) and putting this in tonight: http://www.theinverterstore.com/the-inv ... -front-rgb. A 5kW inverter should be more than I need and actually more than the ~4kW alternator can keep up with if drawn but oh well this is the closest output I could find. Just curious where I might find a higher-rated alternator?

Pesky oil leak on the detroit and will get it serviced. Remodelling inside soon. Adding seats, and making room.
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Old 10-12-2009, 07:27 AM   #343
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Re: Jacuzzi Bus IV

See updated shots at www.skylinelimo.blogspot.com

Yes that is Italian porcelain tile! It really is, but eh who cares.
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Old 10-16-2009, 06:58 PM   #344
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Re: Jacuzzi Bus IV

Some details are obvious, some aren't.

No more jacuzzi. Just wasn't serving the business like I thought it would. But it was fun fun fun, no doubt! Laid down 6x6 porcelain tile, on cement backerboard, screwed to the 3/4" plywood. Didn't use your standard thinset/grout combo. Used one of Bostik's transportation adhesives for the thinset, and one of their marine adhesive's for the grout. Would have preferred to use the marine adhesive as the thinset too, but it is pricey stuff, and one doesn't shop carefully, they can spend $20 on one 10.3 oz tube. For one tube! The thinset is significantly cheaper, isn't quite as chemical resistant, but is well within my comfort zone for the application. Their shear and adhesion strengths are almost identical. They break at 200% and 225% elongation, resp. I used about 75 tubes for the thinset, and 8 or 9 tubes for grouting. Adhesives came from www.neverseezproducts.com

Used laminate on the base of the seat benches and some rubber chrome wheelwell trim as accent between the black and silver laminate. Material came from www.decotonesurfaces.com

Added some lights for effect and connected to the new 5000W inverter. Looking at upping the amperage on the alternator a bit, but more importantly just have one on standby. Replacing the TV this weekend since I saw that the existing one had a crack at one of the screw mounts. Can't have that thing falling on someone's head! Will add a 48" blacklight fixture in the front marquee sign compartment.

Not touching the paint job! Wouldn't dare do that. The flames are perfect (way to go Jason!). They have a Tim Burton-esque appeal to them, in my opinion.
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Old 10-19-2009, 04:00 PM   #345
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Re: Jacuzzi Bus IV

Jason, where'd you get that original 165-amp 24V alternator? I'm checking with a local shop down here in Austin and I'm doubting that they will be able to help after talking to them. I want to have an extra, in case of emergencies. Plus, I think the original one is starting to degrade in performance a bit. At idle with nothing turned on inside, a steady 25.1 volts at the batteries. When I rev the engine, the battery voltage goes up to 27.5. When I turn everything on at idle, voltage drops steadily until the inverter shuts off. When I rev periodically with everything on, the voltage seems to try and stay right around 25. I'm looking to somewhat mitigate this problem with a high idle switch adjustment. But I also want to find another high output alternator...
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Old 10-19-2009, 06:56 PM   #346
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Re: Jacuzzi Bus IV

I dont know much about engines and their components... But, Have you tried looking the net with "165-amp 24V alternator"? I just tried it on google and found this:

http://www.mascostartersandalternato...oduct_list&c=3

It doesn't say what the volts are, and I really have no idea of how to figure it out, so your on your own there. But its a attempt at help. And, they have a 200amp Alternator, so if its the right type, you might be able to upgrade...

Here is another site that might prove helpful... (searched for 'High Amp 24v Alternator')
http://www.emarineinc.com/products/a...lications.html
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Old 10-20-2009, 09:45 AM   #347
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Re: Jacuzzi Bus IV

sojakai, yeah I've seen the emarine site. I'm looking for a lower cost alternative. Today I'm going to call the original supplier of the 165-amp alternator I have now.

On a completely separate subject, has anyone ever used Bus-Kote? http://www.hytechsales.com/prod2150.html
Is it legit? If ceramics are really in it, this sounds promising. Would put on the roof above the average line-of-sight on the roof's contour so it's not real obvious...
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Old 10-20-2009, 01:27 PM   #348
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Re: Jacuzzi Bus IV

eBay is the place to go for the alternator if your parts store can't come up with anything though they should. The condition you're describing with the alternator not keeping up at idle is NORMAL. You could try changing the pulley ratio to get it to speed up a bit at idle which would help. Modern cars are the same with with their heated seats, defrosters front and rear, and whole other myriad of electronic devices. The battery warning light and voltage gauges are now computer controlled to keep them off/reading normal under what the manufacturers deem to be "normal discharges." An older alternator with just a regular idiot light or voltage gauge would read discharge every time you stopped. Your bus with its high draw is no different. You can probably get the alternator and batteries tested just for piece of mind though. It shouldn't cost a penny at the parts store.
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Old 10-20-2009, 02:43 PM   #349
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Re: Jacuzzi Bus IV

Yes I will be testing the batteries/alternator to see if any damage has been done when the voltage was pulled down very low (21.5V!) recently. I will be measuring diameters of the pulleys tonight and see where I stand for pulley rpm...if the info wasn't posted by Jason during initial construction, will check. I've spoken to the original supplier of the 165A 24V alternator today and will be ordering it, if not the 200A he can get. Shoot, maybe I'll get both. Either of them produce substantial power starting around 1800rpm according to the supplier. Interesting info you say about the modern cars; didn't know that! Eventually I will bridge this operational gap I'm having at idle.
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Old 10-22-2009, 05:50 PM   #350
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Re: Jacuzzi Bus IV

i don't know the pulley diameter or the idle rpm of the engine. However, there is a much larger pulley on the crank than on the alternator, so the alt is spinning faster than the engine. Just googling real quick, it looks like that engine potentially idles really slow....like 500 rpm.

The smaller the pulley on the alternator, the faster the alt will spin. the only problem is that the smaller the pulley the less surface area for the belt. Too small of a pulley will tend to make the belt slip (squeal) I don't exactly remember the setup, but i don't think a larger crank pulley is an option. The larger the crank pulley, the faster the alt will spin.

most alternators can spin upwards of 8,000 rpm. If you were able to utilize the proper pulley size, you could spin the alternator 4 times faster than engine speed. If the crank pulley is 4 times bigger than than the alternator pulley, you would do exactly that.

Alternatively, I think you could utilize 2 alternators together on the same battery bank. Ask alternator guy at chapmans what he thinks about that idea. Some pickup trucks come from the factory with twin alternators for use with the "snow plow package"
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