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Old 08-02-2014, 09:51 PM   #1
Skoolie
 
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Location: Grays Harbor County, Washington
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Year: 90
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Second time around

I'm Back at last!!!!
I am naming this thread Second time around till i come up with a name for my new bus. My first bus was a 1984 Bluebird all american diesel pusher. I chronicled that project in a thread called "Scotts First Bus" and had just finished the major deconstruction and was starting to build back up when health issues forced sale.
This was a few years ago and health has gotten a lot better and i am hoping to hook back up with some old friends here and make some new as i start on the new project.

New Bus is 1990 international with blue bird body. It is powered by Navistar straight 6 turbocharged, auto trans.
I will take some pics and post them along with more info soon.

Did anyone here ever figure out what happened with Smitty? He was a HUGE source of ideas and guidance to me, along with a lot of others, in my first build and hope he is well where he went.

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Old 08-02-2014, 10:15 PM   #2
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Re: Second time around

Welcome back! Smitty was abducted by aliens a long time ago....apparently. Havent seen him in a long time.
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Old 08-10-2014, 08:21 PM   #3
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Re: Second time around

Got the battery charged up today and tried to start. CLICKCLICKCLICKCLICKCLICK!!!!
Well................., that's annoying.
Pulled out starter and will take it in and get rebuilt
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Old 08-10-2014, 08:50 PM   #4
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Re: Second time around

Kind of think it is still the battery--have you done a load test on it? Before you shell out good Skoolie money on a rebuilt starter maybe you'll get lucky and only need a battery.
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Old 08-11-2014, 12:15 AM   #5
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Re: Second time around

Welcome back to the mad, mad world of school bus conversions. You are starting with more of a knowledge foundation than many of us on this forum, since you have some previous experience. The people on this forum are great and give great advice. My conversion would not be nearly as great without the sound ideas and advice from the fellow skoolies on this site.

Again, welcome back. Hopefully you remember, pictures, pictures, pictures!!!
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Old 08-12-2014, 12:18 AM   #6
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Re: Second time around

yes i remember .... pictures pictures pictures. I know the starter needs a rebuild, it feels like there is gravel in it when you turn it by hand. i am definitely looking at new batteries, the one that is in there is huge, old and i am not sure it is providing the cranking power i need. i went and looked at two logging truck batteries today at $99 a piece. payday can't get here quick enough.
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“Twenty years from now you will be more disappointed by the
things that you didn't do than by the ones you did do. So throw off
the bowlines. Sail away from the safe harbor. Catch the trade winds
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Old 08-19-2014, 08:23 PM   #7
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Re: Second time around

Ok, got some pics today. Still waiting on funds for two new batteries.
Attached Thumbnails
Bus Frnt corner.JPG   Bus Front.JPG   bus2.jpg  
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the bowlines. Sail away from the safe harbor. Catch the trade winds
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Old 08-20-2014, 07:40 AM   #8
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Re: Second time around

RE-Welcome
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Old 08-20-2014, 06:22 PM   #9
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Re: Second time around

Success!!!
After sitting for four years beside the bus barn where i bought her, she is now sitting at my house. New batteries, rebuild starter and fresh fuel and filters.
All i had to do was stroke her ego a bit, appeal to her vanity (tell her if i had to tow her home she would end up as a chicken house) and pat her on the butt (close back door fully) and she fired right up and ran smooth. Now the fun starts.
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“Twenty years from now you will be more disappointed by the
things that you didn't do than by the ones you did do. So throw off
the bowlines. Sail away from the safe harbor. Catch the trade winds
in your sails. Explore. Dream. Discover." Mark Twain
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Old 11-13-2014, 08:01 PM   #10
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Re: Second time around

Trying to find new headlight and bezel. Not much luck online so will start looking in wrecking yards.
__________________
“Twenty years from now you will be more disappointed by the
things that you didn't do than by the ones you did do. So throw off
the bowlines. Sail away from the safe harbor. Catch the trade winds
in your sails. Explore. Dream. Discover." Mark Twain
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Old 11-15-2014, 08:18 AM   #11
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Re: Second time around

Call school bus sales in Waterloo Ia. They have a great parts department.
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Old 11-15-2014, 09:07 AM   #12
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Re: Second time around

I was going to suggest you not purchase two large (I assume 8D batteries) but just one Group 31.

For your purposes two 8D batteries is waaaaay too much battery just to start your bus. School buses have two large batteries because they spend so much of their service life at idle with a full electrical load--multiple heaters/defrosters/blower fans, muliple lights (interior, exterior, 8-way, stop paddle), radios, cameras, etc.--that they need the reserve capacity to keep from going dead every morning. Even with a 250 AMP alternator it is a hard push to keep up with the electrical load at idle.

When you start and run your bus you won't be using nearly as much electrical load. Unless you want to run roof top A/C units off of an invertor while running down the road most of the time you won't come close to using more juice than what the alternator is putting back into one Group 31 battery.

On the house side you will need a lot more battery storage capacity. But you will want deep cycle batteries that are on a seperate circuit from your start battery so you won't ever end up with a dead start battery.

By the way, don't try to use deep cycle batteries as start batteries. They are not designed to push out huge loads all at once, the sort of load a starter motor puts on a battery. That sort of a load on a deep cycle will kill a deep cycle battery. Much in the same way using a standard battery as a house battery will kill a standard battery. Standard start batteries will not stand up to continuous cycles of taking the battery to nearly dead and filling it back up again.
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Old 11-15-2014, 11:16 AM   #13
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Re: Second time around

Thanks for the battery input and the parts idea.
I bought two because i got a killer deal and will be adding all kinds of electronics later on.
__________________
“Twenty years from now you will be more disappointed by the
things that you didn't do than by the ones you did do. So throw off
the bowlines. Sail away from the safe harbor. Catch the trade winds
in your sails. Explore. Dream. Discover." Mark Twain
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Old 11-16-2014, 06:44 AM   #14
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Re: Second time around

Quote:
Originally Posted by cowlitzcoach
I was going to suggest you not purchase two large (I assume 8D batteries) but just one Group 31.

For your purposes two 8D batteries is waaaaay too much battery just to start your bus. School buses have two large batteries because they spend so much of their service life at idle with a full electrical load--multiple heaters/defrosters/blower fans, muliple lights (interior, exterior, 8-way, stop paddle), radios, cameras, etc.--that they need the reserve capacity to keep from going dead every morning. Even with a 250 AMP alternator it is a hard push to keep up with the electrical load at idle.

When you start and run your bus you won't be using nearly as much electrical load. Unless you want to run roof top A/C units off of an invertor while running down the road most of the time you won't come close to using more juice than what the alternator is putting back into one Group 31 battery.

On the house side you will need a lot more battery storage capacity. But you will want deep cycle batteries that are on a seperate circuit from your start battery so you won't ever end up with a dead start battery.

By the way, don't try to use deep cycle batteries as start batteries. They are not designed to push out huge loads all at once, the sort of load a starter motor puts on a battery. That sort of a load on a deep cycle will kill a deep cycle battery. Much in the same way using a standard battery as a house battery will kill a standard battery. Standard start batteries will not stand up to continuous cycles of taking the battery to nearly dead and filling it back up again.
cowlitz, you hit on something i had never thought about! running inverter off chassis batteries whille driving. particularly running a window a/c while driving. man, that is good stuff! i have a 180a alternator and dual 31 series batteries, that should work fine if the draw doesnt damagee the alternator????????

thanks man
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Old 11-16-2014, 08:51 AM   #15
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Re: Second time around

If you intend to use an invertor while going down the road you need to do an electrical inventory.

Figure out your 110-VAC draw to determine which size invertor you need.

Once you figure out which size invertor you will need you will be able to determine how many amps of 12-VDC you will need.

With 180 amps you should be good for a lot of amps of 110-VAC.
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Old 11-17-2014, 01:08 PM   #16
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Re: Second time around

When your looking at an inverter the amps ratio is 5 to 1 for 24 volts 2.5 to 1 for 48 volts and 10 to 1 for 12 volts, then you need to consider your conversion efficiency of the inverter. Most of the good ones today are in the 90% range and some even higher.

Have the fun

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Old 11-23-2014, 01:51 PM   #17
Skoolie
 
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Re: Second time around

Wish I had studied electronics a little bit before i took on this project.
My plan is to build a mount and install a second alternator on the engine with the purpose of charging extra batteries and inverters.
I will build the mount and find someone knowledgeable in electronics to wire it up.
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the bowlines. Sail away from the safe harbor. Catch the trade winds
in your sails. Explore. Dream. Discover." Mark Twain
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Old 11-23-2014, 02:41 PM   #18
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Re: Second time around

These days there are high output alternators specifically designed to replace multiple unit installations. They are commonly used on ambulances, EMT trucks & such. I just ordered a 250 amp unit I will connect to a switching device that will automatically take are of both start & house batteries. You can even run a 110 a/c unit over the road. They aren't cheap but save space under the hood and require no custom made brackets, idlers and special belts.
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Old 11-23-2014, 09:53 PM   #19
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Re: Second time around

Where did you buy it? would be a good solution for me.

Quote:
Originally Posted by Tango
These days there are high output alternators specifically designed to replace multiple unit installations. They are commonly used on ambulances, EMT trucks & such. I just ordered a 250 amp unit I will connect to a switching device that will automatically take are of both start & house batteries. You can even run a 110 a/c unit over the road. They aren't cheap but save space under the hood and require no custom made brackets, idlers and special belts.
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things that you didn't do than by the ones you did do. So throw off
the bowlines. Sail away from the safe harbor. Catch the trade winds
in your sails. Explore. Dream. Discover." Mark Twain
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Old 11-24-2014, 12:33 AM   #20
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Re: Second time around

How big is your current alternator? Your starter battery and your deep cycle batteries can be tied together. You will need a disconnect for the starter battery to avoid draining it when parked. You will need a disconnect for your deep cycle batteries to remove them from the circuit when starting the bus. While the engine is running, you can connect both sets of batteries to charge everything. I'm sure you can come up with a more "automatic" solution, as this will require manual switching, but this is very cheap. Be sure to fuse the link between your deep cycle system and the bus's engine 12V systems and size your cable to handle the charging current from the alternator. (no fires)

A more expensive, but easier for all in your family to understand is a rotary switch that handles all battery connections.

http://www.delcity.net/store/Battery-Se ... h/p_789171
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