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S-10 Kubota Diesel Conversion

Old Nov 20, 2012 | 01:17 PM
  #141  
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Here's my setup with the single crank pulley, and the vacuum and PS pumps running off of the alternator. It was necessary to use an idler to push the accessory belt down so it would clear the intake piping. A machinist friend is adapting a 3 pulley crank set from a Nissan for me though. Once that is done, I'll be converting to hydroboost, ditching the vacuum pump, and running the power steering directly off of the crank.

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Old Nov 21, 2012 | 06:13 AM
  #142  
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That looks pretty good. I dont have to many machinist connections so most likely I will have to use something like that. Where did you get the double alternator pully? Also FTE do you have any pictures that you wouldnt mind sharing? Thanks for all the input, you all are great. The brainstorming is tremendous
 
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Old Nov 21, 2012 | 10:04 AM
  #143  
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No problem! We're all figuring this out, so it's great to see what everyone comes up with.

I got the double pulley from Ebay, my Jeep uses a Denso alternator, which has a pulley that sets back into the housing a bit. I tried a pulley from a wrecking yard, but it wouldn't work, so I had to order this one for like $12. If your alternator can take a flush pulley, just go to your closest Pick N Pull/U Pull, etc and grab whatever double pulley you can find. This one is larger than the original pulley, so it doesn't turn the alternator as fast as I would like. I'll be getting a smaller pulley when I change my setup.

Alignment has been a real pain, especially with the idler. It seems that however I change things around, the belt wants to push outward away from the engine. I have the idler staggered to compensate, but I think I'm going to see a lot of belt wear in this configuration. The stamped pulley on the power steering pump is also a little out of true, so I may order a billet pulley for that later if it still bothers me after I change the crank pulley.

I can help with the pics of FTE's power steering/vacuum pump if he would like.
 
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Old Nov 23, 2012 | 07:18 PM
  #144  
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Sure, you can post the pix for me, thx.
 
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Old Nov 27, 2012 | 10:14 AM
  #145  
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Originally Posted by FTE
Sure, you can post the pix for me, thx.
Here's the pic of FTE's PS/Vacuum pump setup.

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Old Jan 16, 2013 | 10:03 PM
  #146  
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I have an idea I am throwing out there to see where it goes. What if I run the WP, Alt and Crank with a V-belt but then attach a serp pully to the WP pully where the fan goes and use it to run PS, Vac etc
 
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Old Jan 17, 2013 | 10:16 PM
  #147  
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Originally Posted by dirtdigger1
I have an idea I am throwing out there to see where it goes. What if I run the WP, Alt and Crank with a V-belt but then attach a serp pully to the WP pully where the fan goes and use it to run PS, Vac etc
You can use belt combinations, shouldn't be an issue as long as you do it correctly.
 
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Old Jan 18, 2013 | 09:29 PM
  #148  
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Update: I finally figured out a way to make a Kubota injector pump produce more fuel. Basically it goes like this; the Denso & Zexel injection pumps used in the engines use Barrels and Plungers to produce their pressure. The plungers have a Helical Cuts at the top that meters the fuel as it is forced up and down by the cam. The plungers are manipulated (twisted) back & forth as the throttle is increased or reduced. The plungers ride in the barrels like a piston in a cylinder. The barrels are set at a specific position, further barrel #1 is preset (pinned) and cannot be adjusted, however 2, 3, & 4 can be moved, they are not pinned. This is where I was able make the change, I figured out a way to remove the pin and rotate the barrel #1. By rotating barrel #1 I was able to increase the amount of fuel it delivered to the cylinder. I then rotated the rest of the barrels to match. Note: (sounds easy but really very technical). Some of the guys in the 5.9 Cummins world call this “clocking”. When I put this pump back in my truck and drove it I saw a 50% increase in boost pressure, YEA HUGE INCREASE! My boost went from struggling to make 10 PSI to making 15 PSI with ease. The truck ran better than it ever has; it has surplus power and even sounds different, more of a diesel clatter now. It had so much of a power increase that I pulled it in and swapped the rear end from a 3.73 to a 3.42. I had purchased the 3.42 a year or so ago but was hesitant to swap it as I thought it would be too tall, well not now, if anything I need a 3.08 gear! I’ll post what it does to the mileage once I have some numbers.
 
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Old Jan 19, 2013 | 10:18 AM
  #149  
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hi kubotaman. I am interested in the clocking procedure. I had seen the helical cuts in other pumps. Do all inline pumps work the the same way. Did you take any pictures of the modification process
 
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Old Jan 20, 2013 | 10:15 AM
  #150  
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I'm working on another pump now, I will take some pics as I go and post them.

Originally Posted by dieselxj
hi kubotaman. I am interested in the clocking procedure. I had seen the helical cuts in other pumps. Do all inline pumps work the the same way. Did you take any pictures of the modification process
 
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