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  #1  
Old 12-26-2016, 03:14 PM
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ken6x6 ken6x6 is offline
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Default Starting fresh - 1772 turbo diesel build.

There still seems to be interest in this turbo project so i'll start a new thread with the new turbo and hopefully no drama.

So I ditched the K03 for Garrett GT1241. this turbo is rated for engines from 400cc - 1200cc making the Kubota D640 a great match up. so far I have made a new adapter plate to mate the exhaust manifold to the turbo. the adapter includes the mount for the fan belt too. I have a new oil supply line made from 1/4'' copper. now i'm fighting with the oil drain line. on the old set up i used a 3/8 copper tube to a rubber hose to the drain in the engine block. this gt12 is pretty compact and the oil supply and oil drain from the turbo are both located on the bottom making running two lines next to each other a challenge. i've been looking into flexible steel tubing as an alternative to copper. although im unsure if the steel will bend enough for my needs. another option is silicone tubing but i do have to watch the heat from the exhaust manifold. its extremely close. also, does anyone know what the oil pressure of the d640 is at idle and WOT? i need to make sure i dont put to much pressure to the turbo. there are oil restrictors available if i need to reduce the pressure.

feel free to comment but lets make sure to keep it on topic.
Attached Images
File Type: jpg turbo bracket.jpg (21.2 KB, 463 views)
File Type: jpg gt1241.jpg (20.0 KB, 446 views)
File Type: jpg turbo mounted.jpg (18.3 KB, 449 views)
File Type: jpg turbo mounted 2.jpg (21.1 KB, 450 views)
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127 - 48'' deck + tiller.
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1872- 60" Haban
1772 turbo diesel- Iron rear + KW loader + backhoe + 3 point.
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  #2  
Old 12-26-2016, 03:57 PM
mortten mortten is offline
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Using copper tubing on a vibrating engine can cause it to work harden and crack. Steel line may be a better idea.
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  #3  
Old 12-26-2016, 04:33 PM
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jaynjeep jaynjeep is offline
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Ken,

Nice looking fabrication work!!

The oil pressure on the D640 in my 1782 can get as high as 80 psi when it is cold... after it warms up it is about 30psi at hot idle and 50 psi at full throttle when hot... hope this helps!
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Old 12-26-2016, 04:37 PM
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Not really sure about the oil pressure. I like braided steel line for oil pressure lines. That mounting flange is sweet! Looks good so far!
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  #5  
Old 12-26-2016, 04:52 PM
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way cool setup! Peaked my interest to do the same to my kubota
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Old 12-26-2016, 05:12 PM
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Quote:
Originally Posted by jaynjeep View Post
Ken,

Nice looking fabrication work!!

The oil pressure on the D640 in my 1782 can get as high as 80 psi when it is cold... after it warms up it is about 30psi at hot idle and 50 psi at full throttle when hot... hope this helps!
yes this does help, thanks for the info!
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127 - 48'' deck + tiller.
1512- 46" GT deck & bagger
1872- 60" Haban
1772 turbo diesel- Iron rear + KW loader + backhoe + 3 point.
Case 580CK
Ford 850
International TD-8E
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  #7  
Old 12-26-2016, 05:19 PM
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ken6x6 ken6x6 is offline
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i went with the copper pressure line for a few reasons. first off the line is about a 1/2'' from the exhaust manifold where it can get pretty hot. the copper is easy to bend around all the obstacles and the fittings are compression style so it makes it easy to connect everything. maybe once its all done ill go with steel and use the copper line as a template.
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127 - 48'' deck + tiller.
1512- 46" GT deck & bagger
1872- 60" Haban
1772 turbo diesel- Iron rear + KW loader + backhoe + 3 point.
Case 580CK
Ford 850
International TD-8E
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  #8  
Old 12-26-2016, 05:21 PM
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ken6x6 ken6x6 is offline
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hers a pic of the copper pressure line.

the wife got me the perfect boost gauge for Christmas.
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File Type: jpg copper line.jpg (23.9 KB, 434 views)
File Type: jpg boost gauge.jpg (19.6 KB, 434 views)
__________________
127 - 48'' deck + tiller.
1512- 46" GT deck & bagger
1872- 60" Haban
1772 turbo diesel- Iron rear + KW loader + backhoe + 3 point.
Case 580CK
Ford 850
International TD-8E
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  #9  
Old 12-26-2016, 07:03 PM
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It's such a short run I think the copper will work great. If you have really long runs it has to have a lot of clamps to keep from vibrating and cracking.

I wouldn't worry so much about the pressure to the turbo. More so the volume of oil. Any bigger than 1/4 and you should run a restrictor. Return doesn't matter as much the bigger the better or about double the pressure side. If you go with hoses at somepoint we ran 4AN pressure and 10AN return on the last turbo project we were working on. My buddy ran 3/16 brake line on his and with as much oil pressure the D640 puts out I think that should be sufficient to keep the turbo lubed. Just my 2 cents!

That guage is perfect, keep up the good work I'm glad you are keeping us posted!
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  #10  
Old 12-26-2016, 07:49 PM
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Ken,
Enjoying watching this build. Glad you sticking with it! I, for one, think you're talented.
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