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D21 HX-50 turbo
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Joined: 01 Feb 2015
Location: NJ
Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC D21 Quote  Post ReplyReply Direct Link To This Post Topic: D21 HX-50 turbo
    Posted: 01 Feb 2015 at 5:24pm
HX-50 turbo on a D21 turning around 3,000 rpm. What would need to be done to the fuel system and clutch? Is this possible without going inside the engine. It is a military genset engine.
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Joined: 12 Sep 2009
Points: 21401 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb 2015 at 6:32pm
The Cummins/Holset HX-50 needs to have the smallest exhaust housing, which I think is a #19. Your fuel system needs to be at 300 cc's or MORE. 3000 RPM is better than 2,900 RPM. Intercooler with cool or ice water flowing thru it would also be a benefit. Eventually you'll probably need to do something with the head gasket/fire rings. Mine used to run 45 lbs of boost with a DB450 pump @325 cc's fuel with 4 hole .020" injectors set at 2500-2800 psi. The basic engine was bone stock. Stock 4-pad clutch disc with six extra springs inside of six existing springs in the stock pressure plate.
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Joined: 01 Feb 2015
Location: NJ
Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC D21 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2015 at 6:36am
Thanks DrAllis I was also wondering about a better exhaust manifold. I heard about making spacers and using a dt414 manifold. But it's not a center exit for the turbo. Could spacers be made to use a Case 1170 manifold?
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Joined: 12 Sep 2009
Points: 21401 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2015 at 7:06am
Don't have any idea about the J.I.Case manifold. I used the D-21 manifold with a 1 inch spacer plate and a welded in divider wall to keep the flows split....1-2-3 and 4-5-6.
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Joined: 13 Sep 2009
Location: Walnut IL
Points: 5064 		Post Options Post Options   Thanks (0) Thanks(0)   Quote injpumpEd Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2015 at 12:54pm
I have set up many fuel systems just like what you would need. At the point you're at, the stock center dump exhaust will be just fine. 
210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Joined: 12 Sep 2009
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Points: 676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Slade (TN) Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2015 at 7:21pm
I have a 426 intercooler if you're interested in adding one

Slade
615-542-6999
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Joined: 01 Feb 2015
Location: NJ
Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC D21 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2015 at 8:41pm
Injpumped I would like to talk to you about the fuel system. So I can find out how far I can go and what it will cost.
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Joined: 01 Feb 2015
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC D21 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2015 at 8:42pm
Can't run an intercooler with my rules.
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