1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

91 turbo problem

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Old Mar 24, 2011 | 10:56 AM
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Default 91 turbo problem

i have a 91 w250 5spd 4x4 non intercooled 210000 miles my turbo was rebuilt wroung the guy i bought it off of didnt balance it so i have a 1994 turbo for a intercooled truck thats in great shape if i clock the turbo and use new boot then will i jack up my motor im not new to deisels on working on them but i dont know much about performance and swaping stuff out any input is appriciated
 
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Old Mar 24, 2011 | 01:02 PM
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your 91 had an hc1 with a 18cm eh housing and that one from the 94 is a bigger hx40 i think. will at least need a down pipe with the hx40 ex flange and you might have to modify your intake too.
downpipe: Source Automotive Performance Diesel
 
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Old Mar 24, 2011 | 01:08 PM
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i have machine shop capabilities at were i work so i am going to modify it to make it work i would buy the intercooler and piping but im on a very limited budget.
 
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Old Mar 25, 2011 | 06:35 AM
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Originally Posted by Mendomotox
your 91 had an hc1 with a 18cm eh housing and that one from the 94 is a bigger hx40 i think. will at least need a down pipe with the hx40 ex flange and you might have to modify your intake too.
downpipe: Source Automotive Performance Diesel
It's an HX35. 12cm2 exhaust housing, and I think a 54mm compressor wheel, if it's stock.
 
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Old Mar 25, 2011 | 08:52 AM
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you are right i have been doing more reearch if i dont run the intercooler then will the 94 turbo hurt anything i just want to make sure it wont jack it up i have to drive this truck to work everyday and i cant have much down time
 
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Old Mar 26, 2011 | 04:50 PM
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you'll b alright without the intercooler. EGT's would suffer if it were an intercooled truck running without an intercooler but given the fact the truck is non intercooled with a smaller turbo; throwing a "larger" turbo on cant do anything but lower your egt's anyways, you should see some higher boost and reliability wont be an issue. enjoy
 
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Old Mar 29, 2011 | 08:30 AM
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thanks for the info i will be putting the turbo on and seeing what it will do the old turbo wont spool up now and is blowing oil into my intake tube
 
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