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

93 high egts

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Old 11-14-2015, 09:55 PM
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Well I haven't found much help from looking t other posts so I'm going to post. Iv got a 93 5 speed with 140hp nozzles and a 40hp fuel pin 3500 gov spring and an hx35/40 hybrid turbo. It runs about 700 cruising on hwy but when I pass a slower vehicle it will get to 1600 by time I get in front of the vehicle. So my question is what's the next step to help keep my egts lower for a longer period of time?
 
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Old 11-15-2015, 08:09 AM
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that is a problem everybody has when they have lots of fuel. more air will help. but less fuel will too. if you keep it controlled for a short time like when you are passing a car and then get out of it that is normal.
 

Last edited by diesel pap; 11-15-2015 at 08:12 AM.
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Old 11-15-2015, 11:02 AM
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Just wondering if there was any way to get more air? Bigger intercooler or air filter ect.....
 
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Old 11-15-2015, 11:05 AM
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Better turbo. Don't even think about a hybrid if you want to safely use all or most of the fuel you can get with those parts.
 
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Old 11-15-2015, 11:21 AM
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So that's not a good turbo for what I got? Bigger exhaust or anything else to help?
 
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Old 11-15-2015, 02:00 PM
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i never have run them but twins will cool her down some.
 
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Old 11-15-2015, 03:27 PM
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How much for a decent set of twins?
 
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Old 11-17-2015, 02:42 AM
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I'd skip a tooth on timing (if it's stock) before anything else...should solve your EGT issues. 700 deg cruising says your injectors probably like more timing. I run two teeth skipped on mine, which is enough to create its own set of problems, but at one tooth you should be fine. What kind of boost numbers are you seeing?
 
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Old 11-18-2015, 10:22 AM
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What you have now and twins are two extremes on the turbo spectrum. I'd shoot for something in the mid-lower area. HX40, HE351, something like that.
 




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