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

FIRST GENERATION CUMMINS

Old Aug 6, 2009 | 02:52 AM
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Default FIRST GENERATION CUMMINS

I have a 1990 dodge w350. It is completely stock. I am only 17 and need some help with my truck thats older than me. I just figured out how to adjust the fuel delivery through the injector pump (smoke screw...etc). I was wondering if there was anything else simple that i can do to gain HP?
 
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Old Aug 6, 2009 | 04:26 AM
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Other than turning screws on the pump, you can bump the timing, and grind the fuel cone. Other than that, that's all the free horsepower you can get.

Please, before you add more fuel, get gauges. At least a pyro.
 
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Old Aug 6, 2009 | 04:00 PM
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Originally Posted by peobryant
Other than turning screws on the pump, you can bump the timing, and grind the fuel cone. Other than that, that's all the free horsepower you can get.

Please, before you add more fuel, get gauges. At least a pyro.
Very good advice.... especially the gauges...
 
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Old Feb 4, 2010 | 06:52 PM
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You've also got the star wheel, (power screw). But yes, gauges are a must.
 
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Old Feb 4, 2010 | 10:44 PM
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yea like x4 on the guages, get a 366/3200rpm gov spring. it's only $20 so it's a good cheap mod, best $20 i ever spent on the truck!
 
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Old Feb 5, 2010 | 12:27 AM
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who sells a 3200 rpm spring ?????
 
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Old Feb 5, 2010 | 02:38 AM
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Price Quote - Request A Price - Diesel Bombers

Go into there and ask for a price quote on a 3200 governor spring (366 spring) for a Dodge first gen.
 
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