New Cummins on budget - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 03-02-2007, 06:16 AM Thread Starter
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New Cummins on budget

Hi,
I finally got a Cummins to complement my Mercedes diesel. Anyway, I was just wondering what you guys suggested for very low budget mods (up to about $500 to start out with, definately more down the road). It is a 90 Dodge 5.9 4x4 auto. And I'm not sure how much horsepower I'd like to get...maybe around 300?

thanks,
Joe
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post #2 of 5 (permalink) Old 03-02-2007, 01:51 PM
 
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I've had 2 1990 W250's. Bought 1 new a 5 speed and 1 used which was an auto & the transmission & torque converter were the weak link in the system. The converter stall speed was way to high to handle much more hp, installing a better converter would be a place to start but then the transmission would need to be upgraded to avoid failure. Mine never broke but then the engine was stock and it was a commuter only.
Your truck has 3:07 gears & no OD so the transmission is working harder to move and accelerate the vehicle. I’ve had to use low range to just get out of a small ditch because of the high stall converter. The vehicle just sat there at full throttle with no wheel spin in 4 HI.
My suggestion would be to first build the transmission to handle the power you eventually want to produce.
My opinion
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post #3 of 5 (permalink) Old 03-07-2007, 03:35 AM
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The best thing to do with any turbo charged engine is to let it breath better (Intake) and get a less resistant exhaust. If you do not mind the noise, a straight exhaust would be best. With the mechanical rotary injection pump, there are a few mods you can do for cheap but also you should invest in a few gauges to monitor engine functions.....

1991 cummins ctd reg cab
2011 VW Jetta 2.0
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post #4 of 5 (permalink) Old 03-07-2007, 03:40 AM
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This link is very helpful in everything you need to know about tuning you mechanical rotary injection pump.
http://www.dodgeram.org/tech/dsl/mor...r/Power_ve.htm

1991 cummins ctd reg cab
2011 VW Jetta 2.0
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post #5 of 5 (permalink) Old 05-08-2007, 06:30 PM Thread Starter
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thanks guys, sorry I haven't replied in so long. Anyway, what kind of torque converter and Tranny upgrades would you guys suggest?

BTW, I am now running 36" tires on a 4" lift.:thanks:
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