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

boosting issues

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Old 03-29-2012, 08:18 PM
gregt1989's Avatar
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Default boosting issues

hey i just did my injector upgrades a couple days ago and before i did them i was seeing 22lbs of boost on the stock turbo but now with ddp stage 3's im only seeing 25psi. i thought it would be around 35-40 with that big of injectors. everything runs great just not as much boost and smoke as i thought they would be. is this normal?
 
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Old 03-29-2012, 08:33 PM
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I'm running 100 horse sticks on stock turbo at the moment n I'm seeing 40 psi. does it smoke a lot? I'd check for a boost leak.
 
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Old 03-30-2012, 10:07 AM
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Nope doesnt smoke excessively. Only when I hammer on it. Even when it does smoke its less that I thought it would be
 
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Old 03-30-2012, 11:24 AM
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Hmmm okay whats your pump settings?
 
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Old 03-30-2012, 11:34 AM
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Star wheel all the way in and I have the longer fuel screw and it went all the way in without running away which I thought was weird
 
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Old 03-30-2012, 11:37 AM
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Im thinking its those gs gauges id say check the boost line and swap in another gauge to compare cause it sounds like the truck is running pretty good and hes getting fuel based on the egt and the vid hes got on bd fb page looks like it builds and holds boost

Sent from my DROIDX
 
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