12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

i have way less boost than you. help?

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Old 02-11-2011, 12:03 PM
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Default i have way less boost than you. help?

so as I'm reading around, guys are talking about having way more boost than I can even imagine. I only get good boost in 4th gear of the auto trans and even then, 20 pounds is all I can muster with my foot on the floor. seems dumb that 1 gear out of 4 can produce power and then it's less power than you all seem to make. what can i do?
 
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Old 02-11-2011, 12:08 PM
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Old 02-11-2011, 12:12 PM
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The lines going to the boost guage sound like they may have air coming through them but no way enough to throw my boost off that much. It doesn't sound like it's spooling up enough to put out more even if there was a leak.
 
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Old 02-11-2011, 12:29 PM
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I had a gathering here once and we tested I think 7 trucks........all had leaks, band clamp tightning fixed most of em though
 
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Old 02-11-2011, 02:08 PM
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sounds like fun. might have to get something like that here in ohio
 
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Old 02-11-2011, 02:23 PM
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u will only build as much boost as ur fuel delivery allows. i was only able to build about 22psi till i installed my 4k gsk. now it will will do 37psi with mods in sig.
 
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Old 02-11-2011, 03:25 PM
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Also if the truck is bone stock I would only expect to see 16-20 out of it. To get more, you need to put a boost jet on the feed line to the wastegate to bleed off air pressure to the wastegate actuator and help hold the wastegate closed longer, making more boost.

However, if you are not having EGT issues, then I wouldn't worry about it. Too many people get hung up on wanting a ton of boost. You only need as much boost as is needed to keep egts under control. Excessive boost means extra drive pressure, which is less efficient.
 
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Old 02-13-2011, 03:32 PM
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I'm sure someone won't like this advice, but if it is a stock turbo just plug the line to the waste gate and wire the gate valve shut. shouldn't have to worry about overboosting with a stock turbo.
 
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Old 02-13-2011, 09:29 PM
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Originally Posted by hannacorona
I'm sure someone won't like this advice, but if it is a stock turbo just plug the line to the waste gate and wire the gate valve shut. shouldn't have to worry about overboosting with a stock turbo.
not saying that is rite or wrong you shound have to worrie about overboosting your engine you do have to wacth that you dont over speed your turbo my understanding is that more than 35# with HX35 is out of it map and just blowing hot air
 
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Old 02-14-2011, 10:39 AM
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without any leaks my 95 only got 16 boost stock,same thing a a friend of mine 94
 


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