5.9L 24V Performance Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps Related To Performance And Longevity

Turbo question

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  #21  
Old 06-14-2011, 09:00 PM
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Default Turbo question

Originally Posted by 01quadcab
whats your rpm at when your doing this? Sounds to me like large exhaust housing on your turbo or turbos. it's not spooling I went from a 1.32 to a 1.10 on my 475 and that made daily driving nice and I lost nothing for power
Just cruising like 2100-2200 rpm... The top is a 62/14 I'm not sure what exh wheel is on the 475. Doesn't really feel like it's spoiling as fast as it should. Real smoky at low rpm till spool. Once they light tho hold on for the ride. Wastegate has a clamp holding the line shut right now and it runs 54 55 psi WOT. That's edge juice on hot unlock, 150hp big dawgs, and hotrod vp. Sounds to me like it could use more fuel, but to be honest I like how it runs with the EJ on lvl 3. It's MUCH smoother at WOT than on 6. Lvl 6 has rpm and boost fluctuations at WOT.
 
  #22  
Old 06-14-2011, 09:49 PM
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the top turbo has a laggy housing as did mine, I bet your 475 is the 1.32 ar too. I bet on level 6 when your boost fluctuates your gate is opening and will make it drive crazy. I ran mine with no gates made 85 psi down the track. more fuel or smaller housing will help
 
  #23  
Old 06-14-2011, 11:13 PM
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Default Turbo question

Originally Posted by 01quadcab
the top turbo has a laggy housing as did mine, I bet your 475 is the 1.32 ar too. I bet on level 6 when your boost fluctuates your gate is opening and will make it drive crazy. I ran mine with no gates made 85 psi down the track. more fuel or smaller housing will help
Yeah. You might not have caught in that last post that's 55 psi lvl 6 with the gate hose clamped off. I clear all my smoke at WOT also so I know I can use more fuel. I just don't understand why it would run cooler... There a guy on YouTube I found with my exact setup running 200ddp's and he can't break 1230 degrees. Weird
 
  #24  
Old 06-15-2011, 12:57 AM
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I didn't read the correct then yeah you need fuel because that should be making more boost. I believe they run cooler because you actually have the fuel to spool the turbos and make them efficient. you could also drop to less bottom turbo too but I think sticks are a lil cheaper and less work. I would also do a 3 piece manifold because the stock ones like to crack and it's possible you already have some cracks
 
  #25  
Old 06-15-2011, 09:42 AM
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Default Turbo question

Ddp 200's or big dawg 200-250 possibly. Or just do water meth and it'll drop the egts for sure...
 
  #26  
Old 06-15-2011, 10:55 AM
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I guess to me Im not a fan of the water meth due to the fact its not maintenance free. What I mean is its not like sticks drop them in one time and forget about them. Whereas the water/meth is like a propane bbq its nice when there full but your always going back to the store for a refill. Kinda get what I mean.
 
  #27  
Old 06-15-2011, 11:02 AM
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I agree sticks are less maintenance and water can always be added. I would get ddp 200's myself I ran them with my single for a month because I was doing compounds next and they were a little much for the 62.
 
  #28  
Old 06-15-2011, 12:01 PM
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Default Turbo question

Think 250s are too big?
 
  #29  
Old 06-15-2011, 09:20 PM
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I think the 200's are better for daily driving etc. less lag time etc. I would go with a quality injector like ddp or mach
 
  #30  
Old 06-19-2011, 07:09 PM
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Our Big Dawg 200's would work good with your setup.
 
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