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Old Jan 17, 2023 | 06:56 PM
  #91  
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Originally Posted by ESwift
seems like a legitimate way to look at it mathematically.
So if you could gain another 800psi to get near 3,000 then you would gain 5,600psi fuel injection pressure out the nozzle. (In a perfect world of zero variances and losses)
Another 5,600psi is quite a substantial gain
Is that kind of pressure practical out of stock injectors? Was reading an old thread from Bill at PHP where he was talking about the stock AD being empty at 3.xx PW and anymore than that will drain ICP. With a tune running 4.43 PW I think any notable gain is something. Not 100% snake oil, different application, injectors may yield different results.
 
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Old Jan 17, 2023 | 07:02 PM
  #92  
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Originally Posted by brokestroke
Is that kind of pressure practical out of stock injectors? Was reading an old thread from Bill at PHP where he was talking about the stock AD being empty at 3.xx PW and anymore than that will drain ICP. With a tune running 4.43 PW I think any notable gain is something. Not 100% snake oil, different application, injectors may yield different results.
when your icp goes up the pw should shorten. More power and cooler egts ensue
 
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Old Jan 17, 2023 | 07:04 PM
  #93  
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Your nozzle pressure went down.
 
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Old Jan 17, 2023 | 07:09 PM
  #94  
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Originally Posted by Bitterroot Diesel
Your nozzle pressure went down.
Pretty vauge. Reason?
 
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Old Jan 17, 2023 | 07:10 PM
  #95  
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Remember the stick in the garden hose analogy?
 
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Old Jan 17, 2023 | 07:44 PM
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Originally Posted by brokestroke
Correct me if I am wrong, the intensifier piston on an A code is 7:1. So an ICP gain of 50psi = 350psi of nozzle pressure and an ICP gain of 90psi = 630psi.
I agree with your math theory but still think we don’t have data showing what the injectors are seeing. The ICP is being measured BEFORE the new restriction.

Think of it this way. You have an air compressor with a gauge at the tank. But you run equipment at the end of a hose. Smaller diameter hose equals less volume of air and less power at the tools (I’ve experienced this). The tank gauge reads the same with both hoses. You’d have to measure the psi at the tool to see the difference.
 
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Old Jan 17, 2023 | 09:24 PM
  #97  
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Originally Posted by RacinJasonWV
I agree with your math theory but still think we don’t have data showing what the injectors are seeing. The ICP is being measured BEFORE the new restriction.
'
Think of it this way. You have an air compressor with a gauge at the tank. But you run equipment at the end of a hose. Smaller diameter hose equals less volume of air and less power at the tools (I’ve experienced this). The tank gauge reads the same with both hoses. You’d have to measure the psi at the tool to see the difference.
If the ICP sensor shares the same oil rail as the injector, doesnt the injector see the same pressure as the ICP?
 
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Old Jan 17, 2023 | 09:36 PM
  #98  
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The increased PSI is a measurement of friction. Increased friction means less PSI to injectors.
 
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Old Jan 17, 2023 | 09:40 PM
  #99  
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Originally Posted by ESwift
when your icp goes up the pw should shorten. More power and cooler egts ensue

EGTs appear to be unchanged. They are already low, the WOT passes for data logging yielded 1150*egts.
 
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Old Jan 17, 2023 | 09:46 PM
  #100  
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Originally Posted by Bitterroot Diesel
The increased PSI is a measurement of friction. Increased friction means less PSI to injectors.
What if the oil rail of a 7.3 was smaller without adding a dowl of aluminum. Say it was machined/rewelded smaller or recasted smaller. Does decreasing volume mean "increased friction"?
 
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Old Jan 17, 2023 | 09:49 PM
  #101  
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Yes, the smaller the hose/pipe the more friction loss over a given length. Think 3/4 garden hose vs the standard 5/8 garden hose.
 
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Old Jan 17, 2023 | 10:08 PM
  #102  
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Originally Posted by Bitterroot Diesel
Yes, the smaller the hose/pipe the more friction loss over a given length. Think 3/4 garden hose vs the standard 5/8 garden hose.
Only way to know is a dyno. Theory on the concept appears to be split 50/50, I bought it, data logged it, thats all I've got. Not taking sides. It raised ICP and lowered IPR.
 
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Old Jan 17, 2023 | 10:16 PM
  #103  
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Yes, need to dyno before and after.
 
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Old Jan 18, 2023 | 06:39 AM
  #104  
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Originally Posted by brokestroke
EGTs appear to be unchanged. They are already low, the WOT passes for data logging yielded 1150*egts.
But are you getting full empty of you injectors at 2100 icp? Mayne you could get more power, more fuel in and keep the low egts. Maybe your egts are low now because of not having as much fuel being burned
 
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Old Jan 18, 2023 | 07:41 AM
  #105  
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Originally Posted by ESwift
But are you getting full empty of you injectors at 2100 icp? Mayne you could get more power, more fuel in and keep the low egts. Maybe your egts are low now because of not having as much fuel being burned
Hard to say, has always had low EGTs and good power.
 
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