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bouncing boost gauge

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Old Jan 8, 2007 | 09:37 PM
  #16  
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From: Central, Al
Not a bit.
 
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Old Jan 8, 2007 | 09:41 PM
  #17  
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wow, what should i do? what have you done to your turbo?
 
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Old Jan 8, 2007 | 09:43 PM
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Neither does mine. I never entertained any thought of useing one of those boost relief valves.
I want all the air that my turbo pumps to go to the engine!!
I use the overboost regulator from ITP diesel with zero regrets and full recommendation.
 
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Old Jan 8, 2007 | 09:45 PM
  #19  
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Nothing yet, are your hearing any surge?
 
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Old Jan 8, 2007 | 09:55 PM
  #20  
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no i dont think so. i have herd some really bad surge in my friends old psd pulling a 12k trailer. so you guys are telling me that when you are floored the gauge dosent shake one bit? just want to make sure because my truck has done this from day one.
 
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Old Jan 8, 2007 | 09:58 PM
  #21  
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I always wondered what the key ring is for on the various relief valves
 
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Old Jan 8, 2007 | 10:05 PM
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I have had 30# on the gauge and seeing 22# at the MAP with AE.

This was with Shop Air when testing it. The gauge dropped about 1/2# when the valve relieved and then climbed steady to 30#.

Could you have a small leak at the boost connection that only occurs once the boost climbs?
 
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Old Jan 8, 2007 | 10:09 PM
  #23  
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i dont know where. i have all new dieselsite boots and i checked the tightness of them today, they all were good.
what does minor surge sound/feel like?
 
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Old Jan 8, 2007 | 10:14 PM
  #24  
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Originally Posted by sean23johnson
no i dont think so. i have herd some really bad surge in my friends old psd pulling a 12k trailer. so you guys are telling me that when you are floored the gauge dosent shake one bit? just want to make sure because my truck has done this from day one.
I did this with a WW in the factory intake housing and the wastegate connected pulling a hill at 65 mph in the truck and trailer you see in my signature. 24,000lb gross weight. The needle did not bounce one bit.
Diablo Predator Tow/Haul tune loaded. After I returned home from that trip my overdrive gear bearing was gone and you could hear a distinct rumbling noise coming from the rear of the transmission. But that is another subject.
With your DP tune and the factory intake wheel, you'll never get rid of the turbo surge without installing one of those AIS boost relief housings. A wicked wheel is not good enough for you this time, it will still stall, just at a slightly higher pressure.

 
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Old Jan 8, 2007 | 10:14 PM
  #25  
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Originally Posted by amiller93
I have had 30# on the gauge and seeing 22# at the MAP with AE.

This was with Shop Air when testing it. The gauge dropped about 1/2# when the valve relieved and then climbed steady to 30#.

Could you have a small leak at the boost connection that only occurs once the boost climbs?
Alan, try running 23-24psi through it. At 30# the force is heavy enough to keep the valve constantly open.
 
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Old Jan 8, 2007 | 10:18 PM
  #26  
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Originally Posted by sean23johnson
i dont know where. i have all new dieselsite boots and i checked the tightness of them today, they all were good.
what does minor surge sound/feel like?
It sounds a lot like a towel flapping in the wind. Or a very rapid chuffing sound. And a combination of those two sounds wrapped into one.
You remember those pictures of fighter planes in a very high G turn with the visible water vapor on the tops of thier wings?
The same thing is happening at your turbo inlet. The compressor vanes are stalling and there is chaiotic pressure waves bouncing around inside the turbo making all kinds of racket.
 
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Old Jan 8, 2007 | 10:18 PM
  #27  
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Originally Posted by Kwikkordead
I did this with a WW in the factory intake housing and the wastegate connected pulling a hill at 65 mph in the truck and trailer you see in my signature. 24,000lb gross weight. The needle did not bounce one bit.
Diablo Predator Tow/Haul tune loaded. After I returned home from that trip my overdrive gear bearing was gone and you could hear a distinct rumbling noise coming from the rear of the transmission. But that is another subject.
With your DP tune and the factory intake wheel, you'll never get rid of the turbo surge without installing one of those AIS boost relief housings. A wicked wheel is not good enough for you this time, it will still stall, just at a slightly higher pressure.

kwik, my truck currently does not have the dptuner hooked up, it is all stock. what is the AIS boost relief housing?
 
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Old Jan 8, 2007 | 10:19 PM
  #28  
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Kris, I cranked it up slowly all the way from 0. When the valve released at around 23# the gauge dropped about half a pound and then recovered and climbed with the supplied pressure all the way to 30.

Sean not a boot leak but a leak at the BRV+ itself.
 
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Old Jan 8, 2007 | 10:21 PM
  #29  
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It's a housing with some bleed rings around the inlet to combat that stalling.
My truck would stall badly with a stock tune and pulling a trailer up a hill but never empty. The WW cured all that for me, but it is only effective with very mild tunes, which is all I ever run. And it works perfectly for that.
 
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Old Jan 8, 2007 | 10:21 PM
  #30  
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Originally Posted by Kwikkordead
It sounds a lot like a towel flapping in the wind. Or a very rapid chuffing sound. And a combination of those two sounds wrapped into one.
You remember those pictures of fighter planes in a very high G turn with the visible water vapor on the tops of thier wings?
The same thing is happening at your turbo inlet. The compressor vanes are stalling and there is chaiotic pressure waves bouncing around inside the turbo making all kinds of racket.
oh-yah, that is what my truck sounds like at about 2800-3200rpm.
 
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