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Go Back   Fun In B.C. > All about your Ride > Dodge Talk

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  #1  
Old 06-21-2009, 11:47 AM
ShuswapRedneck ShuswapRedneck is offline
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wastegate chatter?

Since I installed my home made intake and turned the fuel screw up a little on my 1992 12 valve intercooled Cummins, when towing up a hill, at low RPM with my foot to the floor, I get a chattering noise coming from the turbo area. When I downshift and the RPM's climb the noise stops until the RPM's drop again. Is it turbo stall, wastegate chatter, or something worse? I try not to let it make that noise very often, or for long periods, but I don't know if it's harmful, or if it's something that requires attention/upgrade. Thanks!
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  #2  
Old 06-21-2009, 12:35 PM
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epic3 epic3 is offline
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check the turbo for shaft play
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  #3  
Old 06-22-2009, 08:14 PM
78bronco 78bronco is offline
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the first gen 12 valves dont have wast gates!!! But that being said an thus assuming you have a stock turbo ie h1c
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  #4  
Old 06-23-2009, 11:43 AM
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mine does the exact same thing. ive been told its the compresser wheel "cavitating" and the only way to fix it is either a new turbo or one of those compressor wheel upgrades or detune the engine.
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  #5  
Old 06-23-2009, 12:24 PM
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Apathy Apathy is offline
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ya, i'm going with turbo stall, but i might be wrong.
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  #6  
Old 06-23-2009, 12:40 PM
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mine does the exact same thing. ive been told its the compresser wheel "cavitating" and the only way to fix it is either a new turbo or one of those compressor wheel upgrades or detune the engine.
mine was doing that...i had to put in a blow off valve to fix it. The last thing you want is that turbo trying to spin backwards on you
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  #7  
Old 06-23-2009, 06:00 PM
Lynx Lynx is offline
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hmm compression surge or turbo bark doesn't usually happen at low rpms though. Usually happens when your given'r shit and let off quick. All the boost has no where to go and ends up going back out through the turbo making a chatter sound. A blow off valve would fix that.
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  #8  
Old 06-23-2009, 08:17 PM
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its not turbo bark. it is when there is full throttle before the turbo is making full boost. ill find a vid of it
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  #9  
Old 06-23-2009, 11:21 PM
78bronco 78bronco is offline
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or theres too much back pressure get a 4" full exahust from stans headers in auburn washington
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  #10  
Old 06-24-2009, 09:48 PM
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my chev does that when im really on it in sand or mud, its the turbo backspooling, not good for it,
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  #11  
Old 06-24-2009, 10:21 PM
fumanchu fumanchu is offline
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I've turned the screw on mine and there's no noise.What's different about the intake?
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  #12  
Old 06-25-2009, 06:24 PM
ShuswapRedneck ShuswapRedneck is offline
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I made my own intake with a 4" inlet K&N cone filter, a piece of flexible rubber tubing with the wire rings in it (to keep it from collapsing) and a piece of 4" exhaust to couple it. My exhaust isn't the problem, it's 3" straight from the back of the turbo (3" outlet) into 5" stacks. I thought the Holset turbo had an internal wastegate on these things? The sound is made when at WOT but at low RPM, like going up a hill around 80KM/H in 5th gear at about 2000 RPM. It's like a really fast tshhhtshhhhhtshhhhhtshhhhhtshhhhh . A BOV? Cool...I can be ricey!
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Old 06-25-2009, 09:13 PM
78bronco 78bronco is offline
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if you have a stock turbo you dont have a wast gate check out my power wagon thread its called turned up the wick theres pics of my stock turbo and my HX40
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  #14  
Old 06-25-2009, 09:50 PM
ShuswapRedneck ShuswapRedneck is offline
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Nice job on your Cummins, and I can see the turbo with no wastegate. Dang. OK, so on a limited budget, what do I do to make it stop the compressor stall...which is what I assume it is?
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  #15  
Old 06-26-2009, 07:48 PM
78bronco 78bronco is offline
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thanks.I dont think its compressor stall it could just be the sound of turbo spooling
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