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Old May 3rd, 2013, 09:17 AM   #21
High Center Hancho
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It's a video of the sound you limp dick faggot fucker. I don't know where the sound is coming from to post a pic of..

How do you know I have a limp dick? I told your mom to keep that a secret! anywho post a pic of your "blow off valve"
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Old May 3rd, 2013, 10:53 AM   #22
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the sound is turbo blowback... ie you are under boost, the engine shifts or you back out of the peddle and the boost in the intake surges backwords through the turbo. Fairly normal with open intakes. The stock intake helps hide this sound. Compressor wheel wear/endshaft play can make the noise louder, but all fixed vain turbos has surge or blow-back noise.

And again, you don't have a blow off valve

You can unplug and/or remove the stock back pressure valve if you would like. But you won't have heat in the winter for 20+ minutes...
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Last edited by Bones; May 3rd, 2013 at 10:59 AM.
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Old May 3rd, 2013, 10:55 AM   #23
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You in fact have a wastegate that is what you are hearing.
do you mean an external wastegate?
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Old May 3rd, 2013, 12:53 PM   #24
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the sound is turbo blowback... ie you are under boost, the engine shifts or you back out of the peddle and the boost in the intake surges backwords through the turbo. Fairly normal with open intakes. The stock intake helps hide this sound. Compressor wheel wear/endshaft play can make the noise louder, but all fixed vain turbos has surge or blow-back noise.

And again, you don't have a blow off valve

You can unplug and/or remove the stock back pressure valve if you would like. But you won't have heat in the winter for 20+ minutes...
What you hear in the video is just at shifting. When I'm on the highway pulling a loaded trailer, the sound shutters, it's leaking air from the same spot that that sound is coming from just not that much.
It never did that last year. So that tells me something is warm and needs to be replaced. What would your guess be?
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Old May 3rd, 2013, 01:00 PM   #25
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Originally Posted by 92FleXj View Post
What you hear in the video is just at shifting. When I'm on the highway pulling a loaded trailer, the sound shutters, it's leaking air from the same spot that that sound is coming from just not that much.
It never did that last year. So that tells me something is warm and needs to be replaced. What would your guess be?
my first guess is compressor wheel on the turbo

My second guess is the back pressure valve is stuck or not opening fully, but they would have a sig reduction in power with it.

pull your intake off the turbo and push/pull and wiggle the wheel to feel for endplay. Check for damage on the wheel from dirty air.

EDIT- if you really think it is an air leak, check the intercooler boots for tears, etc. Also check the intake manifold boots.
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Old May 3rd, 2013, 01:10 PM   #26
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Do the rubber boots for your turbo have holes in them? Not uncommon.
this and or turbo damage
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Old May 3rd, 2013, 01:19 PM   #27
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I looked over all my boots again today. They all look new like when I put them on. Felt for tears or holes and could not find any
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Old May 3rd, 2013, 01:36 PM   #28
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Theres a back pressure valve under the turbo for warm up and then theres a wastegate on top has a vaccume line that runs over to the map sensor.
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Old May 3rd, 2013, 01:40 PM   #29
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I looked over all my boots again today. They all look new like when I put them on. Felt for tears or holes and could not find any
The last pair of boots I bought didn't have tears or holes either. We must buy our shoes at the same store
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Old May 3rd, 2013, 01:48 PM   #30
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Are we sure it isn't the blow off valve? Just checking.
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Old May 27th, 2013, 11:54 PM   #31
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This is the waste gate opening like its designed to do... Option 1, If you want to hear less of this noise you can disconnect the red line that goes to the waste gate and just stick it on an intercooler bolt, this will delay the wg from opening. Option 2, you can pull the wg off of your truck tighten the rod up 7 turns and install a banks big head wg. Option 3, tighten the rod all the way up and forget about it. Option 4, (what I did) ditch the turbo all together and get a turbo off of a 7.3 van engine. It's a bolt on with a non waste gated 1.15 A/R exhaust housing, but you will need to buy an adapter for the exhaust side to use your exhaust. You'll get a bad a** zing sound out of the exhaust when you let off the "gas".
If you decide to do option 2-3 there is a c-clip on the back of the wg if your not careful you'll loose it... I promise you that. What I like to do is take a piece of dental floss, tie it to the c-clip and tie the other end up somewhere else under the hood. This way when you do pop the clip and it goes flying to who knows where you can simply pull the damn thing back to you via dental floss.
Good luck finding your blow off valve
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Old May 28th, 2013, 06:25 PM   #32
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look up the whicked wheel. helps with compressor surge.
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