noisy 38r
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jbwaldrop88
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sounds like the EBPV is stayin closed, my stocker sounds just like that on a cold morning
cw96stroker
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Maybe a possibility. Have you checked an made sure that the ebpv sensor is plugged in? And that it is working? If not I'm pretty sure it will try an stay closed, my brother just had this problem with his not long ago.
EBPV defaults to open not closed. So it being unplugged would not cause it to be shut. That is not to say its not simply stuck partially or full closed. That can happen.
How does it sound at the exhaust like a jet turbine. The whiny 38r are such a PITA as you here that whistle on some with any boost at all.
You really need to have someone check your codes and see what has been tripped. They are great for giving you direction to look. Find someone local that has a code reader that can read the 7.3 and see what you have.
If its the EBPV that would send the BP thru the roof which would peg the EBPS and that would effect your shifting as well as power. So if you happen to notice things like shifting acting weird it would seem to support this all.
You really need to check your codes as without that really all you can do without replacing stuff is to just make sure everything is plugged in and you see no obvious shorts or grounded wires.
How does it sound at the exhaust like a jet turbine. The whiny 38r are such a PITA as you here that whistle on some with any boost at all.
You really need to have someone check your codes and see what has been tripped. They are great for giving you direction to look. Find someone local that has a code reader that can read the 7.3 and see what you have.
If its the EBPV that would send the BP thru the roof which would peg the EBPS and that would effect your shifting as well as power. So if you happen to notice things like shifting acting weird it would seem to support this all.
You really need to check your codes as without that really all you can do without replacing stuff is to just make sure everything is plugged in and you see no obvious shorts or grounded wires.
cw96stroker
New member
Good to know, good info Tarm. He isn't going to notice any shifting problems since he has a zf6, but yes to be able to read the codes would give more direction in where to look for the problem.
nasty6.6
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found my problem! The rubber boot that connects the intake spider to the drivers side intake/head was leaking when hot. Only did it at operating temperature when you pressure tested the system when cold it held fine at 15 lbs. So I checked the ebpv and it has been gutted so I ruled that out. Went and drove it until it was up to temp and then pressured it up again and found the intake y/spider boot not holding and pressure. This turbo is still really noisy but atleast Im building boost and moving lol. Thanks for all the help guys.
cw96stroker
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Good deal, glad you got it figured out man!
nasty6.6
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:evil This should be stamped on this dang turbo haha its dang noisy! Time to get tunes and all the goods ready for the big lake pull! Lets see what this truck can do!
85_305
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This video is 1,000% a boost leak.
Looks like I'm too late, but if I had seen that video I would have bet the title to my truck it's a boost leak. Thats why I try to boost to double of what I expect my truck to make when doing IC leak down tests. And if that isn't pulling any boost leaks, I rock the motor back and forth, the IC, and all the fittings by hand, to simulate the engine torquing.
Project20v
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The 38R performance is great, but the noise is horrible. It's kinda cool in the beginning, but gets old quickly. I don't miss mine one bit.
Yep and the older you are the quicker it gets annoying. For me it was annoying the first time I was in one for 5 mins. LOL Main reason I never ran one. But since then I have been in a couple that were much quieter. Now running a gtx42 thats dead quite I think the issue is actually tolerances. If they are in a certain range they create a very bad whine from some sort of oscillation. I think this can be tuned out of them via balancing changes. Maybe give Dennis of Strictly diesel a shout as I recall him having a contact for that. Not sure the cost though sorry or down time
85_305
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I think the noise of the 38r has more to do with the structure of the housings and the wheel design, not so much tolerances.
I agree with you on this in a overall bases with turbos in general as a group. But to the 38R specifically there seems to be something specific to it outside the general traits of typical "acoustical performance" I guess if I had to coin a phase for it. If you consider that there are 38R that are as quite as the stock turbos yet many 38R are so far outside this as far as Whistle sound you would not think it was the same turbo line at all. When you then consider they are able to thru tuning or balancing able to change this. I guess it could still have something to do with wheel design and thus changing balance to modify the resonating frequency.
I would say in general most would say a very mild whistle especially under heavy load or high boost is almost positive and found pleasant. But a whistle of certain volume and frequency in low load lower rpms such as those found while cruising could almost be seen as a manf defect worthy of warranty work its so annoying. LOL These loud 38r I put in the latter category. I would never run one that sounded like some in trucks I have driven or ridden in. It makes exhaust drone pleasant in comparison.
It is this noise regardless of engine load that most find annoying. Its usually in the frequency range well over the 500mhz range you find typical engine and interior noise at we are use to and find acceptable.
I seem to have notes from something I must have read during researching it. Have to see if I can find the papers or where I got it. I will post up what I must have put done as notes on the subject.
There is basically 4 categories that turbo noises can be broken down into or what can generate them. That is what I think I was trying to put down.
Never mind I actually found the tech paper I was going to reference.
This may go way over some peoples heads from a simple lack of familiarity of the subject but some may find this quite interesting and possibly shed some light.
Turbo Charger Noise* - Development of a Methodology for the Acoustic Turbo Charger Layout
I would say in general most would say a very mild whistle especially under heavy load or high boost is almost positive and found pleasant. But a whistle of certain volume and frequency in low load lower rpms such as those found while cruising could almost be seen as a manf defect worthy of warranty work its so annoying. LOL These loud 38r I put in the latter category. I would never run one that sounded like some in trucks I have driven or ridden in. It makes exhaust drone pleasant in comparison.
It is this noise regardless of engine load that most find annoying. Its usually in the frequency range well over the 500mhz range you find typical engine and interior noise at we are use to and find acceptable.
I seem to have notes from something I must have read during researching it. Have to see if I can find the papers or where I got it. I will post up what I must have put done as notes on the subject.
There is basically 4 categories that turbo noises can be broken down into or what can generate them. That is what I think I was trying to put down.
Never mind I actually found the tech paper I was going to reference.
This may go way over some peoples heads from a simple lack of familiarity of the subject but some may find this quite interesting and possibly shed some light.
Turbo Charger Noise* - Development of a Methodology for the Acoustic Turbo Charger Layout
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