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Old 02-26-2014, 04:50 AM
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Blow off valve, do I need one?

Was reading that it can damage your turbo or other components if you have an egr and crossover pipe delete without a blow off valve or waste gate, is this true? If so what are some good brands that make them?

Thanks Kelsey


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Old 02-26-2014, 05:37 AM
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Originally Posted by kelsapher View Post
Was reading that it can damage your turbo or other components if you have an egr and crossover pipe delete without a blow off valve or waste gate, is this true? If so what are some good brands that make them?

Thanks Kelsey


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Let your right foot be both of them. The BOV helps when you let off the gas suddenly with a lot of boost built up. If you have it floored, just let off the gas slightly slow so you don't hear compressor surge (turbo bark) and you won't need one. For the 6.4, your options are limited and people have ran into issues with them working properly and lasting. BD and Jegs make them.
They can be a PIA to get dialed in.

WG: Usually on stock fuel and stock turbos they aren't necessary. It really depends on how far you want to push the truck. Monitor your EBPs when at WOT. Everyone will disagree a little about what is "safe", but if your EBPs are below 65, I think everyone would agree that is safe. If you start getting EBPs in the lower 70s, I would let off the gas although most people won't have that problem on stock fuel and turbos and many still don't consider that number dangerous. Remember, a WG is referenced to boost so you can't pick a single EBP number and expect it to open every time at that EBP. Also, like a BOV, they can be tricky to get dialed in.

In summary, monitor your gauges at WOT and be smart and you won't need one and you won't have to deal with the headaches they can cause.
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Old 02-26-2014, 03:27 PM
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Thanks B I was also wondering
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Old 02-26-2014, 04:47 PM
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My egr is in place but bypassed with my mini maxx when towing I hear a surge when I let of the throttle is this normal? I am by no means towing heavy or beating on the truck. I do not hear it much if at all during normal everyday driving?
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Old 02-26-2014, 05:45 PM
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Depends on what ya are hearing. You here the turbos releas
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Old 02-26-2014, 06:13 PM
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Is hearing the turbos release normal? I only started noticing it after I installed my s&b intake
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Old 02-26-2014, 07:11 PM
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Is hearing the turbos release normal? I only started noticing it after I installed my s&b intake
Sorry, on the last post...my phone got cut off and that is what ended up posting....anyways, yes hearing the release is normal...it all depends on how much boost there is and how fast you let off. Too much too quick is an issue. Back when I had stock turbos, I could get a real high pitch "yelp" on certain tunes, but those were in the days of early tuning which seemed to be most of the issue.
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Old 02-26-2014, 07:20 PM
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Thanks for the information. I will be careful when letting off of the throttle.
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Old 02-26-2014, 08:23 PM
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Thanks for the information. I will be careful when letting off of the throttle.
YouTube a few videos on this. I briefly did a search on YouTube and most of the ones I saw were relatively mild/moderate (or the video didn't do it justice). Perhaps I can best explain this way....if you hear a constant release of pressure (which gets progressively weaker until it can't be heard) then this is normal. If you hear the pulsating release of air (when you watch a video you will know what I mean), then that can be tough on the turbos.
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Old 02-27-2014, 04:57 AM
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I will have to do some researching on YouTube tonight but if it is a fast release of air then what needs to be done? Is it possible I'm only hearing it now because of the intake or possibly cold weather?
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