Anyone using H&S or similar get turbo surge on higher boost? - Ford Powerstroke Diesel Forum
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Old 02-23-2013, 09:45 AM
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Anyone using H&S or similar get turbo surge on higher boost?

I noticed a weird noise after doing a few moderate pulls and narrowed it down to turbo surge. I'm deleted with H&S mini maxx on the "performance tune."
Those that don't know what turbo surge is....
after you let off the pedal the extra pressure gets released to the blow off valve. Excessive pressure the blow off valve can't release will blow back into the turbo making the "turbo surge" noise. This is of course bad for the turbo since the pressure is trying to make the turbo spin the opposite way.

Here is a link to the same exact sound i am hearing on occasion..

Has anyone else heard this noise? I'm looking into a solution to correct this problem for good.... possibly delete the factory blow off valve and use a larger aftermarket blow off valve instead?
Thoughts??
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Old 02-25-2013, 11:26 AM
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youre gonna get surge no matter what when youre trying to pump huge boost out of these turbos. unless youre looking to buy a new turbo i think youre stuck as the wastegate is internal
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Old 02-25-2013, 11:27 AM
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that being said just never let off? once you time your foot to the load surge becomes pretty rare
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Old 02-26-2013, 05:31 AM
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I really have to try to get turbo surge. I rarely get it, when I do it's when I boost up real quick and let off quickly. And still it doesn't do it every time.
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Old 02-26-2013, 06:42 AM
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I run on the HOT tune all the time and as well as above post have to try to get a turbo surge, have never had it happen under "normal" driving. Only when the engine is under heavy load and throttle is quickly released.
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Old 02-26-2013, 07:45 AM
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since we are on the topic of surge, anyone upgrade the turbo and have a better wastegate solution?
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Old 02-26-2013, 04:05 PM
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You guys are correct, i noticed it mainly only does it when the throttle is quickly let off after a moderate pull.
I don't see how changing the turbo or wastegate will help turbo surge though. Boost being in the pipe has to get released regardless of what turbo is on there. The wastegate being internal or external just helps control the boost, it has nothing to do with preventing surge from happening. It only helps regulate boost creep.
I noticed thoroughbreddiesel sells a "blow off valve kit" to prevent surge. I haven't seen a kit for the 2011+ trucks though, but it's mainly uses the TPS sensor to operate the opening/closing of it.
Seems like a pretty good investment to prolong the turbo life. Even if turbo surge only happens every so often, happening never is always better.

Any others use this??
BD Turbo Guard Blow Off Valve
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Old 03-26-2013, 08:48 PM
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the only time my turbo surged was in 4wd in sand never had it happen even while pushing it on pavement
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Old 03-27-2013, 04:40 AM
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lately ive been getting a lot of turbo surge with the Spartan Warhammer
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