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Hesitation after turbo swap

Old Dec 24, 2018, 01:14 PM
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Hesitation after turbo swap

I just did a turbo swap. Did a fp mani with a hta71 turbo. Everything is installed and the car idles fine. There's no jitters or anything like that. The problem comes when i get on the gas and it takes 4 every to get moving. I hear the turbo spooling like hell but she is not really moving and the bov flutters like there wasn't much air. Even after a pull at 4k there's not much bov sound and the car doesn't really take off. Anybody have a clue as to what the issue could be?
Old Dec 24, 2018, 02:42 PM
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Pictures? Video?
Old Dec 24, 2018, 05:12 PM
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My best guesses:
Massive boost leak. If not: dead turbo.
Old Dec 24, 2018, 07:07 PM
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Turbo is new
Old Dec 24, 2018, 07:52 PM
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Pictures of turbo. Especially the blades on each end.

Old Dec 24, 2018, 07:59 PM
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Originally Posted by bishop9d4
Turbo is new
it is possible to have a bad new turbo when the wrong wheel is used.
Old Dec 24, 2018, 08:28 PM
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Originally Posted by bishop9d4
Turbo is new
You did a boost leak test?
Old Dec 24, 2018, 09:02 PM
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Does your compressor wheel look like this?:
Old Dec 24, 2018, 11:19 PM
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Originally Posted by kaj
You did a boost leak test?
Doing that tommorow
Old Dec 24, 2018, 11:22 PM
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Originally Posted by 2006EvoIXer
Pictures of turbo. Especially the blades on each end.

Gotta take it back off the car
Old Dec 25, 2018, 05:42 AM
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Originally Posted by bishop9d4
I just did a turbo swap. Did a fp mani with a hta71 turbo. Everything is installed and the car idles fine. There's no jitters or anything like that. The problem comes when i get on the gas and it takes 4 every to get moving. I hear the turbo spooling like hell but she is not really moving and the bov flutters like there wasn't much air. Even after a pull at 4k there's not much bov sound and the car doesn't really take off. Anybody have a clue as to what the issue could be?
what was your previous turbo/ setup? Could it be tune related?
Old Dec 25, 2018, 06:51 AM
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Originally Posted by ctfpevoVIII


what was your previous turbo/ setup? Could it be tune related?
Not tuned yet. We just finished yesterday took it around the block and noticed a hi pitched squeal like something was open but we checked everything 14 times. Fp turbos usually that loud?
Old Dec 25, 2018, 09:47 AM
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99% of the time it's a boost leak. That's the easiest and cheapest thing to do. I'd say Start there before stressing about all the bigger stuff.
and good luck ,dude!
Old Dec 25, 2018, 09:50 AM
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Originally Posted by bishop9d4
Not tuned yet. We just finished yesterday took it around the block and noticed a hi pitched squeal like something was open but we checked everything 14 times. Fp turbos usually that loud?
If it has the FAP cover ,yes. Also,.If you have a bad enough boost leak, the turbo could be spinning 1,000,000RPM and sucking a ton of air, which could be pretty noisy.
Old Dec 25, 2018, 10:04 AM
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Originally Posted by bishop9d4
Gotta take it back off the car
pop off the intake pipe from MAF and take a picture of blades.

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