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-   -   Hesitation after turbo swap (https://www.evolutionm.net/forums/evo-engine-turbo-drivetrain/752375-hesitation-after-turbo-swap.html)

bishop9d4 Dec 24, 2018 01:14 PM

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?

2006EvoIXer Dec 24, 2018 02:42 PM

Pictures? Video?

kaj Dec 24, 2018 05:12 PM

My best guesses:
Massive boost leak. If not: dead turbo.

bishop9d4 Dec 24, 2018 07:07 PM

Turbo is new

2006EvoIXer Dec 24, 2018 07:52 PM

Pictures of turbo. Especially the blades on each end.

:worthless

2006EvoIXer Dec 24, 2018 07:59 PM


Originally Posted by bishop9d4 (Post 11853815)
Turbo is new

it is possible to have a bad new turbo when the wrong wheel is used.

kaj Dec 24, 2018 08:28 PM


Originally Posted by bishop9d4 (Post 11853815)
Turbo is new

You did a boost leak test?

2006EvoIXer Dec 24, 2018 09:02 PM

Does your compressor wheel look like this?:
https://cimg2.ibsrv.net/gimg/www.evo...c9f1df3eb1.jpg

bishop9d4 Dec 24, 2018 11:19 PM


Originally Posted by kaj (Post 11853829)
You did a boost leak test?

Doing that tommorow

bishop9d4 Dec 24, 2018 11:22 PM


Originally Posted by 2006EvoIXer (Post 11853825)
Pictures of turbo. Especially the blades on each end.

:worthless

Gotta take it back off the car

ctfpevoVIII Dec 25, 2018 05:42 AM


Originally Posted by bishop9d4 (Post 11853779)
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?

bishop9d4 Dec 25, 2018 06:51 AM


Originally Posted by ctfpevoVIII (Post 11853843)


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?

kaj Dec 25, 2018 09:47 AM

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!

kaj Dec 25, 2018 09:50 AM


Originally Posted by bishop9d4 (Post 11853847)
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.

2006EvoIXer Dec 25, 2018 10:04 AM


Originally Posted by bishop9d4 (Post 11853837)
Gotta take it back off the car

pop off the intake pipe from MAF and take a picture of blades.


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