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Old 11-01-2008, 11:37 AM   #1
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turbo changed sound at wot

so last night went to the track then on the way home had some fun. But today i got on my car sounded normal at partials. At WOT the turbo does not sound the same. It sounds like it is sucking in harder.

I pulled the intake off and there is no shaft play. The wheel spins very well and i didnt hear any bearing noise. I also started it and reved it while i was over the turbo still nothing.

Anyone have any idea why this would happen?

thanks mike


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Old 11-01-2008, 11:43 AM   #2
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All of my turbos tend to make more "sucking sound" after about 10psi I think its just a characteristic of the turbos.
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Old 11-01-2008, 11:47 AM   #3
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but it wasnt this loud last week haha
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Old 11-01-2008, 12:34 PM   #4
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just took the car out again. turned the boost down to 6 pounds still does it in first and second but third sounds normal. i think its in the waste gate. sounds like its not opening all the way.
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Old 11-01-2008, 01:05 PM   #5
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Maybe check for exhaust leaks shortly after the turbo? When my EGR pipe split in two before I removed the cat, the turbo spool became much more pronounced at half-throttle.
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Old 11-01-2008, 01:24 PM   #6
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good call didnt even think about that. i prob snapped another trany mount at the track. that explains the wheel hop lately. with the motor moving i bet the exhaust pulled apart
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Old 11-01-2008, 01:29 PM   #7
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It's that damn stiff suspension you got in there, looks awesome but must be a bitch to ride in lol
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Old 11-01-2008, 01:34 PM   #8
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yeah tends to feel any and every crack in the road haha. its getting taken out in a few weeks. back to the eibachs for a few months
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Old 11-01-2008, 05:50 PM   #9
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so found out that i broke my VF rear dog bone. Didn't think it was possible. Ill post pictures later. But my exhaust was good....But my waste gate is not shutting all the way. That is prob where the sound is coming from. im going to take it apart and clean it see what happens
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Old 11-01-2008, 07:04 PM   #10
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I've had all 3 VF mounts for 2 years without any issues--but if you got one of the first few hundred then they have some sort of problematic design that they addressed. Either way I'd take it out and ask them if it's covered.

If you clean it be careful, I think it has some sort of finish on it that can be taken off by conventional cleaners. I would stick to soap and water or something or check the tial website for recommendations (I figure thats probably what you have).
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