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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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 Posted: Fri Jul 28, 2006 4:07 am Post subject: Turbo Sounds Thru Stethoscope |
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Alright, I found another fine technique for making myself paranoid!
I was playing around with my steth on my new 931 (which is coming along pretty well), and pressed it against the turbo housing. It seems like it ought to be pretty quiet at idle, but I could hear a distinct "scuff scuff scuff scuff" sound, a couple times per second. Is this the impellor scraping the housing, or am I being a paranoid nut?
Anyone else ever steth'd their turbo? Anyone wanna try it and tell me how it sounds?
rasta
P.S. The turbo seems to spin up smoothly. . .makes that nice compressor sound with fairly light throttle at around 2200 RPM. . .and pulls HARD. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Fri Jul 28, 2006 1:28 pm Post subject: |
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Maybe you are hearing the bypass valve?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue Aug 15, 2006 2:07 pm Post subject: |
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Well, I got the answer at last. I had the downpipe off to replace a couple of studs, and jiggled the turbo shaft. Y'know how the guy in the Haynes manual is using a micrometer to measure axial play?
I COULDA USED MY THUMB!
But, instead of crying about it, I started tearing into it. . .exhaust is on the ground, wastegate is in hand (I like how it says PORSCHE).
So, I guess I should dismantle the wastegate while it is off, eh? Do you guys think I should go for the "hybrid" from Majestic, or some other rebuilder? Is the hybrid pressure pipe mod easy or hard?
TIA
rasta
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Tue Aug 15, 2006 2:22 pm Post subject: |
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What is the hybrid pressure pipe mod?
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[This Space For Rent] |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue Aug 15, 2006 2:25 pm Post subject: |
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| flosho wrote: | | What is the hybrid pressure pipe mod? |
Sorry, someone around here had Majestic build them a turbo with a KKK hotside and a Garrett compressor...bolt-up, except for the intake. So, there would need to be some adapter to get everything dialed into the factory intake plumbing.
rasta
P.S. Oh yeah, and what about Blaylock Turbo. Pretty persuasive website.
_________________
Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
Last edited by Rasta Monsta on Tue Aug 15, 2006 3:52 pm; edited 1 time in total |
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Tue Aug 15, 2006 2:31 pm Post subject: |
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I'd go with a hybrid turbo, k26 hotside and garrett compressor... it'd be worth it imo.
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OutOfTheBox
Joined: 31 Mar 2006
Posts: 434
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| Posted: Thu Aug 17, 2006 9:25 am Post subject: |
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| what is the price of the hybrid ? |
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