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Turbo is down-Options?

So I heard a noise upon turning off the motor on my 78 930 I didn't like. It was coming from the turbo. It sounded like the compressor wheel making slight contact. Upon inspection, it was quickly discovered a dial indicator nor feeler gauge was needed.

There was excessive radial play but the end play was not bad...all relative of course.

There was some contact made with the compressor wheel with the housing.



Options that I can see are the following:
  • Send to Durabilt for a rebuild
  • Order another K27 HFS
  • Move to a ball bearing turbo
  • use a leaf blower (I had to throw that in there)
I am not comfortable with a DIY rebuild here, not on this part. After tinkering with it for an hour. I think I will leave this to someone who does this all through the week and the year, etc.

Thoughts, other options I have not considered? Has anyone used Majestic in Waco, TX? They focus on Diesel stuff mostly, but turbos are turbos.

Yes, Brian I will be reaching out to you as well as Chris. I have worked with both and both are great imho.

Thanks all,

John
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John- I blame and thank the longhood boys of Austin
-84 911 Carrera w/ 930 t/p,efi'd,dizzy free,HFS turbo, 78 930 RoW no option sunroof coupe, 64 Corvette roadster, 71 911T, 73 911E, 67 Bronco survivor. 71 FJ40, 95 M3 (for sale)
"Illegitimi non carborundum"

Last edited by sundevil64; 03-08-2014 at 09:56 PM..
Old 03-08-2014, 09:43 PM
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John, based on their excellent reputation, I think that sending it to Durabilt is a no-brainier.
Old 03-08-2014, 10:44 PM
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GT35R, I wouldn't think twice about it! Philip
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87 930 GHL/Rarlyl8/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LM-2/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin COP/8.25:1/KEP stage 2/twin tials/close 2,3,4th. MS3Pro Evo 500+ HP, BTSOMP Dyno
Old 03-09-2014, 05:31 AM
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Quote:
Originally Posted by philip j View Post
GT35R, I wouldn't think twice about it! Philip
This is definitely what I plan to do if/when my K27 takes a dump
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Old 03-09-2014, 10:08 AM
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What about the GT30? I understand it is more responsive, but lacks the upper end. I typically don't take my motor past 5800rpm.
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John- I blame and thank the longhood boys of Austin
-84 911 Carrera w/ 930 t/p,efi'd,dizzy free,HFS turbo, 78 930 RoW no option sunroof coupe, 64 Corvette roadster, 71 911T, 73 911E, 67 Bronco survivor. 71 FJ40, 95 M3 (for sale)
"Illegitimi non carborundum"
Old 03-09-2014, 10:20 AM
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Quote:
Originally Posted by philip j View Post
GT35R, I wouldn't think twice about it! Philip
Philip,

Looks like your motor is built for that kind of volume. Do you have any pics you can post?
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John- I blame and thank the longhood boys of Austin
-84 911 Carrera w/ 930 t/p,efi'd,dizzy free,HFS turbo, 78 930 RoW no option sunroof coupe, 64 Corvette roadster, 71 911T, 73 911E, 67 Bronco survivor. 71 FJ40, 95 M3 (for sale)
"Illegitimi non carborundum"
Old 03-09-2014, 10:21 AM
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Quote:
Originally Posted by sundevil64 View Post
What about the GT30? I understand it is more responsive, but lacks the upper end. I typically don't take my motor past 5800rpm.
Since i never wanted to build a dyno queen that lays down massive HP, I still run factory boost level. I also have considered whether a GT30 would provide some benefit in terms of boost threshold and response. In discussions with Chris at TK, he really pushes the GT35. No noticeable downside, with additional upside potential. My engine is 3.5 liter and has ported heads, so it will breath a lot more air than a std 3.3, but I know that Chris uses the GT35 on relatively stock examples with great results.
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Old 03-09-2014, 10:34 AM
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Heres a good shot of the GT35R

I purchased this from Chris @ TK, and would do it again if required. I'd go with this unit as it leaves room for the madness!
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87 930 GHL/Rarlyl8/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LM-2/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin COP/8.25:1/KEP stage 2/twin tials/close 2,3,4th. MS3Pro Evo 500+ HP, BTSOMP Dyno
Old 03-09-2014, 10:53 AM
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I'd just rebuild it w TK.
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Old 03-09-2014, 11:09 AM
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Philip,

Thanks for posting pics. I have ghl's also, but just had to tig them again to fix some more cracks in the collector. Have you had much problem with them? I have set of 993HE's that I have flipped the flanges so I am thinking about using that set up. No issue there with those collectors and they have great heat. There is a little drama with heat ducting, but not much. I saw you have twin wg's. Nice. What muffler are you running? Magnaflow from TK?

John
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John- I blame and thank the longhood boys of Austin
-84 911 Carrera w/ 930 t/p,efi'd,dizzy free,HFS turbo, 78 930 RoW no option sunroof coupe, 64 Corvette roadster, 71 911T, 73 911E, 67 Bronco survivor. 71 FJ40, 95 M3 (for sale)
"Illegitimi non carborundum"
Old 03-09-2014, 11:33 AM
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Brians muffler

No problem with the GHL's, but there almost new.
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87 930 GHL/Rarlyl8/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LM-2/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin COP/8.25:1/KEP stage 2/twin tials/close 2,3,4th. MS3Pro Evo 500+ HP, BTSOMP Dyno
Old 03-09-2014, 12:42 PM
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So it's on order, the new turbo that is. Hopefully I get time to install it before the Hill Country Rallye 2014 (Hill Country Rallye).

I am also changing my exhaust set up from ghl's and a Borla exhaust to 993 HE's with the flanges flipped, twin wg's (tial 38mm 1 bar), and M&K y pipe and dual exit muffler. I ordered a GT35R for my 930 that has sc cams but is still CIS.

This set up came off of my other turbo car while motor is getting rebuilt.


I also made a heat shield that was cheap ($15) from a turbo volvo. It's aluminum so it shouldn't damage anything should it rub. It should be effective. I made a hole later for the O2 sensor for the meter. Easy to work with, but use good leather gloves unless you like band-aids.

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John- I blame and thank the longhood boys of Austin
-84 911 Carrera w/ 930 t/p,efi'd,dizzy free,HFS turbo, 78 930 RoW no option sunroof coupe, 64 Corvette roadster, 71 911T, 73 911E, 67 Bronco survivor. 71 FJ40, 95 M3 (for sale)
"Illegitimi non carborundum"
Old 03-17-2014, 05:53 PM
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