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75' Turbo long shot

Took up the challenge getting a 75' 930 back to its original state.
Finding the correct parts all over the world,my last find is the very diffecult 75' only wastegate.
This one will be send out tommorow for restoration,here is the long shot.
Might anybody have a nos or perfect rubber wastgate condome?





Should come out like this after they are ready, and when i can fine a the correct rubber.

Old 02-28-2017, 10:14 AM
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That is an AiResearch (Garrett, now Honeywell) wastegate common to construction equipment. Caterpillar for sure.
Any business specializing in heavy trucking and construction diesel turbos should be able to help you.
It would be best if you hand carry it in for them to see. Part numbers may reflect a special, highly marked up price, Porsche part number. They would have no records of this situation.
Old 02-28-2017, 11:15 AM
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I have seen some on e-bay for the later style, not sure if they are interchangeable.

Rahl
Old 02-28-2017, 11:20 AM
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Quote:
Originally Posted by copbait73 View Post
That is an AiResearch (Garrett, now Honeywell) wastegate common to construction equipment. Caterpillar for sure.
Any business specializing in heavy trucking and construction diesel turbos should be able to help you.
It would be best if you hand carry it in for them to see. Part numbers may reflect a special, highly marked up price, Porsche part number. They would have no records of this situation.
Thx,thats a intresting lead.
Will look in to this.
The later used wastegate uses a other other one,and still available.
I found the matching engine deep down in Germany,or at least what was left of it.
It was fully restored,but they chanced the top oil feed,looking also for this.

Last edited by Dwerkz; 03-01-2017 at 01:09 AM..
Old 02-28-2017, 09:59 PM
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Originally Posted by Dwerkz View Post
,but they chanced the top oil feed,looking also for this.
Do you mean the early turbocharger oil supply line, or the early camshaft housing oil lines?
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Old 03-01-2017, 10:02 AM
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Hi Chris
I think i need both.
The Turbo oiline looks different then 76/77.
And i need the correct original cam line also.

Old 03-01-2017, 11:16 AM
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Very nice find! Look forward to seeing it when restored.

There were two styles of Garrett wastegates used in 1975, this was the earlier design. At some point the top cover changed design (I'm still looking for good photos of that second variation).
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Old 03-20-2017, 06:27 PM
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Thx Ryan
Almost there,found the the correct CIS last week here on Pelican.
The wastegate is under restoration in Germany,the rubber valve was still ok,and whit out holes.
Looking more closely to all parts and stamps, i found out the cam housings are not correct date stamped.
They have the serial 930 105 021 00 wich on my info is a correct nr for this engine.
But a later production date,so i will have these chanced to the correct date ones.
I have seen early Turbo's also whit the serial 901 106 111 1R wich i think is a 3 bearing housing.
Can somebody confirm the early 75/76 where using the 3 bearing housings?
Here a pic of redwinelovers engine restoration also whit the 901 serial,wich i hope he will not mind using for reference

Old 04-19-2017, 02:42 AM
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My wastegate came back looking perfect again.
All new internals including valve and seating.







Old 07-09-2017, 11:32 AM
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my 75 and 76 cam housings are all 4 bearing 901 castings.
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Old 07-09-2017, 12:09 PM
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Who did your wastegate work, if I might ask. It is perfect, and I know of no source in the USA that can do comparable work.

FYI, the statement that the Porsche wastegate is identical to a Caterpillar or Airesearch model is not true. It is similar, but definitely not the same. See the pics below. This one is an early model for CNG.

Old 07-09-2017, 12:33 PM
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turbo oil line

Hi,Peter Dawe at Dawes Motorsport has the correct oil feed line.He is in Stroudsburg Pa.917-913-8853.He just finished a prototype RH drive 75 car.Fred
Old 07-09-2017, 12:37 PM
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my 75 and 76 cam housings are all 4 bearing 901 castings.
Yes thx,i found a 74' set a while ago wich are under restotation at the moment.
Old 07-09-2017, 01:06 PM
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Hi,Peter Dawe at Dawes Motorsport has the correct oil feed line.He is in Stroudsburg Pa.917-913-8853.He just finished a prototype RH drive 75 car.Fred
Thank you Fred
Tried to call them already a few times a while ago,will,try again.

Speedy pm for contact,price is high and location Germany.
Old 07-09-2017, 01:10 PM
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Who did your wastegate work, if I might ask. It is perfect, and I know of no source in the USA that can do comparable work.
You're kidding right? We refurbish wastegates and other components in our restoration shop. They will look just as good when completed. Have two 1976 930's in for restoration right now. Their serial numbers are a few digits apart, both in the first 10 imported to the US.
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Old 07-09-2017, 01:23 PM
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Originally Posted by RarlyL8 View Post
You're kidding right? We refurbish wastegates and other components in our restoration shop. They will look just as good when completed. Have two 1976 930's in for restoration right now. Their serial numbers are a few digits apart, both in the first 10 imported to the US.
Ok,that sounds intresting.
I have a friend who has the same 75' wastgate and looking to have his done.
You are welcome to do his,and he is not kidding
He needs the inside membrame also which will be no problem i think?
Old 07-10-2017, 11:59 AM
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The search is continuing,found the correct distributor pretty much complete here on the forum a while back.
It was in bad shape,but solvable.
The fuel distributor was restored, together whit the various other specific parts.





Old 01-30-2018, 09:33 AM
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Found a contact who DOW retreated some mag parts.

Old 01-30-2018, 09:38 AM
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Hi, I just jumped into the same kind of project. 1975 930 (number 150). Any ideas where I can find a plastic air cleaner? Thanks, Rod


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Old 01-30-2018, 10:53 AM
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Originally Posted by Speedy Squirrel View Post
Who did your wastegate work, if I might ask. It is perfect, and I know of no source in the USA that can do comparable work.
There's no one who can bead blast and install a new diaphragm for a wastegate??

What am I missing here?
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Old 01-30-2018, 10:54 AM
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