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J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

Rats, my turbos poked! More than just oil seals wrong with it. is damaged almost beyond repair. The turbo specialist say to rebuild with new parts- and everything is damaged- will cost $4700.00.
a new unit will cost $3000.00 or i can trade in for $1800.00. 931's are a rare beast here, i know of none on nz in a wreckers yard so thats not an option. how much do they go for overseas??

also, garrett turbos are far more common here. how hard would it be to put in a garrett t25 or t28 turbo in instead of a kkk unit??
TIA
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'86 944

Lizard · Posted: Thu Jul 24, 2003 7:08 am Post subject:

to put in the Garrett, you would have to build a custom exhaust manifold though and you might have a problem attaching the CIS/lambda system
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3 928s,

J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

what problems could i have with the fuel injection??
-1980 931
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'86 944

Lizard · Posted: Thu Jul 24, 2003 8:26 am Post subject:

attaching the CIS/Lambda suction to the intake of the turbo
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3 928s,

J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

is that the only thing? does modern turbos not allow for this or is modern efi different?? im sorry i know the basics of how a turbo works but i dont know 'a' plugs into 'b' etc.

also is it possible to modify the exhaust manifold to take the new turbo rather than custom building a whole new one?
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'86 944

Lizard · Posted: Thu Jul 24, 2003 8:58 am Post subject:

second Question no, you would HAVE to build an entire new manifold.
question 1, the turbo bolts to the exhaust manifold and on the other end there is an in pipe which would go to an air filter on a car with EFI, and connects to the bottom of the CIS/lambda system on ours, the other pipe on the intake housing end of turbo connects to the charge tube
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3 928s,

project931 · Joined: 10 Dec 2002 Posts: 95 Location: scranton, pa

i totally disagree with lizard on this one. the manifold can be modified to take the garrett turbocharger. just cut off the current flange and weld on a garrett flange. I also believe the CIS can handle the Garret. the amount of fuel the engine recieves is regulated by the metering plate. even if the garret sucks more air then the kkk unit, it will still move the metering plate accordingly.
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J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

sounds great project931, can someone please verify?
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'86 944

81turbo · Joined: 03 Nov 2002 Posts: 1065 Location: Oakland, CA

Sure welding the flage will work just fine as long as it is done well.

BUT, That is not the main concern. How the hell are you going to attatch a different turbo to the block? You are getting into some serious fabrication here. As you well know there isn't much room to play with. Also many Garrets are water cooled. Yet another complication. It would really be worth your time and money to just source a new KKK unit.

Also the CIS would not be affected by using a different turbo.

Lizard · Posted: Thu Jul 24, 2003 9:40 am Post subject:

project931 · Joined: 10 Dec 2002 Posts: 95 Location: scranton, pa

i think the manifold can support. mine wasn't attached when i first bought it and who knows how long the previous owner drove around like that. the turbo on my GTI is only attached at the manifold. granted its a smaller turbo.

you'll probably also have to modify the exhaust a little bit but that shouldnt be a problem.

i think the garrett would be a great upgrade especialyy if its watercooled.
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project931 · Joined: 10 Dec 2002 Posts: 95 Location: scranton, pa

J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

this option is looking more and more attractive. ive left a message for my mech friend to look at this idea. i will forward all this info to him when he calls back.
as far as i know, a rebuilt kkk turbo will have to be sourced from the States. theres just none really here in nz.
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'86 944

J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

project931 · Joined: 10 Dec 2002 Posts: 95 Location: scranton, pa

our turbo's are actually oil/air cooled. that's why we have that ugly NACA duct in the hood. the benefits of water cooled is the additional cooling method. if you add a watercooled turbo to our cars it'll be oil/air/watercooled.

keeping the turbo temps down helps with bearing life and oil life. i.e. less burnt oil gunking up the bearings. Also, colder intake temperatures and we all know what that means.

I was looking at a garrett turbocharger this evening out of a Merkur XR4TI and it didn't have any provisions for a bracket to mount to the block. Its about the same weight as a K26. So, I think you should be alright without the bracket.
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