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Building a 3.0L Turbo motor.

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Old 01-07-2015, 03:09 PM
  #31  
blown 944
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Originally Posted by Pfc. Parts
Are you doing the assembly? If you've got a thread started for your build I'd love to read it!


It is based off my initial design in my signature. Shawn (refresh951) was the first to replicate it and did a great job writing it up as well as a DIY thread. There are a few more completed on here duke has a 16v 3.1, Dave w has a 2.85.

It's not your std 3.0 build. But it's the only way I'd go. In regards to a how to", it's pretty basic engine building other than the specialized pieces ie; crank girdle, oil pump etc.
Old 01-07-2015, 03:12 PM
  #32  
333pg333
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Originally Posted by Tom M'Guinn
It wasn't actually the 2.7 head. Porsche made a special 8v head for their 3 liter turbo motors -- similar to the 2.7 but actually didn't flow as well, reportedly to keep power within certain limits. Cue Raj....
There you go. Thanks Tom. I didn't know that.
Old 01-07-2015, 04:07 PM
  #33  
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Originally Posted by Pfc. Parts
Are you doing the assembly? If you've got a thread started for your build I'd love to read it!
I am but I dont have a thread. I'm not good at writing and keeping up to date. it would read like "doing build, got parts, broke stuff, bought new stuff...."
Old 01-07-2015, 04:08 PM
  #34  
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Originally Posted by blown 944
It is based off my initial design in my signature. Shawn (refresh951) was the first to replicate it and did a great job writing it up as well as a DIY thread. There are a few more completed on here duke has a 16v 3.1, Dave w has a 2.85.

It's not your std 3.0 build. But it's the only way I'd go. In regards to a how to", it's pretty basic engine building other than the specialized pieces ie; crank girdle, oil pump etc.
yup!

only interesting thing we did was to "pin" the block. Cheap mans version of decking while still keeping the cooling. I should post a picture.
Old 01-07-2015, 06:59 PM
  #35  
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Originally Posted by Voith
Doubt it. But your customs dont need to know that they cost $1550. To untrained eye in unlabeled box protected by newspaper, they look like $100~200 new old stock pistons for some old tractor/snowmobile/excavator something.
This is true but if they go missing what would insurance pay ?. I'm leaning towards nickel ceramic plated cylinders and pistons that don't need coating.
Old 01-07-2015, 07:09 PM
  #36  
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Originally Posted by 333pg333
As fejjj says, no such thing as a 2.7ltr turbo. I think you maybe getting a bit of mixed info. The 968RS turbo had a 3ltr 8v motor but it used the head off the 8v 2.7ltr motor which had bigger valves than the 2.5ltr head. I believe the Firehawk series you're thinking about had 16v n/a motors in them and was only raced in North America. There was also no model of 944 S Turbo Cup car. It was just the Turbo Cup which was the 1st series of Cup racers by the factory. Then moved onto 911 variants although there was a bit of a time when you had both the 964 and 944 Cups on the same racetrack. There are videos around that you can find. Often very entertaining. Lot of body roll in those cars back then but they were well driven.
This is a big misconception. A turbo S or RS head on a 968 is a one off part and not a 2.7 head. It has round, much smaller intake ports and ceramic liners on the exhaust side.
Old 01-07-2015, 07:11 PM
  #37  
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Originally Posted by 968TurboS
This is a big misconception. A turbo S or RS head on a 968 is a one off part and not a 2.7 head. It has round, much smaller intake ports and ceramic liners on the exhaust side.
Disregard. It was corrected already.
Old 01-07-2015, 09:26 PM
  #38  
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my pinned block
Old 01-07-2015, 10:30 PM
  #39  
Tom M'Guinn

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Originally Posted by 968TurboS
Disregard. It was corrected already.
But you arrived right on cue...
Old 01-08-2015, 06:41 AM
  #40  
Adonay
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Originally Posted by dizzyj


my pinned block
Interesting.
Old 01-08-2015, 07:56 AM
  #41  
Pfc. Parts
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Originally Posted by 333pg333
There was never a 3L 16v turbo from the factory. There was a 2.5L 16v that was raced at Le Mans. Not a Cup car.
I went back and re-read the description of the eBay car in light of what you said the ad did say the 3.0L was built by the owner (or maybe just doesn't say the engine was built by Porsche) and the car was later converted back to factory spec. It's using sources like this that get me in trouble. Unless I know in advance there was never a factory 16V 3L turbo made, even in a factory sponsored racing program, I might get the impression it was a factory supported mod. The ad doesn't say it was a custom build, only that it was eventually restored to original spec. I confounded "cup car" with "factory", so thanks for the clarification.

Anyone know the best source for finding this kind of stuff? Are their books on Porsche's racing programs that talk about specs, when they were raced and the results? It's easy to find the results, not so easy for me to find a source that talks about what changes were made as teams developed the cars over time. I've heard, for example, that the German team dropped out of the cup program around 1990 and before the French team did, and that the French eventually developed a car that made 390hp, but not a lot of detail on how they did it; a "larger turbocharger" was implied, not a lot of detail.
Old 01-08-2015, 03:29 PM
  #42  
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Can you post a link to this Ebay car you're referencing?
Old 01-08-2015, 03:31 PM
  #43  
333pg333
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Originally Posted by 968TurboS
This is a big misconception. A turbo S or RS head on a 968 is a one off part and not a 2.7 head. It has round, much smaller intake ports and ceramic liners on the exhaust side.
Thanks Raj (and Tom). I hadn't paid enough attention to these cars. Always thought it was essentially the 3L block with the 2.7L head and this gave enough tq/hp for the purpose. Interesting that they reduced the port size? Absolutely must have been governed by a power to weight ratio class restriction and didn't want to embarrass the rear engine king of the day either I guess.
Old 01-08-2015, 03:35 PM
  #44  
Pfc. Parts
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Originally Posted by 333pg333
Can you post a link to this Ebay car you're referencing?
Yes, should have done that to start with. It's at:

http://www.ebay.com/itm/Porsche-944-...-/301040717931

Regards,
Old 01-08-2015, 03:50 PM
  #45  
Pfc. Parts
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Originally Posted by 333pg333
Can you post a link to this Ebay car you're referencing?
Hey Patrick, in trade, would you consider telling us where that pop-up headlight delete kit you show in your avatar photo came from? Inquiring minds want to know...


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