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Factory 928 Cup racers?

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Old 12-25-2007, 11:24 PM
  #16  
atb
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Good deal Constantine.

I found the doc on my kids computer, which I remembered was one of my old office computers. Lots of 928 related stuff on there that I gathered 5+ years ago that I need to resort and resave onto my current computer. If I come across any more stuff on the Cup Cars, or similar 928 stuff from the factory, I'll send it your way. I can't believe I lost track of this stuff, glad to have found it again.

Originally Posted by Constantine
Hi Adam,

I got the letters today from John V. Pretty cool stuff contained in a few letters. Looks like Mr. Crumb really did us 928ers a favor getting Porsche AG to tell a bit about their modifications for the 928 for this series.

This is the kind of stuff that should be more available.

Happy Holidays,
Constantine
Old 12-25-2007, 11:39 PM
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Dennis K
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I don't have the letter Adam mentions but I do have a couple from Kim Crumb already uploaded onto a website so people can download for themselves. Check this old post:
https://rennlist.com/forums/showpost...1&postcount=19

Look for the 1994 letter, which is about the Cup cars.
Old 12-26-2007, 01:33 AM
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atb
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Let see if this does the trick.

Cup Car Spec here.
Old 12-26-2007, 01:35 AM
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atb
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yup, that's the ticket. Once the program pulls up the document, zoom out so you can read it all at once. It's a couple pages long.
Old 12-26-2007, 02:41 AM
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mark kibort
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16" rear wheels?? no body work??

what kind of tire fits on a 16" rim. 485s???

mk


Originally Posted by atb
yup, that's the ticket. Once the program pulls up the document, zoom out so you can read it all at once. It's a couple pages long.
Old 12-26-2007, 07:23 AM
  #21  
marton
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Interesting stuff; anybody know what he meant by "the intake system ....resembles the Indy system"

I assume there was not ever a 928 at Indy & he is referring to another model? I think that they used a 6 cylinder boxer motor at Indy in 1980?

Marton
Old 12-26-2007, 07:34 AM
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Black Sea RD
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Hi Marton,

I remember reading about Porsche AG building up a car that would have competed in the Indy series in the 1980s. After a lot of development work and testing Porsche did not go through with the program. I believe the article was in Excellence magazine and I know I have a copy of it somewhere and IIRC it showed nice closeups of the engine with a good description of it. Hmmm, gotta go find it and reveiw it again.

Cheers,
Constantine
Old 12-26-2007, 07:52 AM
  #23  
Black Sea RD
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Cool stuff!! Has anyone tried the oiling control used by Porcshe AG? Wonder what their oil pan baffling system looked like. What was so special about the pistons? No mention of a special crank and the con rods are stock so no stroking going on. Heim jointed suspension is standard fare for Porsche with their track cars. Would be great to see pictures of the suspension components.

I wonder if Mr. Crumb ever got that video.

Seems the track history of the 928 model is not so bland after all...

Constantine
Old 12-26-2007, 08:29 AM
  #24  
John Veninger
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The letter indicated that they were making a video going through the points of the car with commentary.
As far as I know the video is still MIA. Kim had given me some contact info on the video and I had a few people in Europe try and track it down many years ago.

The grass roots 928 crowd has already developed the 928 way past what the factory did way back when.
Old 12-26-2007, 08:45 AM
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martin D
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Originally Posted by Constantine

Would be great to see pictures of the suspension components.

I wonder if Mr. Crumb ever got that video.
Some pics of Porsche Motorsport a/r bar (next to stock) & springs /shocks & g/box oil cooler.
The a/r bar has a Porsche P/N 928,343,073,70 , the springs are Eibach & are dated '91'92'95 & the shocks are Bilstiens. The g/box oil cooler is an electric boat water pump, it could be an owner installation.


IIRC Kim repeatedly tried to get the video but always drew a blank.











Old 12-26-2007, 09:30 AM
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Peter F
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Great pictures thanks for sharing!
Where was the cooler placed and was the pump connected to the front of the gearbox?

/Peter
Old 12-26-2007, 10:10 AM
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Hi Martin D.,

Great pictures, thank you! Any heim jointed areas on the car? Who built up this 928 by the way?

Cheers,
Constantine
Old 12-26-2007, 01:55 PM
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I might have seen one of the factory adjustable swaybars. The Holbert came with such a bar, and Bill Ball has it now. (it had 3 or 4 adjustment holes to stiffen the bar up and the diameter of the bar was much thicker too)

I certainly think the developement of our cars now is in excess of the cup cars of the proposed series. If i read those specs and was going to compete in a race, there would be nothing that would frighten me, except the 16" rear rims. (i wonder if that was a misprint).

mk
Old 12-26-2007, 02:50 PM
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marton
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Hi Constantine

I found this link about the 1980 Indy racer

http://962.com/historic_porsches/por...1022/index.htm


Hi Martin D

Thanks for the fotos.
Do you still have those parts & interested to sell them?
Not for me but maybe other people would be interested

Marton
Old 12-26-2007, 03:20 PM
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Fabio421
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A picture of the intake



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