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Old 06-07-2010, 08:51 PM
  #121  
Robert Linton
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No, it is very much a Porsche and could not have been done without the help of many engineers and others at Porsche AG. And, with the engineering done, the 20 year old Porsche weighs 1000 lbs (453 kg) less than the GT2RS even with the weight of the Tiptronic transmission and of the specially made Porsche AG roll bar (covered in leather).
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Old 06-12-2010, 11:00 PM
  #122  
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One of the ways in which the Tiptronic may be weight optimized is through the use of ceramic bearings.
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Old 06-15-2010, 12:20 AM
  #123  
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Almost finished machined magnesium transmission adapter ring.
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Old 06-15-2010, 10:54 AM
  #124  
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Originally Posted by Robert Linton View Post
Almost finished machined magnesium transmission adapter ring.
Nice piece Robert. hogged out of Billet??

I could have cast that for you but it would have looked like a casting. A high quality casting but a casting none the less.

Looking forward to seeing the final product.
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Old 06-15-2010, 10:06 PM
  #125  
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Machined from billet. What color should we use for the coating - thinking of aircraft lime green.
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Old 06-16-2010, 10:30 AM
  #126  
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Almost finished machined magnesium transmission adapter ring. ??

Geez, Bob - what's left to do? Oh, coating...
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Old 06-16-2010, 10:32 AM
  #127  
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The work displayed in this thread is simply stunning. I could look at this all day.
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Old 06-16-2010, 11:20 AM
  #128  
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Originally Posted by Robert Linton View Post
Machined from billet. What color should we use for the coating - thinking of aircraft lime green.
My suggestion would be not to add a color that is not present in the car... you now have the color of the car, some blue in the hose fittings, green in the springs, purple in the fuel tank...

You know what!? In second thought, go for it! Lime green would look great!
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Old 06-16-2010, 08:55 PM
  #129  
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Thank you. And I so happy about the engine -- 445 Real (i.e., on a certified engine dyno) HP and 438 Nm of torque from a normally aspirated air cooled two valve engine. Now for the design and manufacture of the final lightweight parts so as to substantially decrease mass, particularly rotating and reciprocating mass.
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Old 06-16-2010, 09:03 PM
  #130  
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Originally Posted by Robert Linton View Post
Thank you. And I so happy about the engine -- 445 Real (i.e., on a certified engine dyno) HP and 438 Nm of torque from a normally aspirated air cooled two valve engine. Now for the design and manufacture of the final lightweight parts so as to substantially decrease mass, particularly rotating and reciprocating mass.


Oh man!
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Old 06-21-2010, 12:50 AM
  #131  
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I've heard that modern Mg alloys are much more corrosion resistant than the ones on the older 911s (e.g. engine cases & 911 transmissions).

- Is this true? And, if so, what did they do to improve the alloys?
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Old 06-21-2010, 03:26 AM
  #132  
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Bob what are doing for the Clutch/flywheel? How will the Tip handle the RPM up/down?
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Old 06-21-2010, 10:45 AM
  #133  
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Originally Posted by randywebb View Post
I've heard that modern Mg alloys are much more corrosion resistant than the ones on the older 911s (e.g. engine cases & 911 transmissions).

- Is this true? And, if so, what did they do to improve the alloys?

There have been advancements in controlling alloy purity and corrosion reduction however it is still magnesium and susceptible to corrosion if not properly protected. This has been known for close to 40 years and has been applied to military aircraft since the 70's and became more popular in the 80's. Studies going back as far as the 40's were being performed but limited application never amounted to much development of lower corrosion higher purity alloys. This also depends on which alloys are being used for what purpose. Some alloys are basically the same as they were back in the 30's others are just a variation of a common alloy controlling the primary corrosion causing elements such as Iron, Manganese and Copper. by reducing the quantity of the element and controlling the ratios it helps control corrosion although acceptable levels are still 50 mpy for a simulated one year corrosion test.

Some new alloys have been developed but practical applications are limited and cost is high.

Dow metals standardized chemical conversions or surface treatments for magnesium alloys way back in the 40's. These will reduce corrosion considerably but if the surface treatment is damaged and exposed to the elements it will corrode.
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Old 07-27-2010, 11:47 AM
  #134  
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The GS America is mentioned on page 166 of Classic and Sportscar magazine July issue. The article profiles an owners 964 Speedster, which was commissioned and built after Speedster production had ceased; it was custom built though the Exclusiv program. (It's a RHD Speedster, btw).

I'm quoting the article

'Production of right-hook Speedsters ceased in June 1993 so, when the order for one more car came in, Porsche Exclusive was commissioned to hand-craft it in Werk 1, the very building in which Porsche was launched. Alongside would be the 964 America 3.8 GS Hardtop Roadster, ordered by a New Yorker and scheduled to be the last 964 made.'
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Old 08-05-2010, 05:24 AM
  #135  
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Robert - isn't this the engine fan?

Last edited by ACSGP; 08-05-2010 at 05:56 AM.
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