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Those dang tiny S3 valves…

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Old 01-08-2023, 05:14 PM
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hwyengr
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Default Those dang tiny S3 valves…

I’m finally getting to the most recent issue of 000, and there’s a couple of tiny 928 shoutouts.

First, one of the design studio clay model builders took a backhanded compliment towards Tony Lapine and the “obvious GM design influence” of the 928.

But more surprisingly, the central feature of the issue is a couple of still-running 959 prototypes. Csaba Csere wrote about his trip to Germany for the first test of the 959 for C&D in ‘86. He describes some of the technical background, and mentions that the combustion geometry of the 959 is exact same as the original 32V M28.43/44.

I had never heard that tidbit before, and wonder if trying to use the valve layout for both platforms explains why such small valves were used on the 100mm bore V8, because they had to fit on the 95mm 959 engine as well.




Last edited by hwyengr; 01-08-2023 at 05:15 PM.
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Old 01-08-2023, 10:54 PM
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The Forgotten On
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Also explains why the S3 heads can match up to and bolt onto a 4.5 block...
Old 01-09-2023, 10:05 AM
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icsamerica
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Originally Posted by hwyengr
I’m finally getting to the most recent issue of 000, and there’s a couple of tiny 928 shoutouts.

“obvious GM design influence” of the 928.
What exactly is the "GM design influence" ? I've owned C3 and C4 Corvettes and a slew of other GM GT cars cars from the 70's up 'till today and I dont see anything notably GM esthetically or mechanically?

Front engine 90 degree V8? ... Lots of cars had that in the 70's
Styling... the 928 to my eye is a mashup of brutalist and Bauhaus design and that is solid German.

Perhaps the technology developed for the 959 found its way to the 928?

Last edited by icsamerica; 01-09-2023 at 10:13 AM.
Old 01-09-2023, 04:32 PM
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IcemanG17
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It could be that many other companies went to the transaxle after the 928 did it, C5-C7 corvettes come to mind
Old 01-09-2023, 05:25 PM
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Originally Posted by icsamerica
Front engine 90 degree V8? ... Lots of cars had that in the 70's
Project 928 started around 1971. Tony Lapine was on the Corvette team prior to Porsche and said the 928's shape was influenced by the Chevrolet Tustudo which was designed by Italian designer Giorgetto Guigiaro.

Originally Posted by icsamerica
Perhaps the technology developed for the 959 found its way to the 928?
Splitting hairs at this point. If Pete Stout was confident enough to publish that the cylinder chamber design came from the 928 project, that's good enough for me.

Originally Posted by IcemanG17
It could be that many other companies went to the transaxle after the 928 did it, C5-C7 corvettes come to mind
Pontiac Tempest had a transaxle from 1961-1963
Old 01-09-2023, 05:26 PM
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Originally Posted by icsamerica
Perhaps the technology developed for the 959 found its way to the 928?
Only the finest 959 tech found its way over. Like the A/C low-pressure switch




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Old 01-09-2023, 05:50 PM
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The TPMS, PSD, and a few other things were tech that found its way over. But the 959 received a lot of 928 tech
Old 01-09-2023, 07:05 PM
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Originally Posted by The Forgotten On
But the 959 received a lot of 928 tech
Like air filter box.
Old 01-09-2023, 08:05 PM
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Originally Posted by Vilhuer
Like air filter box.
......and the Veyron uses the 928 air filter

https://rennlist.com/forums/928-foru...nize-this.html
Old 01-09-2023, 08:26 PM
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Speaking of the Tempest, I open up Facebook and this is at the top of my newsfeed:

Daytona, 1963. One of the most iconic and important auto racing photos ever taken. Mickey Thompson was driving Chevrolet's "Mystery Engine": a special 427 cid V8 that wouldn't see production for 3 more years. Notice all the lead cars are 1963 Corvettes...except that square bodied grocery getter that looks like it's in 5th place during this testing run.

That car is a 1963 Pontiac Tempest with a dual quad 421 Super Duty in it. And that Tempest isn't in 5th place. It's in position TO LAP THE TOP FOUR CARS. That's correct. Those Corvettes, Mickey Thompson, Chevy and it's Mystery Engine are about to go one lap down to GM's experimental performance division, Pontiac. Chevrolet never really did recover from this slap in the face from it's sister division.
​​​​​​​




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