The Twin Screw Thread
01-08-2006, 07:57 PM
#587
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Woody,
Did you have your AF mixture on your dyno sheet?
Jim
Did you have your AF mixture on your dyno sheet?
Jim
Originally Posted by all4woody
I am installing headers and big exhaust on my '89 next month, is anyone interested in a used Ott X-pipe and RMB? Is $200 for both a fair price? Thanks, Woody
01-08-2006, 08:16 PM
#588
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Originally Posted by mspiegle
Whipples are slightly different. The "twinscrew" that we all have is made by Autorotor (a member of the Opcon group). The Autorotor twinscrew is slightly more efficient than the whipple twinscrew.
01-08-2006, 08:29 PM
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Nope, check out post #583
Originally Posted by FlyingDog
I read a few years ago that Whipples were originally made by Opcon, then were made under license in the US. This was back when you could buy perfectly good Eaton M112s on ebay for under $150 any day. I should have bought a few.
01-08-2006, 08:51 PM
#592
Sab,
It was one of the ones he did before taking some time off, I don't know what has changed. I have welded an extra bung in for tuning. They will be available next month after my new system is built.
Jim,
I think so, I will look. If not, I can still get the file from the dyno shop. I may stop by this week and have all my runs downloaded just for safe keeping.
Later, Woody
It was one of the ones he did before taking some time off, I don't know what has changed. I have welded an extra bung in for tuning. They will be available next month after my new system is built.
Jim,
I think so, I will look. If not, I can still get the file from the dyno shop. I may stop by this week and have all my runs downloaded just for safe keeping.
Later, Woody
01-09-2006, 12:50 PM
#596
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Did this topic break a record on number of views? It certainly has high interest! What's that tell us? Many of us want more bolt-on horsepower for our 928s!! But we're waiting for the success stories to roll in and to view the "sifting out" of the best appliance and to see what happens to our drive trains with this added HP.
Harvey
Harvey
01-09-2006, 01:49 PM
#597
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But we're waiting for the success stories to roll in and to view the "sifting out" of the best appliance and to see what happens to our drive trains with this added HP
The CS kits we sell continue to be simpler to install, and produce more HP, than their twin-screw counterparts. And there are NO reports of any 928 with one of our kits ever going into "limp-home" mode because the EGT sensors detected off-spec temps.
The 928s supercharged by Centrifugal Kits out-number the 928s supercharged by twin screw kits, I think. Andy was always tight with his numbers, and with the kits that were returned to him (some after they were installed) and resold kits that changed hands, its hard to know for sure.
But, I can point out that there are few CS posts on the forum, and no equivelant to "The Twin Screw Thread" for Centrifugal cars. That is because they ARE sorted out, and fully supported by their manufacturers, who are still in business.
Don't get me wrong... when I saw this thread at first, I thought it was a very smart idea. There are 928 owners left with "unfinished business" and loose ends to tie up since their manufacturer closed up shop. Plus, they can help support each other to finish and tweak the design. Its all good.
Hughett, this IS a long thread with many posts. Is it because there is so much interest in twin-screw? Or is it because there are so many questions and issues with twin-screw?
01-09-2006, 02:20 PM
#600
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I wouldn't mind adding one of these bad boys to the stable.