Re: viggen pistons - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: viggen pistons
Posted by Dean (more from Dean) on Sun, 24 Oct 2004 11:02:41
In Reply to: viggen pistons, MTAERO [Profile/Gallery]
, Sun, 24 Oct 2004 09:47:27
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Same engine in 9-5's and more of these than Viggens, so more posts there, and some on perf BB too.
Octane in premium fuel there is?
One thought is that the mixture is leaned out when getting partly off throttle from boost. A transient condition.
Another is that high blowby from the crankcase delivers too much oil mist into the intake that lowers octane. Certainly after one piston cracks, the blowby gases would be greatly increased. And note all the problems folks have with PCV systems and Saab hoping that they have it right with PCV mkIII
posted by 68.93.19...
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