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Thierry25 Thierry25 is offline
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Join Date: Feb 2009
Location: FRANCE (Besanšon)
Posts: 310
Dear 911ST , no sorry but I am 100% sure. These cams come from X33 option ( which is called 965 3.3 turbo "s" here and is stated at 355HP ). Not kidding you. I can provide picture to you as well as engine serial number (M30/69S). The owner of the workshop I bring my car now, also own an original 965 turbo 3.3 S (355HP) . He is also 100% sure since he made the engine (M30/69S) rebuild by himself. Actually these cams seems to be referenced as 930.105.147.50 &930.105.148.50 but the real reference which is engraved on their each extremities are : 930-147-10 et 930-148-10 ....this is the same reference as SC cam. They just added the 2 flangers in order to drive additionnal devices(oil & steering pump I think).
As to the spring I bought a complete set of new one (stock) for my engine rebuild. It seems there is no special reason to change it if we don't "play"with high power over 7000 RPM . According to your estimated suggestion, I will check the question of the spring reset.

By the way, I saw through several thread that you did something like an "andial " system on your car. May I know more about this ? Actually I was quite enthousiast by the digital wur. However this device is not available and not completely ready at present time. If you want to share your idea and valuable experience in fuelling improvment, I would be very glad. :-)

Dear JF, yes you are right, the 964 cam timing is 1.25mm. It is possible that Porsche installed the 964 cams on the very rare 964 3.3 turbo S "leichbau" which is stated about 388 HP ( motor is M30/69SL / They produced only very few of this model )

Thierry
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965 C2T / 1991 3.3 TURBO
Old 02-19-2009, 04:36 AM
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