Quote:
Originally Posted by DaytonaCoupe66
The redline on my 1982 stock 930 with an original well functioning 42 year old engine is 6800 rpm. Even before 6K the kick is tapering off. P engineers likely had a good reason for putting that red mark where they did.
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Original 930 cams are really soft, minimal overlap/low lift/duration; no point holding RPM past the power band. Even SC cams - which are a lot "hotter" - are completely done by 5500 RPM and power is falling off by 6K; it's very obvious on the dyno chart. Without other changes, SC cams don't make much more power (10%) at the top - but, although they can't do anything about the appalling turbo lag with the stock boat anchor, they do really improve mid-range response - especially with a better turbo/intercooler and headers.
The 3.2/3.3 share the same rod bolts. Neither the SC nor the 964 used those undersized rod bolts. And neither let go. Whereas the 3.2/3.3 ones do - so ARP or Raceware bolts (which are NOT stretch to fit and discard after, but are instead infinitely reusable as long as elastic limit is not exceeded) are a must if you're going to ignore the rev limit. They may even save you $$$$ if you miss a down shift - although it's better not to rely on that...