[MikeD930]

I see...well it depends on your hp goals. You would be more likely to blow up a heavily modified NA aircooled 911 if you're trying to go over 300 rwhp (not sure if that's ever done reliably). A properly tuned and modified 930 will easily put out 400 rwhp while being relatively reliable comparing to a 300 rwhp NA 911 aircooled engine.