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Bill Verburg Bill Verburg is offline
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Join Date: Dec 2000
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the RoW SC 930/10 was the strongest street 3.0L ever offered, 204hp@5900, 267NM@4300, 9.8cr, small port

the RoW C3 930/02 was the next strongest, 200hp@6000, 255NM@4200, 8.5cr, large port

all power & torque per DIN 70020

smaller ports speed up the gas flow in the intake, it gives stronger vacuum signals and better throttle response, if you can do that while producing the same or more hp & torque you have a better engine.

The same controversy continues today but is not so clear cut, there is a school of thought that preferes the small port 964 heads w/ larger 993 valves over the large port 993 heads,
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Bill Verburg
'76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone)
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