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Registered
Join Date: Oct 2001
Location: Westford, MA USA
Posts: 8,852
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My assumption is that he's running about the same port sizes as he is now. The S's lift of .455 is a little marginal in a 2.7 with it's 46 mm valves. The 3.0 engines have 49 mm valves which should help some, but still I suspect you'd be in a situation where ports (at least on a "large port" head with the 39 mm intake ports) could flow more if you lifted the valve higher. Unfortunately I don't have any flow-bench data, which would be the determining factor.
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John
'69 911E
"It's a poor craftsman who blames their tools" -- Unknown
"Any suspension -- no matter how poorly designed -- can be made to work reasonably well if you just stop it from moving." -- Colin Chapman
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