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Registered
Join Date: Oct 2001
Location: Westford, MA USA
Posts: 8,861
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My thoughts are in line with Bobboloo and Walt's. I wouldn't pay too much attention to the example of the turbo motor within the context of what you're trying to do since the mixture going throught a Turbo's ports and valves is pressurized, that's a whole 'nother ball of wax.
My research on porting a few years ago suggested that the 36 mm ports on the stock 2.7 RS are a bit restrictive for generating max HP, and is one of the reasons why a 2.7 RS feels more like a "big E" rather then a "big S" engine.
What sort of rev range do you want with your engine? Once that's defined, the HP targets should fall into place from there.
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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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