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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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DC40 OR DC 60? That's the real choice, IMO. Once you decide on the cams then the carb choice falls into place.
I also think you should reconsider your port size. 36mm is what the 2,7 Carrera RS had.
Unless this is a dedicated track motor, I think DC 40s and 40 / 34 Webers is the way to go.
IMO horsepower on the dyno is great to brag about, but do you really want a motor that is a dog up to 5k rpm?
There are calculations that can be done on port size / port velocity. You might want to visit those.
FWIW, I have a SS2,5 with E cams, 35mm ports, 40mm Webers with 32mm vents. It has it's peak HP at 6,700 RPM and still pulls to my 7300 limiter.
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Gordon
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'71 911 Coupe 3,0L outlawed
#56 PCA Redwood Region, GGR, NASA, Speed SF
Trackrash's Garage :: My Garage
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