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I'm no expert either ...
But, I have a similar setup: 2.8L with 10.5:1 compression, S cams and heads (cut). Currently, the Webers have:
36 mm venturi
195 air corrector
150 mains
F3 e-tube
I believe I'm running lean up top and plan to install 180 air correctors this weekend. Other than that, I pulls like a banshee from about 2,000.
My impression is the F3 tube is the common performance setup on Porsche engines. The 170 main seems big. I'd call Steve at Rennsport Systems or Richard at PMO for guidance.
Greg
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Greg
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