Quote:
Originally Posted by dannichols1474
So my now 2808cc 2.7L motor (92mm vs stock 90mm bore) with 69-73 911S MFI cams (duration: 264/236, lift .450/.402) versus stock CIS cams (220/200, .410/.348) still should have 1.50" headers versus 1.625" headers? I have also boosted the CR from the stock 8.5:1 to 9.8:1 - does CR have any effect on the optimal choice of header size?
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While I was wishing William "Happy Birthday!" today, I asked him about what cams he liked for a your motor. He thinks you don't have the right cams and your headers are too big. He did say you could get away with the 1 5/8" O.D. headers if you used a better cam. He would use the K45 cam. He sells them...I am not sure who makes them.