2.7 with carbs, E or 964? Options

[scotty b]

I am gathering parts for MY car (for a change) which I hope to start on next year. I will be building a 2.7 maybe (probably) with Je pistons. Weber carbs but not sure what cams to go with. E and 964 cams seem to be the most popular, but which is better? I would like real world opinions please. Is one better with stock pistons and one better for JE's (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Thanks for the help (IMG:http://www.914world.com/bbs2/html/emoticons/mueba.gif)

[don9146]

Everyone seems to have forgotten the Solex cams (except for Perry) that came on the early year 911s. Their profile is between the "E" and "S" cams from later 911s. I have one on my 2.7 liter 9146 with Weber carbs, 8.5 to 1 RS pistons, mild port and polish, and GT racing headers. It pulls from ANY RPM, making 1st gear almost (but not quite) pointless (Perry has driven it a few times as well). I would recommend that cam as the "mildest" I would use on a 2.7.
If you are going with a port and polish, match porting, and higher compression pistons, I would think that an "S" cam would be a great match with that displacement engine.
As for 964 cams, everyone else has said it laready; they are popular with the CIS crowd. Its profile seems to be the most radical that can be used with a CIS system. I would avoid it with Webers. It would probaby work OK, but there are more radical cams you can use since you are not constrained by the limitations of CIS.