QUOTE(seanery @ Dec 28 2003, 08:25 AM)
2.7 RS pistons, webers, headers, ported heads, E cams... this is a track car. Is there a better set of cams?
Anyone have a webpage or FAQ that could help direct me?
you have Anderson's 911 Performance Handbook, right ? good section in there on cam characterisation. give me a couple hours and i'll see if i can find cam specs from the 2,7RS - i have -the- 'Carrera RS' book and all that stuff is listed if i can't find it in '911 Story'.
several people lately have reported very good results with 'S' cams. while they're peaky in the little motors the word is they mellow out with increased displacement.
if you're using 'E' cams, you're going to be limited to 3-bearing (early) cams unless you want to upgrade to later-style 4-bearing cam boxes... all the 'new profile' GE cams, fr instance, are ground on 4-bearing billets (as are, IIRC, the 964 cams Mikey recommends ...)
as always - condition of the valve train (double springs, etc...) must be consistent with the total lift provided by the 'S' cams. and you must be -very- careful about piston-valve clearance of course ...
the '906' and 'RSR Sprint cams' have good reputations on the track - but i don't remember when the cam bearing change was made to know if the RSR Sprint cams are 3- or 4-bearing styles ...
i have 'E' cams in the 911 (it's an E!) but also in the 2,0 /6 with the original 40IDTP13C Webers - albeit with larger venturiis and some other detail tweaks... runs nice ... early 'S' cams may be the ticket for your application, tho ...