Cams

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OEM

S4 RS4 NA 2.8
I E I E I E
duration [1.0mm] 190° 226° 210° 226° 210° 226°
valve lift 7.5mm 8.2mm 8.8mm
peak angle 110° 110° 112° 112°
timing [1.0mm] -10/20° 38/8° 38/8° -12/42° 38/8°

Aftermarket

CAT Revolver Piper
1004050 1004051 001 grind 002 grind Mild Race
I E I E I E I E I E I E
Duration [0.1mm] 239° 245° 267° 280° 248° 258° 200° 210°
Duration [1.0mm] 214° 220° 226° 232° 256° 256° 244° 274°
Valve lift 8.80mm 10.85mm 9.25mm 11.00mm 8.9mm 10.5mm 7.7mm 9.7mm 8.26mm 9.44mm 8.69mm 10.93mm
Peak angle 110° 110° 110° 110° 110° 110° 110° 110° 110° 110° 104° 108°
Timing [1.0mm] -3/37° 40/0° 3/43° 46/6° -10/20° 38/8° -10/20° 38/8° 18(?)/58° 58/18° 18(?)/46° 65/29°
Lift at TDC 0.70mm 1.00mm 1.30mm 1.70mm
  • The Piper intake timing still does not look right. should it be -18?