Quote:
Originally Posted by bazza
Matt, my mate sent over the info about his EG33 billet cams. Massive duration!!
Intake:
318 duration (advertised)
235 duration @ 50 thou
9.9mm lift
Exhaust:
339 duration (advertised)
235 duration @ 50 thou
10.0mm lift
P.S. My cams still at shop... waiting... always waiting.
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In truth those are quite tame camshafts. They have very gentle valve openings judging by the relationship between the advertised duration and the @ .050 duration numbers. The advertised numbers don't tell the whole story.
An aggressive cam profile will tend to have faster valve openings and closings. Jack's cams by comparison have 244 @ .050 duration but with 268 advertised duration. VERY fast opening and closing ramps with very rapid valve acceleration.