Quote:
Originally Posted by papasmurf_m3
I used to look for cams from schrick for the S55 engine. Could never find them. I guess these are kinda new? Great company with a very long history of making cams for BMW.
So, I'm guessing these are drop ins that will work with stock valve springs an retainers. Probably gonna be pretty mild. But. I'm sure a substantial increase over stock.
Even with bigger turbos the power starts dropping off after 6k-7k rpm. If you can put big enough cams it could rev to 8,000 and make power past 7k rpm.
Another good thing, is valve springs and retainers are already available. The 3.0L S55 has great bore to stroke ratio which means it likes to rev, the head flows pretty good. Just need cams to make power at higher rpm's and we should see a big jump in performance.
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The popular cams on evos are generally 272 or 274. I don’t know what the stock cam grind is on the f80, but 238 is super mild for the one side.