View Single Post
Old 05-16-2011, 04:51 PM   #131
Rob43
Hates Low RPM !
 
Rob43's Avatar
 
Join Date: Oct 2009
Location: Richmond VA
Posts: 4,191
My Ride: 03 331Ci 5spd R1200R
Quote:
Originally Posted by NickG@TechniqueTuning View Post
So are you saying that a set of factory OEM cams, made and sold by BMW, are suspect to failing?
That's not at all what I am saying.

Please don't make assumptions for me.

OF COURSE AVL SCHRICK GmbH are hardened, they are Chilled hardened.


"Why are SCHRICK camshafts so special ?

They are machined to precise tolerances,
using the latest CNC machines.
They are usually made from expensive, extremely
wearresistant “chilled” cast-iron.
Warranty: 1 year without kilometer limitation."

CHILLED HARDENED:

"Chilled cast iron outperforms traditional induction-hardened cast iron billets typically found in the U.S. Cast iron cams are typically used for flat tappet applications whereas steel cams are used for roller follower applications.

In this process, surface hardening of the cams is obtained by locating metal chills in the mold. These chills act as quenches which remove heat rapidly. The rapid cooling makes the material near the chill much harder than the surrounding material without the chill. The hardening depth goes much beyond any other process. Other types of hardening only produce a thin "scab" hardness with very soft metal underneath."

Have a great day.
__________________



Rob #43 ITS/ITR/STU, BMW 325I, STU LAP RECORD
SUMMIT POINT WV 1:24:229 S.C.C.A.
(DynoDynamics https:vimeo.com/8486878 Dyno Video)
"Chance Favors The Prepared Mind"

Need Help With Your Nitrous Ambitions ?.....PM ME
Quote:
Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
Rob43 is offline   Reply With Quote