m103 head mods
01-17-2008, 12:46 AM
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1989 190E 3.0L 5speed
m103 head mods
Has anyone heard of (or better yet tried) shaving the cylinder head down slightly to increase the compression in the engine? I am in a machining class so since tools needed are available I wanted to try it out. Also if anyone knows the stock compression for a 1990 m103 I would really appreciate it. 
01-17-2008, 08:34 AM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Has anyone heard of (or better yet tried) shaving the cylinder head down slightly to increase the compression in the engine? I am in a machining class so since tools needed are available I wanted to try it out. Also if anyone knows the stock compression for a 1990 m103 I would really appreciate it.
Milling the head will increase compression, take too much off and you may have pistons hitting valves.
Best to CC each combustion chamber in the head to make them equal with machining.
Porting and polishing the intake runners along with a competition valve job will also be beneficial
01-18-2008, 09:41 AM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
"Too much to shave"....varies from head to head as there is a manufacturing tolerance, so all heads not equal.
