How screwed am I - Page 3 - MBWorld.org Forums

Mar 31, 2005 | 10:20 AM

#51

360_iti

MBWorld Fanatic!

Joined: Feb 2005

Posts: 2,255

Likes: 0

From: Bloomfield Hills, MI

W203, W211, W219, W212

hey knepster dont u have anything to say ?
u started this..

anyway keep discussing guys, im paying attention

Mar 31, 2005 | 10:32 AM

#52

CynCarvin32

MBWorld Fanatic!

Joined: Sep 2002

Posts: 2,923

Likes: 3

Mercedes Benz

Quote:

Originally Posted by 05C55

I'm not spinning anything. And for the record, the C-classs Manual which you refer to does not even list the C55 does it? The C-class compression ratios range from 8.7 on the C230 to 10 and 10.5 on the 320 and 240 and 11:1 on the C55. MB puts the same disclaimer on everything they produce regardless of the compression ratio.

that may be due to the fact that anything over a ratio of 10:1 normally requires premium fuel. If the computer is set for that grade fuel and timing is such that less oct can be problematic then you should use that grade fuel.

You also need to remember that a kompressor raises the actual compression ratio a great deal with boost. This is why kompressor cars and turbo cars are very prone to issue with low grade gas. Cars like hte ford lightning and the Saab Aero do not function well with 91 oct gas. They knock on a daily basis are really need 93 oct gas.