M104 Cylinder Head differences... - PeachParts Mercedes-Benz Forum

JayRash · #1 01-17-2010, 03:15 PM

i know im off topic but bare with me

the M104 2.8 seems really good for a high rev conversion, fit solid lifters and stronger vavlve springs with stand alone ecu and a good cam and this engine can rev to over 8k safe since piston speed should be lower due to the crank it has, thus piston rings wont flutter at high revs.

AustinsCE · #2 01-17-2010, 03:31 PM

Quote:

Originally Posted by JayRash

i know im off topic but bare with me

the M104 2.8 seems really good for a high rev conversion, fit solid lifters and stronger vavlve springs with stand alone ecu and a good cam and this engine can rev to over 8k safe since piston speed should be lower due to the crank it has, thus piston rings wont flutter at high revs.

Precisely what I plan to do!

MAG58 · #3 01-17-2010, 04:04 PM

Quote:

Originally Posted by JayRash

i know im off topic but bare with me

the M104 2.8 seems really good for a high rev conversion, fit solid lifters and stronger vavlve springs with stand alone ecu and a good cam and this engine can rev to over 8k safe since piston speed should be lower due to the crank it has, thus piston rings wont flutter at high revs.

If you're looking at mean piston speed, the 2.8 can go to 10.5k iirc before piston speed becomes an issue, the 3.0 can go well above 9. (assuming 25m/s max piston speeed). If you really want a screaming engine, build a long rod 3.0 with the smaller (lighter) pistons so you can have the 3.0 bore, long r/s ratio (well above 1.75) which should produce less piston acceleration at the extremes leading to a VERY smooth high strung engine.