Date registered: Mar 2004
Vehicle: 84 500SEL AMG, 90 560SEC AMG, 85 500SEC AMG Widebody
Location: Atlanta, GA
Mentioned: 3 Post(s)
Quoted: 78 Post(s)
Intake air volume (throttle body size, intake manifold design and engine bay hood clearance) will continue to be the primary roadblock to gaining significant performance gains for the M117. Head work, tri-y's, cams, fuel and spark systems (like Franken-CIS), increased compression ratio would get performance up to 325hp or so, but beyond that (assuming SOHC heads) is a challenge. Absent forced induction or quad cam heads, can't squeeze much more out of the M117. And getting to 325 ponies would probably cost $10-$15k.
Agree with Mike - a higher diff ratio is a good way to get noticeable performance improvement (at the expense of fuel economy - higher RPMs). Diff change and tri-y's are a sub $3k investment that would be really noticeable.
2009 W211 E63
1984 500SEL AMG -5.4L, Sebring exhaust, full suspension, 2.82 LSD, 8"/9" wheels, Recaros, door wood, Clarion rack stereo. Anthracite Grey/Black
1985 500SEC AMG Widebody, 199/278, 5.4L DOHC 32v, Sebring, suspension, fridge
1990 560SEC AMG 6.0L, 149 Arctic White/Blue
1994 E500, 147 Polar White/Grey
1990 560SEC, 199 Blue Black/Black (Japan)
1991 560SEC, 040 Black/Palomino
1961 220SEb Coupe