Re: Project Log: 320 to AMG/SRT Level
Originally Posted by JHM2K
Just because I'm bored on a snow day, what are the key differences between the ML's M112 engine, and the normal 215 hp M112?
Intake design? Cam profile?
The M112 engine came in 3.2 and 3.7L in the ML. the 3.2 is the same as in our cars at 215 HP and 229 torque. The 3.7L M112 engine puts out 232hp and 254 torque. The 3.7 would be a bolt in swap but not picking up much HP. Some tuners are claiming 252hp and 274 peak torque with the 3.7 that is a 37hp gain and 43 foot pound more torque over a 3.2. Some Schrick cams (if you can find some) and a 74mm throttle body would wake up a 3.7 even more.
If I was trying to do what Tec 9 is doing naturally aspirated. I would get a 3.7 (they are dirt cheap) mill the head to get 11:1 compression, install larger valves and clean up the ports, schrick cams, 74mm throttle body, good intake, down pipes and free flowing exhaust. This would be a healthy sounding good running n/a V6 but may still fall a little short of a stock SRT in HP, but you would have a gearing advantage which might make up the difference.
The SRT has a 3.60 first gear with a 3.07 rear gear.
A n/a Crossfire with a manual trans has a 4.46 and an auto has a 3.95 first and both have a 3.27 rear. Might be an interesting race.
Last edited by LantanaTX; Jan 10, 2011 at 11:44 AM.