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+--- Thread: 722.6 Torque Converter Lockup in W220 S320CDI (/showthread.php?tid=2146)
722.6 Torque Converter Lockup in W220 S320CDI - Riverstick - 01-16-2011
Looking for some information on improving the transmission on my W220 S320 CDI. The car drives very well and shifts satisfactorily. What I am planning to do is tune the engine a little(maybe 300BHP)but the CDI is a high torque low revving unit. To take maximum advantage of this I would need the shift points signicantly lower and I would like to see torque converter lockup at 1000rpm. My W211 E220CDI 722.6 automatic locks up at 1200rpm and performs magnificently whilst returning a consistent 1000km for each tankful of diesel.
(1) Do we just do this by programming....and if so is this done by an engine chiptuner or by a Merc dealer? or is there an aftermaket variable tuning box which can be installed just like some American pick up trucks.
(2) Do we intall a torque converter like this? http://www.protorqueconverters.com/2.html
(3) Do we use some Lucas oil in the transmission as we have used this in our heavy trucks with great results http://www.lucasoil.com/
(4) Should we just fit a 6 speed transmission. The availabilty of a gearbox,pedal box,pedals or the work involved etc doesn't bother me too much but can it be done electronically? In other words,can the vehicle onboard ecu(s) be reconfigured to run a manual transmission?
All points of view greatly appreciated!