Eurocharged offering clutchless/fixed M113K V8 (W211 E55 AMG) supercharger pulleys, picture and dyno
The M133K motor used in supercharged 55 AMG V8 models such as the W211 generation E55 AMG features supercharger pulleys that use a clutch to engage and disengage. Eurocharged is offering a supercharger pulley for the M113K in a variety sizes which is a fixed design. That means there will no longer be a clutch to engage or disengage the pulley and with this comes additional risk as the ECU will not be able to disengage the pulley should it need to in order to protect the motor.
That said there are a number of benefits to this design including greater throttle response and lower rotational mass. It all boils down to extracting as much power as possible. A tune to compliment this pulley design is necessary which Eurocharged does offer.
Pulley sizes as well as dynograph with tune below. Output will change depending on pulley size chosen.
77mm = 180 crank size equivalent
80mm = 175 crank size equivalent
83mm (smaller sc pulley) = 168 crank equivalent
89mm = stock sc pulley size