dyno

I frequently have a look at this magnific forum wandering whether to mod or not my 55 and realize how ignorant i am ..

so, have been told that these MODDED ACTUATORS, that stands left and right close to the SC pulley on top, HELP INCREASE BOOST

they are inserted to the cylinders intake ... so they do channel something .. but strangely, in correspondence of the front cilinders only.
What for?

thanks
Marco

enzom

non ho nessun' idea.

dyno

perhaps they feel depression/vacuum and thus engage/disengage the SC ?


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di dove sei Enzo?

chiromikey

are those the wittenhour (sp) dump valves...or whatever? if so there was a long debate about them about a month ago.

dyno

dont know what is wittenhour ..
those things were said to increase 0.3 bar boost
further they aren't cheap: aske dme about 1500 eur

perhaps there is something true: I found a german tuner claiming to obtain something like a 0,12 rise in boost without changing of crank pulley (that he considered a too hard mod for the engine) .. I thought he could obtain that result by means of ecu remapping ..

After that, I asked a well known american producer of pulleys and he confirmed me that "there are ways to increase boost from a blower with out speeding it up"

these shots taken from another 3d shows clearly that the SLR-like tuning do have those modded actuators
https://mbworld.org/forums/w211-amg/214817-leemann-slr-coolers-installed.html
but the russian tuners .. still have oem

dyno

.. found it
https://mbworld.org/forums/showthrea...ht=dump+valves

thanks



ps: unfortunately, no clear result out of that debate.
Hope Finny is trying to tune those valve for his endless Awe project