M113K Upper Fixed / Clutchless S/C Pulley








Question: When you say its jerky, what exactly do you mean? Is it instant torque, or does the power make the car hop?
The Best of Mercedes & AMG




Personally, I think its sounds like something I'd probably like, unless I'm not understanding you correctly.

There is "instant torque" as soon as you stomp on the throttle in any of these cars. They have a positive displacement supercharger, not a turbo. There is zero "lag" and the supercharger engages instantly like I said as soon as the throttle position reaches a certain point so this pulley will do absolutely nothing to improve your power over a conventional pulley. What this pulley will do is get rid of the chance of a pulley clutch failure and cost less due to being less complex to make.




I hope this is what your experiencing, because that's what I'm looking for.
There is no lag/spool up on a blower on the 55K motors.
I'm no guru, but maybe I'm missing something here????




Urbanworm, thank you enlightening me. All this time I thought "Kompressor" was German for "Turbo"
Last edited by Tech-Tune; Jul 17, 2013 at 09:24 PM.
a lot of people use this term incorrectly - myself included...
it's just a matter of spinning the S/C faster with better ratios in comparison to the crank pulley - so you get more boost - faster




With the "clutchless" pulley, the by pass valve is going to be open when the car is not under peak load (or some certain load percentage) while also under some certain throttle position, so it is the same difference, you would have to "wait" for the bypass valve to close before it will build boost and "spool" as they like to put it. So there is no difference. Like I originally said, you get the peace of mind of not having a clutch that is going to break on the pulley, other than that they are the same performance wise.




so i will chime in on it as well
i got the 77 mm

I'm curious how effective the bypass will be in comparison to the clutch - could be interesting on a high-rpm downshift... could definitely impact the exhaust note depending on the RPMs




