tommy

Think we'd have to find a moderator with a sense of humor first.

MB-BOB

LOL! You're exactly right. It'll be just the ticket to part the throngs at the Mall during the Christmas rush. Then, you can buy 18" chromies for that carriage at a HUGE discount during the January White sales...

MB-BOB

Hey, no comments from the peanut gallery!

I'm surprised you didn't ask me if I knew Groucho Marx personally, being that I'm ancient, and all that.

(Yes, that's a straight line, freely offered. So be gentle. )

Buellwinkle

Did anyone notice that the NA Blow Off Valve comes in Kleemann pink? Coincidence? I don't think so.

trench

A centrifugal supercharger is most similar in overall design (with regard to flow dynamics) to a turbocharger. It essentially acts as a high-speed fan, and under certain conditions air can flow backward through the compressor when the throttle is snapped shut. It therefore requires a bypass valve to prevent compressor surge. This doesn't occur with a fixed-displacement supercharger - such as the roots type (C230K) or twin screw type (C32) - where air can only flow one direction.

Cheers, BT

Boo2

Hey, I actually agree with you. Why can't people understand that if you love something and have the money, not everything you buy has to be functional as long as it makes you happy. I laughed when my dad put a plasma tv in his kitchen, but it makes him happy even if he doesn't cook or even go in that room.

Buellwinkle

I think what they need to make is a boost controller for our cars similar to the NA BOV. When you crank it up the speaker would play a louder turbo whine, maybe even amplify the S/C whine using a microphone and speakers. I know they already make a box that plays the sounds of burning rubber. Also what would be great is to record a Ferrari exhaust into a synthesizer and play that based on throttle position and RPM. That would be way cheaper than some of the near $1,000 mufflers out there and net out the same performance and better, more controllable sound.


(It's a joke MB-Bob, don't get your panties in a knot. Here, I'll put some smily faces to help you understand )

MB-BOB

Buell, I'm completely with you on this one, so no titty-pinchers here, bud.

Now, if you were to say, "Besides, the NA BOV Noisemaker would probably be the most reliable feature of the car, especially when the faulty electronics make it sound off (at rest) during it's frequent hiatuses at the dealer service department..." well, then I might get tense...

BTW, I'm on board with (and quoted) your remarks on the "supercharger" thread, too. Just shows we can agree on some threads and disagree on others.

Lucas

Hi guys, you are a little off here.

The 230 K have a blow off valve ( look at your air filter box ).

The reason is that MB runs with the throttle on the pressure side
of the supercharger, when the throttle is closed and the engine still is up in speed, the compressor will still boost and create 3-4
bars pressure on the throttle, if the bypass wasen't there.
When you open the inlet throttle, the bypass will close and opposit.
KLEEMANN and AMG have the throttle on the inlet side on the compressor, why bypass not is needed, when the throttle is closed, no air will enter the supercharger.
AMG do not use bypass - KLEEMANN does.
The bypass in the KLEEMANN system, brings down temperatures
in the system when the engine runs off boost ( part loads ) and gives better milage.
All centrifugal kits boost on the throttle, why it would be a crime
not to build in a bypass.

So to fit a BOV on your cars will be a little off, it's already there.

Buellwinkle

Sure get technical when I was just begining to have fun!

young

um... what does the BOV look like? i'm looking at the air filter box, where the ITG filter goes...

tb2

...well it was a technical question...

dswildfire

the bypass valve is already built-in on the Eaton M45 4th generation. it's part of the s/c itself.

trench

I stand corrected with regards to saying roots type superchargers don't need a bleed valve. My knowledge of superchargers is a little dated as I'm more familiar with a blower that has a couple of Holleys sitting on top of it than these new fangled contraptions used by MB. I guess I should have thought a little harder about the M111's set-up, because after Lucas mentioned it, I remebered that the throttle was between the SC and the intake manifold and that the Coupe does indeed have a bleed valve.

Anyways the Coupe's BOV can't be heard releasing pressure because it releases the pressure back into the manifold upstream of the SC for NVH reasons.

Cheers, BT

Buellwinkle

So then you do need the NA BOV so you can hear the Psssh sound. Worth the $340 either way.

Spyke

As you probably know, this has already been done. Many years ago in fact. Back in the day when a lot of companies were still playing around with active noise cancellation there was one company (British, I think?) that outfitted some little four banger with their latest system. It was tied in to the engine management and make the car sound like a V12, a V8, or a couple others if I remember right. Of course this was all interior sound, the exterior still sounded like a four cylinder...