S2000 Under The Hood S2000 Technical and Mechanical discussions.

Difference between a Roots style and Centrifugal Supercharger?

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Old Apr 8, 2002 | 08:10 AM
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Default Difference between a Roots style and Centrifugal Supercharger?

Sorry if this has been posted before, but what is the design difference between a roots style and centrifugal supercharger?

Thanks!
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Old Apr 8, 2002 | 08:16 AM
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The roots style is a positive displacement twin screw type that usually make boost very quickly. The centrifugal that's more rpm and time to "spool" up. The cent. is like a belt driven turbo charger.
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Old Apr 8, 2002 | 08:56 AM
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Thanks fellas!

By the way, I saw on Eaton's site, that they make superchargers for Mercedes. Anyone know if the C32 AMG uses an Eaton?
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Old Apr 8, 2002 | 10:03 AM
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[QUOTE]Originally posted by hecash
[B]The leading edge of the impeller may not exceed a certain speed (the specific speed now escapes me.
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Old Apr 8, 2002 | 10:06 AM
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[QUOTE]Originally posted by Phantom
[B]Thanks fellas!

By the way, I saw on Eaton's site, that they make superchargers for Mercedes.
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Old Apr 8, 2002 | 10:36 AM
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Originally posted by tims2k


I think so (don't quote me on that one) they also make other s/c's like the Ford Lightning and Porsches
I found this add that they use the Eaton on the C class Mercedes...but I'm not sure if the C32 AMG has a special supercharger or something.

http://www.eaton.com/supercharger/repldisp.html

I just called a Mercedes dealership to find out if this sales ladie knew the answer...she told me it's a hand built engine and it is not supercharged...heh heh.
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Old Apr 8, 2002 | 02:40 PM
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[QUOTE]Originally posted by Phantom
[B]Thanks fellas!

By the way, I saw on Eaton's site, that they make superchargers for Mercedes.
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Old Apr 8, 2002 | 03:05 PM
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The C230K utilizes a Eaton blower.

BBSilver - The sound barrier is the limit of any blower's capabilities. Other limitations are design or mechanical, but the impellers are useless at the speed of sound. (I wonder about above that limit though?)
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Old Apr 8, 2002 | 03:14 PM
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jerry,

I'm going to take a WAG here, but I would think that after the impellers hit the speed of sound, the shock wave following the impeller motion would disrupt airflow so much as to make it useless for all (well, at least OUR) intents and purposes. I'm not sure I want to try and contain a sonic boom inside a small metal canister residing a few feet from my body.
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Old Apr 8, 2002 | 03:21 PM
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[QUOTE]Originally posted by MacGyver
[B]jerry,

I'm going to take a WAG here, but I would think that after the impellers hit the speed of sound, the shock wave following the impeller motion would disrupt airflow so much as to make it useless for all (well, at least OUR) intents and purposes.
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