SC kits with magnetic clutch?

raywong · 10-06-2012, 08:57 AM

How do the M3 SC engage/disengage? using a magnetic clutch? Or are they driven by the belt full time?

ajohnson300 · 10-06-2012, 09:41 AM

Great question man, but here is the deal. With the magnetic clutch, the clutch assembly freely spins until power is sent to the magnets, which energize causing the clutch gears to engage. Without the power, the clutch assembly is free to spin, which does not rob or require power. But under load the signal is sent, the assembly engages and now the supercharger spins. You are aware that superchargers require power to make power, so this is why so many lean towards turbos because they don't. They make power from exhaust which was being expelled anyway. But most superchargers are very reliable which is a sell for some. To recap, the gears spin freely until engaged, they are belt driven but are not always on. Hope this helps.

VCMperformance · 10-06-2012, 10:35 AM

All the SC kits out are spinning the charger 100% of the time. The only company I think that has an option for a SC disengage clutch is g-power. Hope this helps

raywong · 10-06-2012, 12:12 PM

I guess being able to disengage is not that important otherwise the Ess systems will have it too.

edwinm3 · 10-06-2012, 02:23 PM

ASA blowers use a centrifugal clutch. They're very good and it's what I had on my e46. Don't think anybody is using them on E9X applications. Very good and expensive. Torque you feel at low rpms

PrecisionSport · 10-06-2012, 02:30 PM

Quote:

Originally Posted by edwinm3

ASA blowers use a centrifugal clutch. They're very good and it's what I had on my e46. Don't think anybody is using them on E9X applications. Very good and expensive. Torque you feel at low rpms

G-Power, who exclusively uses ASA superchargers, retain the centrifugal clutch on all their current supercharger kits; including the E9X M3 kits.

I'll grab a picture of an install we're doing at the shop and take the pulley off the blower to show some detail.

spdy330 · 10-06-2012, 05:33 PM

Subscribed

pbonsalb · 10-06-2012, 05:40 PM

Does the ASA clutch disengage only at idle speed or does it disengage anytime the blower is out of boost?

pbonsalb · 10-06-2012, 05:41 PM

Quote:

Originally Posted by raywong

I guess being able to disengage is not that important otherwise the Ess systems will have it too.

ESS used to run the ASA blowers. I thhnk they changed more for simplicity of having one blower to use for all kits than out of any dislike of the ASA. Also ASA at the time did not have any really high flowing blowers.

edwinm3 · 10-08-2012, 07:39 PM

Quote:

Originally Posted by Frank@PSI

G-Power, who exclusively uses ASA superchargers, retain the centrifugal clutch on all their current supercharger kits; including the E9X M3 kits.

I'll grab a picture of an install we're doing at the shop and take the pulley off the blower to show some detail.

That is cool, ASA blowers are very good. I loved my AA kit on my E46 M3.

edwinm3 · 10-08-2012, 07:42 PM

ASA blowers give you good torque down low, it feels like a turbo. Blowers are a bit pricey, maybe that's why ESS guys are not using them anymore idk

DouglaCorbi · 10-08-2012, 08:01 PM

The only company I think that has an option for a SC disengage clutch is g-power

PrecisionSport · 10-08-2012, 08:17 PM

Quote:

Originally Posted by pbonsalb

Does the ASA clutch disengage only at idle speed or does it disengage anytime the blower is out of boost?

Only at idle speed, I believe.

edwinm3 · 10-09-2012, 03:29 AM

Quote:

Originally Posted by Frank@PSI

Quote:

Originally Posted by pbonsalb

Does the ASA clutch disengage only at idle speed or does it disengage anytime the blower is out of boost?

Only at idle speed, I believe.

You're correct

mosx · 10-09-2012, 03:47 PM

I've never heard of G-Power. How do their prices compare to ESS or the others?

10-06-2012, 08:57 AM	#1
raywong Private First Class Drives: E92M3 Join Date: Jun 2011 Location: Hong Kong Posts: 126 iTrader: (0)	SC kits with magnetic clutch? How do the M3 SC engage/disengage? using a magnetic clutch? Or are they driven by the belt full time?
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10-06-2012, 02:23 PM	#5
edwinm3 Captain Drives: 2008 JEREZ BLACK M3 Join Date: Nov 2011 Location: Doral Posts: 761 iTrader: (2)	ASA blowers use a centrifugal clutch. They're very good and it's what I had on my e46. Don't think anybody is using them on E9X applications. Very good and expensive. Torque you feel at low rpms __________________ AA Exhaust, AA X Pipe, AA SSK, AA Geen Air filter, AA Pulley, AA Tune

10-06-2012, 05:33 PM	#7
spdy330 Major General Drives: 05 Tundra, 11 M3, 08 Odyssey Join Date: Dec 2009 Location: SoCal Posts: 5,491 iTrader: (136) Garage List 2011.75 BMW M3 [4.40] 2006 BMW 330i - SOLD [5.00]	Subscribed __________________ - 2006 E90 330i TiAG retired. - 2011.75 E90 M3 - BMW Performance Exhaust, BMW Performance Grills, Lux H8 V3, IND Reflectors, Ceramic Tint 58%, Brembo 380mm BBK, V1 with custom multi-color display by www.Radar-Mirror.com - custom radar mount by www.performancepackage.com.

10-08-2012, 07:42 PM	#11
edwinm3 Captain Drives: 2008 JEREZ BLACK M3 Join Date: Nov 2011 Location: Doral Posts: 761 iTrader: (2)	ASA blowers give you good torque down low, it feels like a turbo. Blowers are a bit pricey, maybe that's why ESS guys are not using them anymore idk __________________ AA Exhaust, AA X Pipe, AA SSK, AA Geen Air filter, AA Pulley, AA Tune

10-08-2012, 08:01 PM	#12
DouglaCorbi New Member Drives: bmw Join Date: Oct 2012 Location: good Posts: 6 iTrader: (0)	The only company I think that has an option for a SC disengage clutch is g-power __________________

10-06-2012, 09:41 AM	#2
ajohnson300 Abjm3 Drives: 2008 335I, 2007 X5 4.8i Join Date: Mar 2011 Location: Fairborn, Ohio Posts: 99 iTrader: (2)	Great question man, but here is the deal. With the magnetic clutch, the clutch assembly freely spins until power is sent to the magnets, which energize causing the clutch gears to engage. Without the power, the clutch assembly is free to spin, which does not rob or require power. But under load the signal is sent, the assembly engages and now the supercharger spins. You are aware that superchargers require power to make power, so this is why so many lean towards turbos because they don't. They make power from exhaust which was being expelled anyway. But most superchargers are very reliable which is a sell for some. To recap, the gears spin freely until engaged, they are belt driven but are not always on. Hope this helps.

10-06-2012, 10:35 AM	#3
VCMperformance Private First Class Drives: Tech at vcm auto Join Date: Mar 2011 Location: Victoria, bc Canada Posts: 123 iTrader: (0)	All the SC kits out are spinning the charger 100% of the time. The only company I think that has an option for a SC disengage clutch is g-power. Hope this helps

10-06-2012, 12:12 PM	#4
raywong Private First Class Drives: E92M3 Join Date: Jun 2011 Location: Hong Kong Posts: 126 iTrader: (0)	I guess being able to disengage is not that important otherwise the Ess systems will have it too.

10-06-2012, 05:40 PM	#8
pbonsalb Major Drives: 08 E90 M3, 99 E36 M3 Turbo Join Date: Feb 2011 Location: Concord, NH Posts: 1,170 iTrader: (3)	Does the ASA clutch disengage only at idle speed or does it disengage anytime the blower is out of boost?

10-09-2012, 03:47 PM	#15
mosx The mod bug has bitten. Drives: 2008 M3 Sedan Join Date: Jun 2010 Location: North Texas Posts: 525 iTrader: (1) Garage List 2008 BMW M3 [0.00]	I've never heard of G-Power. How do their prices compare to ESS or the others?

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