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JohnWB · Nov 23rd, 2003, 04:12 PM

This may seem like a daft question but on some cars the supercharger is only engaged when you need the extra power as this saves having to drive the superchager all the time and waste power. I have always assumed that it was engaged full time on the MCS but I htought I would ask. Regards John

Spacer · Nov 23rd, 2003, 05:03 PM

But, I do remember something about there being a bypass value, that below a certain RPM (I believe 3000 was mentioned), the bypass value is open, allowing the air to miss the supercharger blades. The reasoning behind this was that it was creating more drag than compression. Sorry if the facts aren't quite right, and anyone who can either link to the thread, or correct me, then feel free.

GTmini · Nov 23rd, 2003, 06:35 PM

I've also heard the same thing that Spacer has

Andy@Ross-Tech.com · Nov 23rd, 2003, 09:53 PM

Spacer is right, there is a bypass valve. Basically, when not under load, air pressure is balanced between the inlet and outlet of the supercharger. So, the supercharger is spinning, but it is spinning in air, not using much power.

obehave · Nov 24th, 2003, 01:42 PM

I think the original question may be worded a bit oddly. The SC is always engaged. It's just not always using the output.
All SCs are always engaged.

Just to clarify it's not the Mad Max flip a switch Supercharger

JohnWB · Nov 24th, 2003, 02:30 PM

Thanks for all the replys,
its just the Mad Max Drivers who have the cars

Nov 23rd, 2003, 04:12 PM	#1
JohnWB MINI2 Regular Join Date: Sep 2003 Location: Middlesbrough, UK Local Time: 10:42 AM Posts: 324 Offline	Is the MCS supercharger always engaged This may seem like a daft question but on some cars the supercharger is only engaged when you need the extra power as this saves having to drive the superchager all the time and waste power. I have always assumed that it was engaged full time on the MCS but I htought I would ask. Regards John Laser Blue / Black MCS - Arived March 07

Nov 23rd, 2003, 09:53 PM	#4 (permalink)
Andy@Ross-Tech.com MINI2 Master Join Date: Oct 2002 Location: Lansdale, PA Local Time: 05:42 AM Posts: 1,338 Offline	Spacer is right, there is a bypass valve. Basically, when not under load, air pressure is balanced between the inlet and outlet of the supercharger. So, the supercharger is spinning, but it is spinning in air, not using much power. '03 MCS The Unofficial MINI 1/4 Mile Dragracing Database

Nov 24th, 2003, 02:30 PM	#6 (permalink)
JohnWB MINI2 Regular Join Date: Sep 2003 Location: Middlesbrough, UK Local Time: 10:42 AM Posts: 324 Offline	Thanks for all the replys, its just the Mad Max Drivers who have the cars Laser Blue / Black MCS - Arived March 07

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Nov 23rd, 2003, 05:03 PM	#2 (permalink)
Spacer MINI2 Regular Join Date: Sep 2003 Location: Northern Ireland, bu Local Time: 10:42 AM Posts: 174 Offline	But, I do remember something about there being a bypass value, that below a certain RPM (I believe 3000 was mentioned), the bypass value is open, allowing the air to miss the supercharger blades. The reasoning behind this was that it was creating more drag than compression. Sorry if the facts aren't quite right, and anyone who can either link to the thread, or correct me, then feel free.

Nov 23rd, 2003, 06:35 PM	#3 (permalink)
GTmini MINI2 Senior Join Date: Jan 2003 Location: Los Angeles, CA Local Time: 02:42 AM Posts: 458 Offline	I've also heard the same thing that Spacer has

Nov 24th, 2003, 01:42 PM	#5 (permalink)
obehave Mini Mod Join Date: Sep 2002 Local Time: 05:42 AM Posts: 9,388 Offline	I think the original question may be worded a bit oddly. The SC is always engaged. It's just not always using the output. All SCs are always engaged. Just to clarify it's not the Mad Max flip a switch Supercharger

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