MINI2

Tommy R · Mar 11th, 2007, 06:33 PM

i just cant get my head around this reduced pulley idea..
here is the thing.
eventually i want to upgrade to 200bhp.
works kit is very expensive

and im very tempted to scew it and go for the lcs1 package.

but the thing is this reduced pulley business worrys me....
surely reducing the pulley size will mean the supercharger is always working harder then its meant to, there for risking reliablility ???
and wll you loose out on top end power aswell( not that its important)

after all the works kite gets a complete new supercharger so that must say something

thanks
tom

ScottyBoy · Mar 11th, 2007, 06:42 PM

The works kit S'charger is the same but with a smaller pulley as far as im aware!

Tommy R · Mar 11th, 2007, 06:44 PM

really!?
wel in the prono vid it says you get a whole new supercharger

ScottyBoy · Mar 11th, 2007, 06:46 PM

You do get a brand new supercharger but its exactly the same as the 1 on the car already just its got a smaller pulley already installed on the new unit getting fitted!

Tommy R · Mar 11th, 2007, 06:53 PM

ahahahaahah now way thats ridiculous!

wel i guess there is only one thing to do... buy a smaller pulley if that is the case?

1320autos · Mar 11th, 2007, 07:25 PM

What year is your car Tommy R?

Tommy R · Mar 11th, 2007, 07:33 PM

2005 jun

Berthil · Mar 11th, 2007, 08:29 PM

The pre-facelift MCS has a grey coating on the supercharger rotors. The Works supercharger on a pre-facelift has a dark coating on the supercharger. The dark coating gives a higher pressure and can withstand higher temperatures a a result of the higher rpm's and compression.

All facelift MCS' have the ' Works' supercharger, the dark coating. Thus only the pulley is smaller. This is only a warranty question and pulling of a pulley can be very difficult.

So if you have a facelift MCS there is no problem. I drove around with a pre-facelift compressor and a Works pulley size and just changed to a facelift compressor this weekend. My old compressor looked a 100% after 60k miles, no damage to the coating, but I have seen pre-facelift compressors with a damaged coating (resulting in pressure loss), but these were used at higher rpm's than a works.

Tommy R · Mar 11th, 2007, 08:51 PM

awsome mate thanks for that
i feel much more confident about fitting a reduced pulley now as mine is 2005
TA

Capsaisin · Mar 11th, 2007, 10:06 PM

The reason that the JCW kit has a new supercharger, is so that the BMW/MINI technicians don't have to pull off the s/c pulley and refit a smaller one. It's easier to fit a whole new assembly with the pulley already fitted at the factory - it is heat shrunk in place.

Yes the s/c is working harder, but so many people have 15 or 17% pulleys it's really not an issue. Any major problems would be obvious by now.

norm03s · Mar 11th, 2007, 10:22 PM

No problems on mine with 17% for 3+ years.

chrisflyer · Mar 12th, 2007, 01:22 PM

Hi,

I have a JCW 2005 Mini Cooper S
THE SUPPERCHARGER IS NOT THE SAME AS THE STANDARD
The One in the JCW has not only a reduced pulley some were between 14-15% IT HAS ALSO BEEN POLISHED I BELIEVE

Berthil · Mar 12th, 2007, 01:39 PM

The JCW pulley is 14,6%

You can write capitols if you want but the JCW supercharger is not polished.

Capsaisin · Mar 12th, 2007, 04:15 PM

Quote: Originally Posted by chrisflyer (original)

Hi,

I have a JCW 2005 Mini Cooper S
THE SUPPERCHARGER IS NOT THE SAME AS THE STANDARD
The One in the JCW has not only a reduced pulley some were between 14-15% IT HAS ALSO BEEN POLISHED I BELIEVE

JCW supercharger, which has coated rotors, is the same as those fitted to the MCS post July 2004, with the exception of the pulley size.

There is a rumour however, that the drive ratio to the water pump might be different, but I've seen no proof either way.

MINIMANIAUK · Mar 12th, 2007, 06:06 PM

The JCW conversion supercharger is exactly the same as the post 04 standard chargers,it is not easier to replace the charger than replace with a smaller pulley,It does however allow a greater price to be charged for the conversion!
Many pulley changes have been done on the cooper s and the 15% still remains within the max speed of the charger at full engine rpm without major long term issues,smaller pulleys work fine provided the max rpm is not continually used as in a track car-this will ultimately reduce the life of the charger
Luckily the large number of JCW conversions carried out has meant that replacement chargers are fairly cheap and available,like wise for the cylinder heads ,although in time this will not always be the case

Tommy R · Mar 12th, 2007, 09:22 PM

thanks for all the replies.
im going to looks at the lc1 kit.
no way am i going to spend all the money on the jcw kit,
that was my only worry
Tom

Damo · Mar 12th, 2007, 09:47 PM

Quote: Originally Posted by Berthil (original)

The pre-facelift MCS has a grey coating on the supercharger rotors. The Works supercharger on a pre-facelift has a dark coating on the supercharger. The dark coating gives a higher pressure and can withstand higher temperatures a a result of the higher rpm's and compression.

All facelift MCS' have the ' Works' supercharger, the dark coating. Thus only the pulley is smaller. This is only a warranty question and pulling of a pulley can be very difficult.

So if you have a facelift MCS there is no problem. I drove around with a pre-facelift compressor and a Works pulley size and just changed to a facelift compressor this weekend. My old compressor looked a 100% after 60k miles, no damage to the coating, but I have seen pre-facelift compressors with a damaged coating (resulting in pressure loss), but these were used at higher rpm's than a works.

Basicly what he said, BUT...

Original 163bhp S, has an Eaton 3 Supercharger (No coating to protect the fins).
The original JCW conversion to 200bhp replaced the supercharger with an Eaton 4 Supercharger (coated fins) which also had a smaller pulley.

The Facelifted 170bhp S got the eaton 5 Supercharger (better supercharger (not sure why) and coating on the fins)
New 210bhp JCW Conversions also have the Eaton 5 Supercharger with a smaller pulley.

So basicly if you have a facelifted S your laughing

Damo · Mar 12th, 2007, 09:53 PM

Quote: Originally Posted by Berthil (original)

The JCW pulley is 14,6%

You can write capitols if you want but the JCW supercharger is not polished.

He might be referring to the 225bhp John Cooper Motorsport conversion for the 210bhp JCW. It also contains a whole new supercharger. No mention of the pulley size, but that IS ported or polished or something of that nature.

Damo · Mar 12th, 2007, 09:56 PM

Quote: Originally Posted by Tommy R (original)

thanks for all the replies.
im going to looks at the lc1 kit.
no way am i going to spend all the money on the jcw kit,
that was my only worry
Tom

Good lad ;-)

I was looking at the 16% M7 Pulley, simply due to its bigger protection it has over the Alta for preventing the pulley slipping. However the Alta Pulley version 2.0 desposes of that as it to has the same protection

Tommy R · Mar 12th, 2007, 10:17 PM

is the alta pulley the one used in the lcs1 kit?

Mar 11th, 2007, 06:33 PM	#1
Tommy R MINI2 Regular My Classifieds Join Date: Dec 2006 Local Time: 02:53 AM Posts: 60 Offline	smaller pulley? please convince me i just cant get my head around this reduced pulley idea.. here is the thing. eventually i want to upgrade to 200bhp. works kit is very expensive and im very tempted to scew it and go for the lcs1 package. but the thing is this reduced pulley business worrys me.... surely reducing the pulley size will mean the supercharger is always working harder then its meant to, there for risking reliablility ??? and wll you loose out on top end power aswell( not that its important) after all the works kite gets a complete new supercharger so that must say something thanks tom

Mar 11th, 2007, 07:25 PM	#6 (permalink)
1320autos MINI2 Master Join Date: Jul 2005 Location: Beds Cambs Northants Local Time: 02:53 AM Posts: 1,928 Offline	What year is your car Tommy R? Slicks 11.77@115.92mph Street tyres 12.162 @ 119.02 IT'S NOT HOW MUCH YOU SPEND BUT HOW WELL YOU SPEND IT

Mar 11th, 2007, 08:29 PM	#8 (permalink)
Berthil MINI2 Senior Join Date: Dec 2004 Location: Sittard (NL) Local Time: 03:53 AM Posts: 739 Offline	The pre-facelift MCS has a grey coating on the supercharger rotors. The Works supercharger on a pre-facelift has a dark coating on the supercharger. The dark coating gives a higher pressure and can withstand higher temperatures a a result of the higher rpm's and compression. All facelift MCS' have the ' Works' supercharger, the dark coating. Thus only the pulley is smaller. This is only a warranty question and pulling of a pulley can be very difficult. So if you have a facelift MCS there is no problem. I drove around with a pre-facelift compressor and a Works pulley size and just changed to a facelift compressor this weekend. My old compressor looked a 100% after 60k miles, no damage to the coating, but I have seen pre-facelift compressors with a damaged coating (resulting in pressure loss), but these were used at higher rpm's than a works. EB/W R53 MCS Highly Modified

Mar 11th, 2007, 10:22 PM	#11 (permalink)
norm03s MINI2 Regular Join Date: Mar 2003 Location: EllicottCityMaryland Local Time: 09:53 PM Posts: 163 Offline	No problems on mine with 17% for 3+ years. "I have no data yet. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories instead of theories to suit facts." - Sir Arthur Conan Doyle

Mar 12th, 2007, 01:22 PM	#12 (permalink)
chrisflyer MINI2 Regular Join Date: Aug 2006 Local Time: 02:53 AM Posts: 166 Offline	JCW Suppercharger Hi, I have a JCW 2005 Mini Cooper S THE SUPPERCHARGER IS NOT THE SAME AS THE STANDARD The One in the JCW has not only a reduced pulley some were between 14-15% IT HAS ALSO BEEN POLISHED I BELIEVE

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Mar 11th, 2007, 06:42 PM	#2 (permalink)
ScottyBoy Obsessive Car Cleaner OCC My Classifieds Join Date: Jul 2006 Location: Thornaby NE Local Time: 02:53 AM Posts: 2,874 Offline	The works kit S'charger is the same but with a smaller pulley as far as im aware!

Mar 11th, 2007, 06:44 PM	#3 (permalink)
Tommy R MINI2 Regular My Classifieds Join Date: Dec 2006 Local Time: 02:53 AM Posts: 60 Offline	really!? wel in the prono vid it says you get a whole new supercharger

Mar 11th, 2007, 06:46 PM	#4 (permalink)
ScottyBoy Obsessive Car Cleaner OCC My Classifieds Join Date: Jul 2006 Location: Thornaby NE Local Time: 02:53 AM Posts: 2,874 Offline	You do get a brand new supercharger but its exactly the same as the 1 on the car already just its got a smaller pulley already installed on the new unit getting fitted!

Mar 11th, 2007, 06:53 PM	#5 (permalink)
Tommy R MINI2 Regular My Classifieds Join Date: Dec 2006 Local Time: 02:53 AM Posts: 60 Offline	ahahahaahah now way thats ridiculous! wel i guess there is only one thing to do... buy a smaller pulley if that is the case?

Mar 11th, 2007, 07:33 PM	#7 (permalink)
Tommy R MINI2 Regular My Classifieds Join Date: Dec 2006 Local Time: 02:53 AM Posts: 60 Offline	2005 jun

Mar 11th, 2007, 08:51 PM	#9 (permalink)
Tommy R MINI2 Regular My Classifieds Join Date: Dec 2006 Local Time: 02:53 AM Posts: 60 Offline	awsome mate thanks for that i feel much more confident about fitting a reduced pulley now as mine is 2005 TA

Mar 11th, 2007, 10:06 PM	#10 (permalink)
Capsaisin cave capsicum Join Date: Mar 2006 Location: Crewe Local Time: 02:53 AM Posts: 3,366 Offline	The reason that the JCW kit has a new supercharger, is so that the BMW/MINI technicians don't have to pull off the s/c pulley and refit a smaller one. It's easier to fit a whole new assembly with the pulley already fitted at the factory - it is heat shrunk in place. Yes the s/c is working harder, but so many people have 15 or 17% pulleys it's really not an issue. Any major problems would be obvious by now.

Mar 12th, 2007, 01:39 PM	#13 (permalink)
Berthil MINI2 Senior Join Date: Dec 2004 Location: Sittard (NL) Local Time: 03:53 AM Posts: 739 Offline	The JCW pulley is 14,6% You can write capitols if you want but the JCW supercharger is not polished. EB/W R53 MCS Highly Modified

Mar 12th, 2007, 04:15 PM	#14 (permalink)
Capsaisin cave capsicum Join Date: Mar 2006 Location: Crewe Local Time: 02:53 AM Posts: 3,366 Offline	Quote: Originally Posted by chrisflyer (original) Hi, I have a JCW 2005 Mini Cooper S THE SUPPERCHARGER IS NOT THE SAME AS THE STANDARD The One in the JCW has not only a reduced pulley some were between 14-15% IT HAS ALSO BEEN POLISHED I BELIEVE JCW supercharger, which has coated rotors, is the same as those fitted to the MCS post July 2004, with the exception of the pulley size. There is a rumour however, that the drive ratio to the water pump might be different, but I've seen no proof either way.

Mar 12th, 2007, 06:06 PM	#15 (permalink)
MINIMANIAUK MINI2 Sponsor Join Date: Mar 2006 Local Time: 02:53 AM Posts: 1,035 Offline	The JCW conversion supercharger is exactly the same as the post 04 standard chargers,it is not easier to replace the charger than replace with a smaller pulley,It does however allow a greater price to be charged for the conversion! Many pulley changes have been done on the cooper s and the 15% still remains within the max speed of the charger at full engine rpm without major long term issues,smaller pulleys work fine provided the max rpm is not continually used as in a track car-this will ultimately reduce the life of the charger Luckily the large number of JCW conversions carried out has meant that replacement chargers are fairly cheap and available,like wise for the cylinder heads ,although in time this will not always be the case www.minimaniauk.com

Mar 12th, 2007, 09:22 PM	#16 (permalink)
Tommy R MINI2 Regular My Classifieds Join Date: Dec 2006 Local Time: 02:53 AM Posts: 60 Offline	thanks for all the replies. im going to looks at the lc1 kit. no way am i going to spend all the money on the jcw kit, that was my only worry Tom

Mar 12th, 2007, 09:47 PM	#17 (permalink)
Damo MINI2fosi My Classifieds Join Date: Nov 2001 Location: MINItorque.com Local Time: 02:53 AM Posts: 10,650 Offline	Quote: Originally Posted by Berthil (original) The pre-facelift MCS has a grey coating on the supercharger rotors. The Works supercharger on a pre-facelift has a dark coating on the supercharger. The dark coating gives a higher pressure and can withstand higher temperatures a a result of the higher rpm's and compression. All facelift MCS' have the ' Works' supercharger, the dark coating. Thus only the pulley is smaller. This is only a warranty question and pulling of a pulley can be very difficult. So if you have a facelift MCS there is no problem. I drove around with a pre-facelift compressor and a Works pulley size and just changed to a facelift compressor this weekend. My old compressor looked a 100% after 60k miles, no damage to the coating, but I have seen pre-facelift compressors with a damaged coating (resulting in pressure loss), but these were used at higher rpm's than a works. Basicly what he said, BUT... Original 163bhp S, has an Eaton 3 Supercharger (No coating to protect the fins). The original JCW conversion to 200bhp replaced the supercharger with an Eaton 4 Supercharger (coated fins) which also had a smaller pulley. The Facelifted 170bhp S got the eaton 5 Supercharger (better supercharger (not sure why) and coating on the fins) New 210bhp JCW Conversions also have the Eaton 5 Supercharger with a smaller pulley. So basicly if you have a facelifted S your laughing

Mar 12th, 2007, 09:53 PM	#18 (permalink)
Damo MINI2fosi My Classifieds Join Date: Nov 2001 Location: MINItorque.com Local Time: 02:53 AM Posts: 10,650 Offline	Quote: Originally Posted by Berthil (original) The JCW pulley is 14,6% You can write capitols if you want but the JCW supercharger is not polished. He might be referring to the 225bhp John Cooper Motorsport conversion for the 210bhp JCW. It also contains a whole new supercharger. No mention of the pulley size, but that IS ported or polished or something of that nature.

Mar 12th, 2007, 09:56 PM	#19 (permalink)
Damo MINI2fosi My Classifieds Join Date: Nov 2001 Location: MINItorque.com Local Time: 02:53 AM Posts: 10,650 Offline	Quote: Originally Posted by Tommy R (original) thanks for all the replies. im going to looks at the lc1 kit. no way am i going to spend all the money on the jcw kit, that was my only worry Tom Good lad ;-) I was looking at the 16% M7 Pulley, simply due to its bigger protection it has over the Alta for preventing the pulley slipping. However the Alta Pulley version 2.0 desposes of that as it to has the same protection

Mar 12th, 2007, 10:17 PM	#20 (permalink)
Tommy R MINI2 Regular My Classifieds Join Date: Dec 2006 Local Time: 02:53 AM Posts: 60 Offline	is the alta pulley the one used in the lcs1 kit?

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