[font=Arial][size=2]FYI,[/size][/font]
[font=Arial][/font]
[font=Arial]I wrote to John Cooper Works about their SC. This is their reply[/font]
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[font=Arial][size=2]Morning,[/size][/font]
[font=Arial][size=2][/size][/font]
[font=Arial][size=2]The super charger is not modified its a larger super charger and faster spinning charger its brand new.[/size][/font]
[font=Arial][size=2]We do not supply the super charger on its own it only comes as part of the conversion..[/size][/font]
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[font=Arial][size=2]Regards[/size][/font]

[font=Arial][size=2]Chris Dawson
Service Advisor
John Cooper Works
www.johncooper.co.uk[/size][/font]

 

If I'm reading this correctly, JCW say that their s/c is "larger"? We all knew it spins faster due to the pulley, but larger? Spider, any way to get JCW to clarify that comment?

 

larger? i like the sound of that! SpiderX i would also like s clarification of that comment!

 

according to the email, it is indeed larger.

 

I don't buy it. Dam Brits!

 

I thought the JCW SC was the same as used on the 05's now. It has the coating that give the SC closer tolerances which create more boost for a given rpm.

http://www.motoringfile.com/2004/04/29/details_on_the_new_2005_mcs_supercharger

 

more details.. sure sounds like the same one... I doubt JCW would want everyone to know.

http://www.motoringfile.com/2004/05/08/qampa_with_eaton_on_the_2005_mcs_supercharger

 

That email clearly states "larger". I'm with Onasled, "damn brits."

 

I don't know exactly, but if it's ported any, it would have more volume, and that might be why they say larger. Heck, just a guess...

 

I wonder if thats there quick non-technical way of saying its better. You know as in BIGGER is BETTER

 

That's rather non MINI-esque logic though .

 

For what its worth.....I'm getting the M7 SC mod. I think that will keep up or outdo anything that the JCW people have come up with based on dynos of complete JCW cars

 

While JCW may not sell single items, they have to supply them to Mini for repairs.... Classic Auto Campus quoted me just the head when I thought I needed a new one, and wanted to see what it would cost to upgrade. FYI, it's over $3k!

For what it's worth.

Matt

 

Notice that the in outmotoring link the guy from Eaton said it "continues to be different" not bigger. It is my understanding that the diff. between the production model and the JCW model is the water pump gearing and pulley. The different gearing compensates for the smaller pulley by slowing the water pump down.
Other than that, the vanes are coated (as they are in 05's), increasing tolerances and boost pressure.
Wth the number of people taking them off and apart for porting and polishing sombody must have come across a JCW SC and checked the internals. One of them will chime in here sooner or later.
Joey