Sorry to tell you, but they are different, if you have an email address I can send you the pictures of both, I wish I knew how to post them, I have an 04 and 05 SC and Ive installed about 15 JCW kits and I will tell you the JCW and the new 05 have a different coating on the rotors than the 02 thru 04.
Also take a look at the 05 MINI model update brochure under then heading, basic rundown on whats changing for 05, powertrain,
*Revised trans with shorter gear ratios
*New supercharger
*New automatic with steptronic paddles. (Have not seen one yet).

 

Awaiting your reply to Wallis re: 04 vs 05 Supercharger. Who is on target?

 

Where did you get 21% pulley? I want one!

 

The pulley came from Helix, I bought it about a year ago, Erics web site is not coming up and I have not talked to him for quite some time.

 

PM sent - I look forward to seeing the pictures. You're saying there's only two coatings - '02-'04 base, and '05 base & JCW? That would vary from others' experience of the two coatings being '02-'03 and then '04+ & JCW. I hope your pictures include the build dates and part numbers to confirm this slight disparity.

You've installed 15 JCW kits? Are you a Tech at a Dealership?

 

You've installed 15 JCW kits? Are you a Tech at a Dealership?[/QUOTE]
I am the lead tech and team leader for Ferman MINI and Wallis Motor Sport is my race team and perforemance shop. I am selling off all my invertory and parts to pay for the repairs to my home and shop after the hurricanes nailed us. My race team and web site are grounded for now, but I am still doing installs for some customers and racers when I can, I also field a team of racing go Karts wich keeps me quite busy and I'm a driving instructor for several local race clubs.
I do not pretend to know it all and would like to hear more from others about the SC. All I can tell you is that all the JCW SC from the very begining had a diferent coating than all the stock MCS's Ive ever seen until the 05 model year, I believe the production date change was 07/04. After that the coating on the factory SC is the same as the JCW.
JCW claims that the coating used in thier SC creates more boost and less heat, and MINI claims more boost from the NEW SC used in 05 model year acounts for the gain in power.
I look fwd to hearing more about this, all input is welcome, I will send you those pics and feel free to post them if you wish.

 

Hey guys, could you start a new thread on this in the Performance Mods: Drivetrain forum? I have some questions on the various superchargers but don't want to clog up this For Sale post with them.

 

Hey --- I'll swap you even for an 02 of mine. It only has 120k on it.

Hey BTW Xanthus said I could have that lower grill (just the mesh). Yea the one that been sitting over your cabinet at work. I'll call you later next week about it.

 

[QUOTE=KevinR]Hey guys, could you start a new thread on this in the Performance Mods: Drivetrain forum? I have some questions on the various superchargers but don't want to clog up this For Sale post with them.[/QUOTE

I agree, can the technical posts be transfered and leave the sale post here ?

 

The original for sale thread remains in marketplace. As requested by the thread starter this thread was split off and moved over to Performance Mods.

 

wallismotorsport,

Would you mind checking the rotor clearance with a feeler gauge? I'd like to know the difference if any, between old stock, new stock, and JCW.

 

My questions, to the group at large:

1) Does anyone know exactly when the superchargers with the improved coatings made it into the non-JCW cars? I've read 2005 and I've read mid-2004. I assume my 11/03 build '04 MCS doesn't have it, but it would be nice to know for sure.

2) Is there any real benefit to switching to this supercharger over the earlier version?

3) Would MINI sell the JCW supercharger (with the improved coating and the smaller pulley) over the parts counter to someone who hasn't bought the JCW kit?

4) Anyone know the price of a new supercharger over the MINI parts counter?

 

OK, after much research involing the parts pro's at our dealer here is what Ive found out.
As I stated before, as of july of 2004/ 05 production start, the new supercharger started bieng used, part #11 65 7 526 675. cost $2045.75
This new SC uses the same coating on the rotors found in the JCW SC.

The old SC has different rotors, part#11 65 1 476 790, and are not available new anymore, only reman, cost $1485.95.

The new SC is said to produce less heat and more boost and is the reason the 05's gained HP. There has been much talk about other factors in the HP gain like programing, this is not the case, we are using the same program to update all the MINIs as per campaign SIM 12-01-04 recall 04E-A01.

So in closing I would say the NEW 05 SC does increase output !!

 

OK, so the JCW/'05 SC appears to give more boost than the old one. Also, the JCW pulley is not quite as small as a 15% reduction pulley. Given all this, I would think that changing the JCW SC pulley to a 15% or maybe even a 17% pulley would really give a significant increase in boost and HP.

Any thoughts on this?

 

From a practical every day driving perspective, the JCW pulley is a 15%...which according to some is enough. Lets not go there, that's a dead horse.

 

Meb, I appreciate your point of view, but is it really enough? I keep reading that the JCW runs rich, so wouldn't going to perhaps a 17% pulley (or maybe even a 19% pulley) take advantage of that extra gas, while still avoiding a lean condition (and detonation)?

 

Always thought with 19% pulley you need bigger injectors like 400cc.

 

This brings up a second interesting issue (maybe deserving of another thread, I don't know...). I know my car runs rich because the tailpipes are black within a few days of washing. I've read that bigger injectors are not needed unless you go to a 19% pulley. But the JCW kit includes bigger injectors and its pulley is slightly less than 15%.

So when does it help to go to bigger injectors? When is it an absolute necessity?

 

My '03 MCS, runs rich and has black tailpipes within a day after washing. My '05 JCW with uprated injectors doesn't have black tailpipes even after a week of not washing the car.

 

IMHO, the "need" for bigger injectors is due to fueling limitations when running WOT, close to redline. Black tips from daily driving can occur with big injectors, small injectors, etc. It's strictly based on how the ECU is tuned and your driving habits.

 

Thanks Wallis for finding those part numbers. Also, thanks for letting us in that the ECU software is identical for all years. That would certainly implicate the only two known changes to have a HP impact [the cat-back and the new s/c rotor coating]. Or, a new rating for the fun of it, perhaps closer to what the earlier years were power-wise anyway? I wouldn't put it past a political move.

That said, I'll get the feeler gauge out and measure the '03 blower on my bench and compare to the '04 blower in my car next time it gets taken out. Like Andy implied, knowing the rotor clearance "Q" would help deduce more potential boost.

...and speaking of boost [off topic] - changing the s/c pulley isn't going to lean-out the car, the 2nd MAP sensor will see higher boost and adjust fuel according to its tables.

Cheers,
Ryan

 

So, if I'm reading this correctly, the only way to make the car stop running rich is to reprogram the ECU? Also, the JCW kit uses the larger injectors because it (theoretically) reprograms the ECU to take advantage of them?

Anywhere close to correct?:smile:

 

Since the ECU regulates airflow and fuel delivery, yes, you need to reprogram the ECU to change the mixture.

 

In reality, I know very little about this car. I have never owned a pressurized auto and some of the tuning techniques are different. I have only read that the JCW kit runs rich, even soggy, in the mid-range. I cannot say if this is a bad thing when looking at the JCW kit as a whole; if the ECU cannot fine adjust the injectors, the compromise might be a soggy midrange and a more perfect WOT fuel delivery. When all is said and done, I will probably not have too many JCW parts in the car. The IC, header, exhaust, pulley, and, the head need a bit more review. The 19% pulley has been said to produce power by some and essentially very little if any by others - refer to the Ideal Gas Law. I personally cannot comment about the later, although scientific theory and practical application have not always agreed in the past under every condition. If the 19% does not yield more power - due to greater pressure and therefore heat, it will not, to my way of thinking, lean-out midrange because the net affect - air density - has not been changed. I honestly don't know, and I need to see the results first hand. Soon...