MINI2

KMK163 · May 5th, 2006, 06:52 AM

Hello guys, waht are the differences on these pulleys and which one do you prefer to use for having a bhp of around 200-210.

Thanks.

Tonyt3 · May 5th, 2006, 03:08 PM

Quote: Originally Posted by KMK163

Hello guys, waht are the differences on these pulleys and which one do you prefer to use for having a bhp of around 200-210.

Thanks.

Difference is circumferance, 200-210 a 15% is most suitable. The higher the percentage reduction, the more likely hood of problems.

JCW use around a 14.5% reduction.

venox22 · May 5th, 2006, 03:22 PM

The JCW pulley i measured last week, was 11.1% reduction, can anybody shed any light see below!!

http://www.mini2.com/forum/engine-dr...ly-11-a-4.html

Richard Crofts · May 5th, 2006, 03:30 PM

Most basic tuning kits on the S are 200-225 and they use a 15% pulley

JCW is on or around 15% also.

19% is way too far IMO and will lead to all sorts of issues and a car that runs very hot is my guess.

I know of cars running nearly 230-50bhp with a 15% pulley

Tonyt3 · May 5th, 2006, 03:32 PM

Quote: Originally Posted by venox22

The JCW pulley i measured last week, was 11.1% reduction, can anybody shed any light see below!!

http://www.mini2.com/forum/engine-dr...ly-11-a-4.html

This just does not make sense. Are you sure you have your measurements right, have you double checked the maths, have you checked the part number? No one make 11% pulleys as far as I'm aware. There must be an anomoly somewhere.

venox22 · May 5th, 2006, 03:35 PM

Check the thread link, Roland at GTT first one at 11% a while back!!!

Tonyt3 · May 5th, 2006, 03:38 PM

Quote: Originally Posted by venox22

Check the thread link, Roland at GTT first one at 11% a while back!!!

sorry, couldnt be bothered to read it all. Did you check the part number against the proper part number? as I say, must be an anomoly somewhere.

venox22 · May 5th, 2006, 03:42 PM

no there is no part number on the face of the pulley that you can see, do you have the part number's for the jcw pulley/sc

Tonyt3 · May 5th, 2006, 03:56 PM

Quote: Originally Posted by venox22

no there is no part number on the face of the pulley that you can see, do you have the part number's for the jcw pulley/sc

no, but seeing Roland tomorrow, willask him if he's taken any off recently....

venox22 · May 5th, 2006, 04:01 PM

ok cool, thinking of getting his Hybrid JCW box conv, have you had that done???

roland2003 · May 5th, 2006, 04:20 PM

Hi, yes although we get a lot of JCW cars in ,we dont get to measure many JCW pulleys. Reason being you can't 'get in' to measure it in situ. Also we don't remove many as most people do as Tony has, which is fit the GTT +3% Crank pulley. -Much more cost effective as is lighter too. Regards Roland GT Tuning

minti · May 8th, 2006, 12:49 PM

Supercharger-Pulley sizes (due to my limited knowledge):
Cooper S Standard: 65mm (belt 6PK 1388)
JCW & Kelleners (11%): 58,2mm (belt 6PK 1370 (or 6PK 1374 ?))
Digitec(DT) & RMS: 57mm
Hartge &
hitec inkl. MTH (13%): 56,5mm
Minimania (Ultrik): 55,6mm
Alta (15%): 55,6mm (belt 6PK 1365)
GTT 17%:
Schäfer: 54mm
Alta (19%): 54mm (belt 6PK 1352)

KMK163 · May 10th, 2006, 06:36 AM

Ok guys thanks. So a 15% is all i need. Another question do the different brands of pulleys have many differences? If i get an alta lets say or a gtt would it be a difference?

venox22 · Sep 25th, 2006, 09:32 AM

Works Pulley - 57.9mm = 11% reduction

Tonyt3 · Sep 25th, 2006, 10:01 AM

Quote: Originally Posted by venox22 (original)

Works Pulley - 57.9mm = 11% reduction
GP Pulley - 56.5mm = 13.6% reduction

Can I ask where you get this information from, as I dont beleive that the specs for the GP said there was any difference in Pulley size...?

T-bone S · Sep 27th, 2006, 09:05 PM

correct - there is no pulley/supercharger change on the GP - only larger IC with revised ECU map that also increases rev limit

herbie hind · Sep 27th, 2006, 11:36 PM

being that 17's and 19's have been known to slip and also break belts due some say to them having less surface area for traction has anyone made a bigger idler pulley to change the angle of attack on the s/c pulley giving it back some traction?

MINIAC · Sep 28th, 2006, 01:05 AM

Quote: Originally Posted by venox22 (original)

Works Pulley - 57.9mm = 11% reduction

Someone else has measured the Works pulley at 2.21" (56.1mm) ...

North American Motoring - View Single Post - Let's Dispel the Myths!

venox22 · Sep 28th, 2006, 08:10 AM

is that measuring the tips of the vee grooves or not??

Perm · Sep 28th, 2006, 11:00 AM

Quote: Originally Posted by herbie hind (original)

being that 17's and 19's have been known to slip and also break belts due some say to them having less surface area for traction has anyone made a bigger idler pulley to change the angle of attack on the s/c pulley giving it back some traction?

BBR use a cosworth idler with their 19% reduction pulley. This special idler is designed to allow for the std belt to be used.

Regards

Perm

May 5th, 2006, 06:52 AM	#1
KMK163 MINI2 Regular Join Date: Jan 2006 Local Time: 09:33 PM Posts: 233 Offline	15%-17%-19% pulleys!!! Hello guys, waht are the differences on these pulleys and which one do you prefer to use for having a bhp of around 200-210. Thanks.

May 5th, 2006, 04:20 PM	#11 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 09:33 PM Posts: 2,731 Offline	Hi, yes although we get a lot of JCW cars in ,we dont get to measure many JCW pulleys. Reason being you can't 'get in' to measure it in situ. Also we don't remove many as most people do as Tony has, which is fit the GTT +3% Crank pulley. -Much more cost effective as is lighter too. Regards Roland GT Tuning www.gttuning.com

May 8th, 2006, 12:49 PM	#12 (permalink)
minti MINI2 Newbie Join Date: Mar 2006 Local Time: 11:33 PM Posts: 28 Offline	Supercharger-Pulley sizes (due to my limited knowledge): Cooper S Standard: 65mm (belt 6PK 1388) JCW & Kelleners (11%): 58,2mm (belt 6PK 1370 (or 6PK 1374 ?)) Digitec(DT) & RMS: 57mm Hartge & hitec inkl. MTH (13%): 56,5mm Minimania (Ultrik): 55,6mm Alta (15%): 55,6mm (belt 6PK 1365) GTT 17%: Schäfer: 54mm Alta (19%): 54mm (belt 6PK 1352) MCS JCW MTH GTT Alta H&R Bilstein

Sep 25th, 2006, 09:32 AM	#14 (permalink)
venox22 only the brave! Join Date: Dec 2004 Location: Lincs Local Time: 10:33 PM Posts: 1,290 Offline	Works Pulley - 57.9mm = 11% reduction Last edited by venox22 : Sep 26th, 2006 at 01:06 PM. Reason: sorry misinformed!

Sep 27th, 2006, 09:05 PM	#16 (permalink)
T-bone S MINI2 Senior Join Date: May 2006 Location: Berkshire Local Time: 09:33 PM Posts: 524 Offline	correct - there is no pulley/supercharger change on the GP - only larger IC with revised ECU map that also increases rev limit MY05 MINI COOPER S - DS/B - GTT OPTIMISED- THANKS FOR THE RIDE - ENTER THE R56 JCW

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May 5th, 2006, 03:08 PM	#2 (permalink)
Tonyt3 Track addict Join Date: Jan 2003 Location: Hants Local Time: 09:33 PM Posts: 6,010 Offline	Quote: Originally Posted by KMK163 Hello guys, waht are the differences on these pulleys and which one do you prefer to use for having a bhp of around 200-210. Thanks. Difference is circumferance, 200-210 a 15% is most suitable. The higher the percentage reduction, the more likely hood of problems. JCW use around a 14.5% reduction.

May 5th, 2006, 03:22 PM	#3 (permalink)
venox22 only the brave! Join Date: Dec 2004 Location: Lincs Local Time: 10:33 PM Posts: 1,290 Offline	The JCW pulley i measured last week, was 11.1% reduction, can anybody shed any light see below!! http://www.mini2.com/forum/engine-dr...ly-11-a-4.html

May 5th, 2006, 03:30 PM	#4 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 09:33 PM Posts: 3,261 Offline	Most basic tuning kits on the S are 200-225 and they use a 15% pulley JCW is on or around 15% also. 19% is way too far IMO and will lead to all sorts of issues and a car that runs very hot is my guess. I know of cars running nearly 230-50bhp with a 15% pulley

May 5th, 2006, 03:32 PM	#5 (permalink)
Tonyt3 Track addict Join Date: Jan 2003 Location: Hants Local Time: 09:33 PM Posts: 6,010 Offline	Quote: Originally Posted by venox22 The JCW pulley i measured last week, was 11.1% reduction, can anybody shed any light see below!! http://www.mini2.com/forum/engine-dr...ly-11-a-4.html This just does not make sense. Are you sure you have your measurements right, have you double checked the maths, have you checked the part number? No one make 11% pulleys as far as I'm aware. There must be an anomoly somewhere.

May 5th, 2006, 03:35 PM	#6 (permalink)
venox22 only the brave! Join Date: Dec 2004 Location: Lincs Local Time: 10:33 PM Posts: 1,290 Offline	Check the thread link, Roland at GTT first one at 11% a while back!!!

May 5th, 2006, 03:38 PM	#7 (permalink)
Tonyt3 Track addict Join Date: Jan 2003 Location: Hants Local Time: 09:33 PM Posts: 6,010 Offline	Quote: Originally Posted by venox22 Check the thread link, Roland at GTT first one at 11% a while back!!! sorry, couldnt be bothered to read it all. Did you check the part number against the proper part number? as I say, must be an anomoly somewhere.

May 5th, 2006, 03:42 PM	#8 (permalink)
venox22 only the brave! Join Date: Dec 2004 Location: Lincs Local Time: 10:33 PM Posts: 1,290 Offline	no there is no part number on the face of the pulley that you can see, do you have the part number's for the jcw pulley/sc

May 5th, 2006, 03:56 PM	#9 (permalink)
Tonyt3 Track addict Join Date: Jan 2003 Location: Hants Local Time: 09:33 PM Posts: 6,010 Offline	Quote: Originally Posted by venox22 no there is no part number on the face of the pulley that you can see, do you have the part number's for the jcw pulley/sc no, but seeing Roland tomorrow, willask him if he's taken any off recently....

May 5th, 2006, 04:01 PM	#10 (permalink)
venox22 only the brave! Join Date: Dec 2004 Location: Lincs Local Time: 10:33 PM Posts: 1,290 Offline	ok cool, thinking of getting his Hybrid JCW box conv, have you had that done???

May 10th, 2006, 06:36 AM	#13 (permalink)
KMK163 MINI2 Regular Join Date: Jan 2006 Local Time: 09:33 PM Posts: 233 Offline	Ok guys thanks. So a 15% is all i need. Another question do the different brands of pulleys have many differences? If i get an alta lets say or a gtt would it be a difference?

Sep 25th, 2006, 10:01 AM	#15 (permalink)
Tonyt3 Track addict Join Date: Jan 2003 Location: Hants Local Time: 09:33 PM Posts: 6,010 Offline	Quote: Originally Posted by venox22 (original) Works Pulley - 57.9mm = 11% reduction GP Pulley - 56.5mm = 13.6% reduction Can I ask where you get this information from, as I dont beleive that the specs for the GP said there was any difference in Pulley size...?

Sep 27th, 2006, 11:36 PM	#17 (permalink)
herbie hind MINI2 Senior Join Date: Jun 2006 Location: providence subburbs Local Time: 05:33 PM Posts: 449 Offline	being that 17's and 19's have been known to slip and also break belts due some say to them having less surface area for traction has anyone made a bigger idler pulley to change the angle of attack on the s/c pulley giving it back some traction?

Sep 28th, 2006, 01:05 AM	#18 (permalink)
MINIAC MINI Profiler Join Date: Feb 2001 Location: City By The Bay Local Time: 01:33 PM Posts: 8,618 Online	Quote: Originally Posted by venox22 (original) Works Pulley - 57.9mm = 11% reduction Someone else has measured the Works pulley at 2.21" (56.1mm) ... North American Motoring - View Single Post - Let's Dispel the Myths!

Sep 28th, 2006, 08:10 AM	#19 (permalink)
venox22 only the brave! Join Date: Dec 2004 Location: Lincs Local Time: 10:33 PM Posts: 1,290 Offline	is that measuring the tips of the vee grooves or not??

Sep 28th, 2006, 11:00 AM	#20 (permalink)
Perm MINI2 Senior Join Date: Jul 2003 Location: Nottinghamshire Local Time: 09:33 PM Posts: 490 Offline	Quote: Originally Posted by herbie hind (original) being that 17's and 19's have been known to slip and also break belts due some say to them having less surface area for traction has anyone made a bigger idler pulley to change the angle of attack on the s/c pulley giving it back some traction? BBR use a cosworth idler with their 19% reduction pulley. This special idler is designed to allow for the std belt to be used. Regards Perm

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