MINI2

slider · Feb 14th, 2008, 08:45 PM

Can someone confirm that i'm understanding this correctly. I currently have a stock 210 cooper s which as part of the JCW mod has a 11% reduction on the supercharger. I'm going to fit a lightend crank pulley & i was thinking of the GTT one that is +4%. This will give me a total of 15% increase on the supercharger running speed which as i understand it is the max recommended increase unless i fit a larger intercooler to reduce the inlet temp..

uncle albert · Feb 14th, 2008, 10:10 PM

I thought biggest one GTT does is +3%? Might be wrong though.

MINI-Morgan · Feb 15th, 2008, 12:27 PM

Worth double checking if its +4% on the crank or equal to +4% on the SC pulley. Makes quite some difference!

The GTT website doesnt list the sizes other than +4MM on the crank from what I remember.

Richard Crofts · Feb 15th, 2008, 01:03 PM

4% is probably a little high. I believe GTT crank biggest off the shelf size is 3% increase over stock. On a JCW/GP this is OK, but I'd suggest a change of intercooler as my car on a 15% used to get red hot. The GP IC is pretty reasonable, theres GP with + cranks running with GP IC and they eem pretty good for power.

Babes · Feb 19th, 2008, 03:14 AM

I have been considering putting my 3% CP back on, though I have changed SC pulley to 17% now on my JCW. I have the GTT intercooler. Has anyone got this combo? I know some folks on here run 19% and even 21% SC pulleys. Is the 17% and 3% too much over the top?

sam_a156 · Feb 19th, 2008, 04:35 AM

I seem to remember that somebody was running a -15% SC and +3% GTT CP on his JCW...

And to my knowledge +3% CP is the biggest one from GTT.

ScottyBoy · Feb 19th, 2008, 07:53 AM

Im running a 15% S/C & +2% Alta Crank Pulley, and yes your understanding is correct!

Although has anyone got a confirmed size of the JCW Pulley?

Snowie · Feb 19th, 2008, 07:58 AM

Quote: Originally Posted by ScottyBoy (original)

Im running a 15% S/C & +2% Alta Crank Pulley, and yes your understanding is correct!

Although has anyone got a confirmed size of the JCW Pulley?

JCW is - 12% as measured on my GP by Roland

sam_a156 · Feb 19th, 2008, 08:49 AM

10.9161793% !

MINI COOPER :: North American Motoring - JCW Pulley Size??

Snowie · Feb 19th, 2008, 08:52 AM

Quote: Originally Posted by Snowie (original)

JCW is - 12% as measured on my GP by Roland

This is also confirmed by Tony Franks - ex JCW engineer who designed the JCW kits so it must be right

sam_a156 · Feb 19th, 2008, 09:14 AM

Ok, your references carry some weight!

But hey, that's good news, it is approximately 1,0838207 % better than I had assumed

Ant FR · Feb 19th, 2008, 09:45 AM

anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed.

Snowie · Feb 19th, 2008, 09:48 AM

Quote: Originally Posted by Ant FR (original)

anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed.

Not noticed any less engine braking effect

can not hear any increased whirring sound - probably killed by my exhaust as I also can not now hear the SC whine increasing

ScottyBoy · Feb 19th, 2008, 10:33 AM

Quote: Originally Posted by Ant FR (original)

anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed.

Yes i get that, i did ask about it a while back. When i read up on pullies when i first got one fitted, it was known as the "running tap sound" mine sounds as if there is a running water tap near the glove box area when held on part throttle.

Ant FR · Feb 19th, 2008, 10:42 AM

mines more as if there is an air leak from somewhere ( which there is'nt) and is very noticable. I think i'll get Roland to have another listen on Saturday when i go for oil change and general check over, ( will be hitting the big 1000 miles on saturday. run -in in a fortnight.!!

sam_a156 · Feb 19th, 2008, 11:19 AM

Quote: Originally Posted by Ant FR (original)

anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed.

I got a whirring noise right after the CP install, but it is only there when the A/C is on (??). It was very noticeable and I even contacted Roland about it.

roland2003 · Feb 19th, 2008, 12:04 PM

Ive never heard a whirring sound after fitting a crank pulley. There are no bearings in it ,it rotates 'as a whole' with the crank. More likely aircon or alternator or sc .

ScottyBoy · Feb 19th, 2008, 12:34 PM

Quote: Originally Posted by roland2003 (original)

Ive never heard a whirring sound after fitting a crank pulley. There are no bearings in it ,it rotates 'as a whole' with the crank. More likely aircon or alternator or sc .

IIRC i got told it was something spinning faster and forcing the water through the car alot quiker or maybe the aircon?

MINI-Morgan · Feb 19th, 2008, 01:48 PM

Quote: Originally Posted by ScottyBoy (original)

Yes i get that, i did ask about it a while back. When i read up on pullies when i first got one fitted, it was known as the "running tap sound" mine sounds as if there is a running water tap near the glove box area when held on part throttle.

Hey I get that too! lol figured it was just the drawing of air through the partly open throttle body.

I still have it after the removal of the lightened crank so cant be that

Have to say my MINI is quite different with the heavy stock crank back on....

Richard Crofts · Feb 19th, 2008, 02:10 PM

Its is the drawing of air. If you fit an air intake it turns from a triccling/running water noise to a sort of whitle on part throttle....esp if the scuttle panel is removed!

Feb 14th, 2008, 08:45 PM	#1
slider MINI2 Regular My Classifieds Join Date: Aug 2006 Local Time: 09:03 PM Posts: 134 Online	crank pulley Can someone confirm that i'm understanding this correctly. I currently have a stock 210 cooper s which as part of the JCW mod has a 11% reduction on the supercharger. I'm going to fit a lightend crank pulley & i was thinking of the GTT one that is +4%. This will give me a total of 15% increase on the supercharger running speed which as i understand it is the max recommended increase unless i fit a larger intercooler to reduce the inlet temp..

Feb 15th, 2008, 12:27 PM	#3 (permalink)
MINI-Morgan MINI Obsessed... My Classifieds Join Date: Nov 2003 Location: Southampton, Hants Local Time: 09:03 PM Posts: 4,679 Offline	Worth double checking if its +4% on the crank or equal to +4% on the SC pulley. Makes quite some difference! The GTT website doesnt list the sizes other than +4MM on the crank from what I remember. One Man, One Project......find out what happens next at MINIProject.co.uk For MINIs in the south it can only be South Coast New MINI Club

Feb 19th, 2008, 03:14 AM	#5 (permalink)
Babes Cruising In The Minge My Classifieds Join Date: Sep 2004 Location: Perth Local Time: 06:03 AM Posts: 740 Offline	I have been considering putting my 3% CP back on, though I have changed SC pulley to 17% now on my JCW. I have the GTT intercooler. Has anyone got this combo? I know some folks on here run 19% and even 21% SC pulleys. Is the 17% and 3% too much over the top? 2003 BRG/W JCW MCS 2002 PS/PS JCW MC 1970 BRG/W MK2 Morris Cooper S

Feb 19th, 2008, 07:58 AM	#8 (permalink)
Snowie MINI2 Master Join Date: Aug 2006 Location: Modena IT /Camberley Local Time: 10:03 PM Posts: 1,722 Offline	Quote: Originally Posted by ScottyBoy (original) Im running a 15% S/C & +2% Alta Crank Pulley, and yes your understanding is correct! Although has anyone got a confirmed size of the JCW Pulley? JCW is - 12% as measured on my GP by Roland In Italy

Feb 19th, 2008, 08:52 AM	#10 (permalink)
Snowie MINI2 Master Join Date: Aug 2006 Location: Modena IT /Camberley Local Time: 10:03 PM Posts: 1,722 Offline	Quote: Originally Posted by Snowie (original) JCW is - 12% as measured on my GP by Roland This is also confirmed by Tony Franks - ex JCW engineer who designed the JCW kits so it must be right In Italy

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Feb 14th, 2008, 10:10 PM	#2 (permalink)
uncle albert MINI2 Master Join Date: Apr 2005 Location: Hereford/Cwmbran Local Time: 09:03 PM Posts: 797 Offline	I thought biggest one GTT does is +3%? Might be wrong though.

Feb 15th, 2008, 01:03 PM	#4 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 09:03 PM Posts: 3,261 Offline	4% is probably a little high. I believe GTT crank biggest off the shelf size is 3% increase over stock. On a JCW/GP this is OK, but I'd suggest a change of intercooler as my car on a 15% used to get red hot. The GP IC is pretty reasonable, theres GP with + cranks running with GP IC and they eem pretty good for power.

Feb 19th, 2008, 04:35 AM	#6 (permalink)
sam_a156 Flying Finn My Classifieds Join Date: Oct 2006 Location: Warsaw Local Time: 10:03 PM Posts: 371 Offline	I seem to remember that somebody was running a -15% SC and +3% GTT CP on his JCW... And to my knowledge +3% CP is the biggest one from GTT.

Feb 19th, 2008, 07:53 AM	#7 (permalink)
ScottyBoy Obsessive Car Cleaner OCC My Classifieds Join Date: Jul 2006 Location: Thornaby NE Local Time: 09:03 PM Posts: 2,950 Online	Im running a 15% S/C & +2% Alta Crank Pulley, and yes your understanding is correct! Although has anyone got a confirmed size of the JCW Pulley?

Feb 19th, 2008, 08:49 AM	#9 (permalink)
sam_a156 Flying Finn My Classifieds Join Date: Oct 2006 Location: Warsaw Local Time: 10:03 PM Posts: 371 Offline	10.9161793% ! MINI COOPER :: North American Motoring - JCW Pulley Size??

Feb 19th, 2008, 09:14 AM	#11 (permalink)
sam_a156 Flying Finn My Classifieds Join Date: Oct 2006 Location: Warsaw Local Time: 10:03 PM Posts: 371 Offline	Ok, your references carry some weight! But hey, that's good news, it is approximately 1,0838207 % better than I had assumed

Feb 19th, 2008, 09:45 AM	#12 (permalink)
Ant FR MINI2 Master My Classifieds Join Date: Oct 2006 Local Time: 09:03 PM Posts: 1,922 Offline	anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed.

Feb 19th, 2008, 09:48 AM	#13 (permalink)
Snowie MINI2 Master Join Date: Aug 2006 Location: Modena IT /Camberley Local Time: 10:03 PM Posts: 1,722 Offline	Quote: Originally Posted by Ant FR (original) anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed. Not noticed any less engine braking effect can not hear any increased whirring sound - probably killed by my exhaust as I also can not now hear the SC whine increasing In Italy

Feb 19th, 2008, 10:33 AM	#14 (permalink)
ScottyBoy Obsessive Car Cleaner OCC My Classifieds Join Date: Jul 2006 Location: Thornaby NE Local Time: 09:03 PM Posts: 2,950 Online	Quote: Originally Posted by Ant FR (original) anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed. Yes i get that, i did ask about it a while back. When i read up on pullies when i first got one fitted, it was known as the "running tap sound" mine sounds as if there is a running water tap near the glove box area when held on part throttle.

Feb 19th, 2008, 10:42 AM	#15 (permalink)
Ant FR MINI2 Master My Classifieds Join Date: Oct 2006 Local Time: 09:03 PM Posts: 1,922 Offline	mines more as if there is an air leak from somewhere ( which there is'nt) and is very noticable. I think i'll get Roland to have another listen on Saturday when i go for oil change and general check over, ( will be hitting the big 1000 miles on saturday. run -in in a fortnight.!!

Feb 19th, 2008, 11:19 AM	#16 (permalink)
sam_a156 Flying Finn My Classifieds Join Date: Oct 2006 Location: Warsaw Local Time: 10:03 PM Posts: 371 Offline	Quote: Originally Posted by Ant FR (original) anyone notice a lot less engine braking using the reduced weight crank pulley. Also do you also get a whirring noise that increases with speed. I got a whirring noise right after the CP install, but it is only there when the A/C is on (??). It was very noticeable and I even contacted Roland about it.

Feb 19th, 2008, 12:04 PM	#17 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 09:03 PM Posts: 2,731 Offline	Ive never heard a whirring sound after fitting a crank pulley. There are no bearings in it ,it rotates 'as a whole' with the crank. More likely aircon or alternator or sc . www.gttuning.com

Feb 19th, 2008, 12:34 PM	#18 (permalink)
ScottyBoy Obsessive Car Cleaner OCC My Classifieds Join Date: Jul 2006 Location: Thornaby NE Local Time: 09:03 PM Posts: 2,950 Online	Quote: Originally Posted by roland2003 (original) Ive never heard a whirring sound after fitting a crank pulley. There are no bearings in it ,it rotates 'as a whole' with the crank. More likely aircon or alternator or sc . IIRC i got told it was something spinning faster and forcing the water through the car alot quiker or maybe the aircon?

Feb 19th, 2008, 01:48 PM	#19 (permalink)
MINI-Morgan MINI Obsessed... My Classifieds Join Date: Nov 2003 Location: Southampton, Hants Local Time: 09:03 PM Posts: 4,679 Offline	Quote: Originally Posted by ScottyBoy (original) Yes i get that, i did ask about it a while back. When i read up on pullies when i first got one fitted, it was known as the "running tap sound" mine sounds as if there is a running water tap near the glove box area when held on part throttle. Hey I get that too! lol figured it was just the drawing of air through the partly open throttle body. I still have it after the removal of the lightened crank so cant be that Have to say my MINI is quite different with the heavy stock crank back on.... One Man, One Project......find out what happens next at MINIProject.co.uk For MINIs in the south it can only be South Coast New MINI Club

Feb 19th, 2008, 02:10 PM	#20 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 09:03 PM Posts: 3,261 Offline	Its is the drawing of air. If you fit an air intake it turns from a triccling/running water noise to a sort of whitle on part throttle....esp if the scuttle panel is removed!

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