MINI2

Cheech · Mar 20th, 2007, 09:17 PM

I need to replace the drive belt on my 03 JCW. I know the JCW belt is 14mm shorter than the standard mcs belt and I have a new belt thats used for 15% pulley conversions.

As some people say the jcw pulley is less than 14% will this belt still be ok or should i go for the oem jcw belt?

Cheers

brainycheddar · Mar 21st, 2007, 05:19 AM

I think that the JCW is a 14.6% reduction, in any case, IMHO the belt tensioner should take care of any slop.

DaFlake · Mar 21st, 2007, 07:14 AM

I run stock size belt on a 15% pulley. You should be ok with stock as the pulley you have is 14.6% and as pointed out, the tensioner will take care of the play in the belt.

roland2003 · Mar 21st, 2007, 08:38 AM

Hi Guys,On the subject of belts for some reason

the latest batch of stock belts from BMW (which shoulb be 1388mm) are about 5mm longer than normal, I reckon a 15% pulley with one ot these and the the tensioner will only be about 1mm of the stop

I like to see 12-20mm of available travel when first fitted. You'll never get that using a stock belt with -15% pulley.
Best Regards Roland GTT

DaFlake · Mar 21st, 2007, 08:43 AM

Very interesting Roland, I wonder if that was a mistake or what.

Cheech · Mar 21st, 2007, 09:24 AM

so Rolond would you fit your standard shorter belt, the one you'd fit with to a 15% pulley, on a JCW car? It's just i've seen you say the JCW pulley is around 12% and want to make sure it won't be a prob

Mar 20th, 2007, 09:17 PM	#1
Cheech Veyron with MINI bodykit Join Date: Feb 2007 Local Time: 07:12 AM Posts: 9 Offline	Which belt?? I need to replace the drive belt on my 03 JCW. I know the JCW belt is 14mm shorter than the standard mcs belt and I have a new belt thats used for 15% pulley conversions. As some people say the jcw pulley is less than 14% will this belt still be ok or should i go for the oem jcw belt? Cheers

Mar 21st, 2007, 05:19 AM	#2 (permalink)
brainycheddar a.k.a. BrainRush Join Date: Oct 2006 Location: NorCal Local Time: 12:12 AM Posts: 55 Offline	I think that the JCW is a 14.6% reduction, in any case, IMHO the belt tensioner should take care of any slop. Mods:

Mar 21st, 2007, 07:14 AM	#3 (permalink)
DaFlake I miss my MINI Join Date: Oct 2005 Location: Hanging on The Cape! Local Time: 03:12 AM Posts: 10,652 Offline	I run stock size belt on a 15% pulley. You should be ok with stock as the pulley you have is 14.6% and as pointed out, the tensioner will take care of the play in the belt. Global Moderator

Mar 21st, 2007, 08:38 AM	#4 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 08:12 AM Posts: 2,736 Offline	Hi Guys,On the subject of belts for some reason the latest batch of stock belts from BMW (which shoulb be 1388mm) are about 5mm longer than normal, I reckon a 15% pulley with one ot these and the the tensioner will only be about 1mm of the stop I like to see 12-20mm of available travel when first fitted. You'll never get that using a stock belt with -15% pulley. Best Regards Roland GTT www.gttuning.com

Mar 21st, 2007, 08:43 AM	#5 (permalink)
DaFlake I miss my MINI Join Date: Oct 2005 Location: Hanging on The Cape! Local Time: 03:12 AM Posts: 10,652 Offline	Very interesting Roland, I wonder if that was a mistake or what. Global Moderator

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Mar 21st, 2007, 09:24 AM	#6 (permalink)
Cheech Veyron with MINI bodykit Join Date: Feb 2007 Local Time: 07:12 AM Posts: 9 Offline	so Rolond would you fit your standard shorter belt, the one you'd fit with to a 15% pulley, on a JCW car? It's just i've seen you say the JCW pulley is around 12% and want to make sure it won't be a prob

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