MINI2

05MCSConvertible · Jul 28th, 2005, 02:34 PM

I want to change pulleys on the 05 MCS and have heard that once you put a pulley on it is very hard to return stock. I would much rather convert the car back to stock when I sell it due to dimished value. If I put in a 3% Oversized crank pulley from ALTA would I still get a big boost increase similar to using a 15% pulley. Also crank pulleys can easily be replaced with stock, correct?

MINIAC · Jul 28th, 2005, 02:50 PM

Quote: Originally Posted by 05MCSConvertible

If I put in a 3% Oversized crank pulley from ALTA would I still get a big boost increase similar to using a 15% pulley.

NO ... it would be equivalent to having a 3% reduction pulley on the supercharger.

Mike Edwards · Jul 28th, 2005, 05:42 PM

Surely the effect is more than that?

The crank pulley looks to be a different size to the charger pulley - so you should be looking at the change in ratio?

MINIAC · Jul 28th, 2005, 06:53 PM

From the GT Tuning website:

Quote:

The larger diameter version gives the equivalent 'gearing change' to the supercharger of 'minus 3%' .

willymcd · Jul 28th, 2005, 07:54 PM

is it 3% reduction in circumference, diameter, or radius???

MINIAC · Jul 28th, 2005, 07:59 PM

diameter

Jul 28th, 2005, 02:34 PM	#1
05MCSConvertible MINI2 Regular Join Date: Jul 2005 Local Time: 10:41 PM Posts: 85 Offline	What would a 3% oversized (lightweight)oversized crank pulley do for factory boost? I want to change pulleys on the 05 MCS and have heard that once you put a pulley on it is very hard to return stock. I would much rather convert the car back to stock when I sell it due to dimished value. If I put in a 3% Oversized crank pulley from ALTA would I still get a big boost increase similar to using a 15% pulley. Also crank pulleys can easily be replaced with stock, correct?

Jul 28th, 2005, 07:59 PM	#6 (permalink)
MINIAC MINI Profiler Join Date: Feb 2001 Location: City By The Bay Local Time: 03:41 PM Posts: 8,467 Online	Door Number 2 ... diameter

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Jul 28th, 2005, 02:50 PM	#2 (permalink)
MINIAC MINI Profiler Join Date: Feb 2001 Location: City By The Bay Local Time: 03:41 PM Posts: 8,467 Online	Quote: Originally Posted by 05MCSConvertible If I put in a 3% Oversized crank pulley from ALTA would I still get a big boost increase similar to using a 15% pulley. NO ... it would be equivalent to having a 3% reduction pulley on the supercharger.

Jul 28th, 2005, 05:42 PM	#3 (permalink)
Mike Edwards MINI2 Master My Classifieds Join Date: Nov 2004 Location: Herefordshire Local Time: 11:41 PM Posts: 796 Offline	Surely the effect is more than that? The crank pulley looks to be a different size to the charger pulley - so you should be looking at the change in ratio?

Jul 28th, 2005, 06:53 PM	#4 (permalink)
MINIAC MINI Profiler Join Date: Feb 2001 Location: City By The Bay Local Time: 03:41 PM Posts: 8,467 Online	From the GT Tuning website: Quote: The larger diameter version gives the equivalent 'gearing change' to the supercharger of 'minus 3%' .

Jul 28th, 2005, 07:54 PM	#5 (permalink)
willymcd metal lord Join Date: May 2005 Location: portland, SLC, Aspen Local Time: 02:41 PM Posts: 111 Offline	is it 3% reduction in circumference, diameter, or radius???

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