MINI2

KiwiJCW · Oct 16th, 2006, 04:31 AM

Guys

Any experience or thoughts re. the long-term effects of having a lightweight crank pulley?

I would have thought that the OEM pulley mass would act as a dampener to smooth out crank harmonics, and am worried about the long-term impact on the crank if I instal a lwt pulley for performance reasons.

Am I worrying about nothing?

cheers

Shorty · Oct 16th, 2006, 05:42 AM

Anyone with any views on this?

I'm also tempted by a lightweight crank pulley...

Babes · Oct 16th, 2006, 07:13 AM

I spent about 2 months trying to research this exact thing. Already had the 3% lightweight crank pulley from GT Tuning but after hearing a few negative stories held off on fitting it. From what I have read it seems incorrect fitment is the major reason for having dramas.

I asked my BMW service dude what the long term effects would be and he said in 2/300,000 kms may need new bearings. Have had mine fitted for about 3000kms now and it has completely transformed the car.

No doubt there will be a lot of folk saying dont do it, as there is no real long term data on what the effects are. Roland from GTT has 20,000+ miles on his crank pulley now without problem and his seems to be the longest tested one to date.

Some lightweight crank pulleys seem to be worse than others but I have only read good things about the GTT one. If you look on NAM there is a bit more info on them.

Tonyt3 · Oct 16th, 2006, 09:09 AM

I had the GTT one fitted and it gave no issues over the period that I owned the car with it on (one year, 24000 miles). Made the car a joy.

duncanbanana · Oct 16th, 2006, 10:50 AM

I have the Alta 3% larger lightened crank pulley on my Mini for over 10000 miles , no problems at all

Blusox · Oct 16th, 2006, 12:11 PM

Ho easy are these things to fit on your own?

duncanbanana · Oct 16th, 2006, 12:23 PM

According to Randy Webbs website not as hard as replacing the supercharger pulley

KiwiJCW · Oct 16th, 2006, 07:20 PM

Quote: Originally Posted by Babes (original)

I asked my BMW service dude what the long term effects would be and he said in 2/300,000 kms may need new bearings. Have had mine fitted for about 3000kms now and it has completely transformed the car.

Quote: Originally Posted by Tonyt3 (original)

I had the GTT one fitted and it gave no issues over the period that I owned the car with it on (one year, 24000 miles). Made the car a joy.

Thanks, pretty reassuring.

Was thinking about this last night...I guess the flywheel will still be acting as a dampener.

roland2003 · Oct 17th, 2006, 08:12 AM

-Good point. KIWI Jcw.
BTW our demo ar also has a rigid lightweight alloy flywheel ASWELL as the GTT Lightweight Crank Pulley. -In essence our demo car becomes an even MORE demanding long term test on the engine/crank
Best Regards Roland GT Tuning.

Oct 16th, 2006, 04:31 AM	#1
KiwiJCW MINI2 Regular Join Date: Jan 2006 Location: New Zealand Local Time: 11:20 AM Posts: 57 Offline	Lightweight crank pulleys & impact on reliability Guys Any experience or thoughts re. the long-term effects of having a lightweight crank pulley? I would have thought that the OEM pulley mass would act as a dampener to smooth out crank harmonics, and am worried about the long-term impact on the crank if I instal a lwt pulley for performance reasons. Am I worrying about nothing? cheers

Oct 16th, 2006, 07:13 AM	#3 (permalink)
Babes Cruising In The Minge My Classifieds Join Date: Sep 2004 Location: Perth Local Time: 06:20 AM Posts: 747 Offline	I spent about 2 months trying to research this exact thing. Already had the 3% lightweight crank pulley from GT Tuning but after hearing a few negative stories held off on fitting it. From what I have read it seems incorrect fitment is the major reason for having dramas. I asked my BMW service dude what the long term effects would be and he said in 2/300,000 kms may need new bearings. Have had mine fitted for about 3000kms now and it has completely transformed the car. No doubt there will be a lot of folk saying dont do it, as there is no real long term data on what the effects are. Roland from GTT has 20,000+ miles on his crank pulley now without problem and his seems to be the longest tested one to date. Some lightweight crank pulleys seem to be worse than others but I have only read good things about the GTT one. If you look on NAM there is a bit more info on them. 2003 BRG/W JCW MCS 2002 PS/PS JCW MC 1970 BRG/W MK2 Morris Cooper S

Oct 17th, 2006, 08:12 AM	#9 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 11:20 PM Posts: 2,736 Offline	-Good point. KIWI Jcw. BTW our demo ar also has a rigid lightweight alloy flywheel ASWELL as the GTT Lightweight Crank Pulley. -In essence our demo car becomes an even MORE demanding long term test on the engine/crank Best Regards Roland GT Tuning. www.gttuning.com

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Oct 16th, 2006, 05:42 AM	#2 (permalink)
Shorty MINI2 Master Join Date: Jul 2003 Location: Great Malvern Local Time: 11:20 PM Posts: 1,357 Offline	Anyone with any views on this? I'm also tempted by a lightweight crank pulley...

Oct 16th, 2006, 09:09 AM	#4 (permalink)
Tonyt3 Track addict Join Date: Jan 2003 Location: Hants Local Time: 11:20 PM Posts: 6,258 Offline	I had the GTT one fitted and it gave no issues over the period that I owned the car with it on (one year, 24000 miles). Made the car a joy.

Oct 16th, 2006, 10:50 AM	#5 (permalink)
duncanbanana Yeah...I know !!! Join Date: Jun 2003 Location: North West Local Time: 11:20 PM Posts: 1,231 Offline	I have the Alta 3% larger lightened crank pulley on my Mini for over 10000 miles , no problems at all

Oct 16th, 2006, 12:11 PM	#6 (permalink)
Blusox MINI2 Regular My Classifieds Join Date: May 2002 Location: South East Local Time: 11:20 PM Posts: 279 Offline	Ho easy are these things to fit on your own?

Oct 16th, 2006, 12:23 PM	#7 (permalink)
duncanbanana Yeah...I know !!! Join Date: Jun 2003 Location: North West Local Time: 11:20 PM Posts: 1,231 Offline	According to Randy Webbs website not as hard as replacing the supercharger pulley

Oct 16th, 2006, 07:20 PM	#8 (permalink)
KiwiJCW MINI2 Regular Join Date: Jan 2006 Location: New Zealand Local Time: 11:20 AM Posts: 57 Offline	Quote: Originally Posted by Babes (original) I asked my BMW service dude what the long term effects would be and he said in 2/300,000 kms may need new bearings. Have had mine fitted for about 3000kms now and it has completely transformed the car. Quote: Originally Posted by Tonyt3 (original) I had the GTT one fitted and it gave no issues over the period that I owned the car with it on (one year, 24000 miles). Made the car a joy. Thanks, pretty reassuring. Was thinking about this last night...I guess the flywheel will still be acting as a dampener.

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