K Series Lightweight Crank Pulleys

[DeanB]

Eliseparts reckon their crank pulleys save 2.25 kilos over the standard item, which is a lot. I have read something on seloc however about it causing problems with the crank, probably because it introduces different loadings.

 

What say the sensible folks on MLOC?

 

Thank you.

 

Dean

[Martin R]

I would not take the chance personally. Just machine the air con pulley off a standard one. It changes the frequency of the crank damping with a different pullley. It may or may not lead to the crank breaking?

 

I have never had a problem using a standard one with the extra pulley machined off. If you look at a standard one the inner and outer is separated by a bonded rubber ring. The outer chasing the inner during roation damps the crank AFAIK.

[Phil S1]

I had a friend turn my air con pulley off, as per Martin's suggestion...

 

 

 

Full thread info here:-

http://www.midlandslotus.co.uk/forum/topic/59300-hgf-diy-kr1/page-3

 

 

[@ndy]

As both Martin and Phil have said, Machine the standard pulley, don't risk the alloy lightweight ones, they don't have the in-built damper so I think this is asking for trouble.

[DeanB]

This sounds like good advice thanks chaps. Any idea how much weight is saved by machining off the redundant end pulley? Do you think it will make a noticeable difference to throttle response?

[@ndy]

This sounds like good advice thanks chaps. Any idea how much weight is saved by machining off the redundant end pulley? Do you think it will make a noticeable difference to throttle response?

 

I doubt it's saves much more than 400-500g if that and I would be surprised if you would notice an advantage if that was your only mod.

[AlanS1]

I found that this modification allowed you better access to the crank pulley nut and not really much else.