CFS,
i guess if u had the $$ u would go to the one with damper... firstly u will save ur engine a bit becoz it has a damper, secondly, if its too light then u will lose a bit of low end torque, by looking at the methology pulleys i guess that the torque loss is neglectable in the lower range. try to see the dyno chart for the one without the damper and compare.



cheers

so which is better in terms of torque in the lower end, say below 4K?
and power in the high end, ard 6K?

thanks, i also have seen this b4, what i was referring to was if there was one to compare with the cranks pulley without the damper.

and also for a long time i have wondered, stock neo 0-100km/h is 8.4 sec???
stock gen2 manual is about 10sec so a car about 50kg lighter can do so much better?

yup. the pulley size is calculated by the manufacturer to give the best performance to reliability ratio as possible...

changing anything if not done properly is going to effect some thing or another...