Light Weight Pulley Kits

[MYWPN]

I'd agree they work on standard to mild applications. I'd agree with ninka with the torsional

vibration without the extra weight would be detrimental to the bottom end espicially the crankshaft if u could run light or no pulley why would car companies even put them on.

[P_BA_XR6]

I ment to say it made difference to my Na motor/ Na set up apologies but turbo have no idea I put it on because I transferred it from Na motor but I still stick to anything lighter will be an advantage personal thought not a mechanic, don't see how it would affect really the crank seeing people buy the lighten flywheel and clutch kit from malwood and the flywheel is about 1kg lighter than standard and people still pushing the 390 kw mark off the stock engine/crank. so you saying putting the lighten engine balancer on the front won't have same affect as the lightened flywheel. I put both on so it's matched weight off both sides as well as the fact I already had the lighten engine balancer and I needed stronger clutch, ( my thought) I see taking equal/or bloody close weight off both sides is ok seeing its matched it's then balanced again to standard setup just lighter, having less weight will give you quicker revs (more Throttle response, possibly torque gains from mid to high revs because of less combustion is made to turn the crank with the lighten flywheel and balancer) but you lose low Down torque,

If I was to buy pulley I would buy something what has passed in racing criteria they would have some time fluid in balancer I beleive to help get rid of any vibration by the fluid which would run to spot were its not balanced such as power bond pulley

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[Kroozin]

http://listverse.com/2007/10/12/top-10-rules-of-punctuation/

[shaunjennifer21]

dont all the kits come with the crank shaft pulley anyway ?

[P_BA_XR6]

What do you mean? mate

[Ninka]

  On 15/06/2012 at 6:03 AM, shaunjennifer21 said:

dont all the kits come with the crank shaft pulley anyway ?

The "Crankshaft Pulley" is the Harmonic Balancer, and a good one will cost you quite a few hundred $$ so in most cases I have seen, it is not part of a "Pulley Kit"

[tradey]

Well I have to sons on this With different opinions, who would have thought , both with valid points but the real answer is the lighter the rotating mass the quicker the motor will rev and as long as the parts are of equal strength the lighter motor mass will always be more reliable as there are less forces exerted on that mass

Go ahead flame away

[1600dave]

The harmonic balancer is there for a reason, I dare say removing it will not improve reliability. Performance gains on a 4l turbo motor probably wouldn't be noticeable.

[Ralph Wiggum]

  On 15/06/2012 at 10:38 AM, tradey said:

Well I have to sons on this With different opinions, who would have thought , both with valid points but the real answer is the lighter the rotating mass the quicker the motor will rev and as long as the parts are of equal strength the lighter motor mass will always be more reliable as there are less forces exerted on that mass

Go ahead flame away

The lighter mass damper wont be able to absorb as vibration as the standard damper either. Gain rev's loose ability to absorb harmonic imbalance.

[Ninka]

  On 15/06/2012 at 11:21 AM, Ralph Wiggum said:

The lighter mass damper wont be able to absorb as vibration as the standard damper either. Gain rev's loose ability to absorb harmonic imbalance.

And the Harmonic Balancer is quite small in diameter which also makes weight reductions less effective in terms of increased responsiveness, as inertia is quite small.

Back in the day when running small 4 cyl engines, lightening the flywheel (large inertia due to diameter) would make a small but noticeable difference, but for our large 4L engines, the Harmonc Balancer is not going to make a noticeable difference.

The statement that lighter is better stands, however it is just that the Balancer is not on it's own going to make a massive difference.