eBay M20 Light Weight Pulley / Crank Dampner

[NigelStu]

I think the moral of this story is:

don't lick the lead box. cuz lead is bad, mm-kay.

[Jaxx_]

Lightening a flywheel does not give any additional power gains when under load at constant rpm but it does give more power under transient condidtions because less power is required to accelerate the lower inertia flywheel. Having said that the biggest effect is felt under lower gears 1 & 2 where rpms accelerate faster, you can work out how much mass you have equivalently reduces from the vehicle if you know how much mass and where it was taken from.

A lightened flywheel often makes clutch engagement more difficult because the engine has less inertia and can be slowed easier which is why people often wrongly claim it lowers torque. When the clutch is fully engaged there is never less torque.

I wish I was more eloquent. This was my point.

[nando]

but you said the engine has less torque. it doesn't change torque. the only thing that can change the torque output is to change the efficiency of the combustion.

[buguhrich]

^this man speaks the truth.

[digger]

but you said the engine has less torque. it doesn't change torque. the only thing that can change the torque output is to change the efficiency of the combustion.

not to mention the amount of combustion

[Luis325]

MAn Ive had a really bad experience with Lighweight crank pulleys..
I installed on on my Nissan Titan and 2 months later my flywheel cracked...
Put on a new one and 1 month later cracked again... Nissan told me to take off the damper cause it did not have the harmonic balncer and put the stcok one back on...

No more problems...
Wanted to scrap it, but a friend insisted he wnated it for his titan... LOL Installed it and 1 month later his flywheel was fucked up...

I would not even touch that without the balncer... Its very important

[einstein57]

It looks like it has a balancer to me. Isn't the trigger wheel the same thing as the balancer? So the op's question as to wether or not it will still trigger the cps has not been answered.

[nando]

the trigger wheel is built into the balancer, but it's not the same thing as the balancer. the weight itself is bonded to the plate that the trigger wheel is made of.

and sure, it has a balancer - but it's "lightened" to the point of being nearly non-existant. Whereas the stock balancer's weight has been fine tuned to the crank. They didn't just pick a random number because they liked it; "hey, let's make it 20lbs because that's a nice number. but it could be 5lbs and work fine."

[whodwho]

It looks like it has a balancer to me. Isn't the trigger wheel the same thing as the balancer? So the op's question as to wether or not it will still trigger the cps has not been answered.

No, the factory harmonic balancer is the flat part the pulleys bolt to and is two steel pieces bonded with rubber the outer piece absorbs the vibrations and has the teeth needed for the sensor.

I answered his question on the 2nd post.

The timing wheel is steel bolted on the pulley, there were some pic somewhere and you could see the fastners.

[einstein57]

Well if your reducing the weight of your rotating assembly (knife edge crank, h beam rods, forged pistons) wouldn't that then make the harmonic balancer heavier then it needed to be?