Average Mileage for Clutch Replacement?

no, the dual mass OEM flywheel CANNOT be turned/resurfaced.




again, less unsprung weight, means quicker power. the actual output will not be changed, just when you get it.
its like when changing the differential. your power does not change, you just get it quicker.

thank you jeffro


i try not to quote sponsor websites because i dont want to be biased. i am talking based on experience. my car revs quicker, engages quicker and tighter, and even though i upgraded to staggered wheels, and i have more rubber on the ground, i can burn them quicker, and longer.

I'm at 156K and still going strong on my clutch. No slippage. Got the O-rings on the VANOS replaces and she's lively once again!

I'll replace it anyway at years end, as all my manual cars before have just quit at random.

Originally Posted by Sevenscars

It takes MORE energy to move an heavy object as opposed to light one. No Sh&% once in movement its gonna have more momentum -which required more energy/fuel to get moving in the first place - a point I was making.

If Im wrong ... .I will go with EXTRA heavyweight flywheel next time. Who sells those by the way?

You cannot deny a light weight flywheel at 5000rpm will have lower angular momentum (aka torque) than a heavier flywheel at the same rpm. When the clutch engages, there's less momentum transferred to the drive train by the light flywheel. Light flywheel loses torque. It is true.

you cannot deny that the flywheel is merely a moving disc. it does not create, or lose torque. it only transfers it.

Originally Posted by beingdevious

you cannot deny that the flywheel is merely a moving disc. it does not create, or lose torque. it only transfers it.

If you start with lower toque, there's less to transfer, unless you can show us a magic trick to make a low torque flywheel transfer more torque than it had. The only way to increase the torque is increasing rpm and that means more fuel use.

the flywheel doesnt make torque! you do not lose torque in the mass of the flywheel. the only physical way to lose power is by slipping.
you are not starting with lower torque. you are starting with the same amount you had with the OEM flywheel. the engine output is the exact same.

slipping will cause friction, and thus heat. heat is the loss of energy. IF your clutch grips, then the transfer is complete and the engine output is translated to the pressureplate/transmission.

i swear, im talking to a wall.

Originally Posted by beingdevious

i swear, im talking to a wall.

i can gurantee you that i will put the SAME torque to the transmission as i did before. without more fuel consumption.. BECAUSE the only difference is the millisecond that i reach 4k rpm and shift.

instead of reaching X torque at 0.002 seconds, i am reaching X torque at 0.001 seconds. the output is NOT affected.
(not real world examples, just numbers)

the only way i could have higher fuel consumption is if i were to redline the engine every time i shift.
if anything, i have better fuel consumption because i dropped 19.6 lbs. the engine has to work less to get to X rpm.

Originally Posted by beingdevious

the flywheel doesnt make torque! you do not lose torque in the mass of the flywheel. the only physical way to lose power is by slipping.
you are not starting with lower torque. you are starting with the same amount you had with the OEM flywheel. the engine output is the exact same.

slipping will cause friction, and thus heat. heat is the loss of energy. IF your clutch grips, then the transfer is complete and the engine output is translated to the pressureplate/transmission.

i swear, im talking to a wall.

Let's do some simple kindergarten physics before we get confused.

Momentum = mass x velocity
Torque = anugular momentum

Is it clear now where the weight, ie mass, of the flywheel plays a part in the resulting torque ?

Originally Posted by GoingNuts

Lets do some simple kindergarten physics before we get confused.

Momentum = mass x velocity
Torque = anugular momentum

Is it clear now where the weight, ie mass, of the flywheel plays a part in the resulting torque ?

We?

The only person confused here is you.

did you read the article i quoted? do i need to post an even more dumbed-down version for you?


(Had to peek and see what he was saying )

ok, i understand your stance. i have from the beginning. but your logic is skewed.

yes, the flywheel stores momentum/mass
yes, the flywheel transfers that mass
no, the flywheel does not affect output

i know it's from a sponsor, but i think it gets the point across.

Originally Posted by beingdevious

ok, i understand your stance. i have from the beginning. but your logic is skewed.

yes, the flywheel stores momentum/mass
yes, the flywheel transfers that mass
no, the flywheel does not affect output

The clutch is a torque transfer device. If you start with less torque, there will be less torque at the wheels. So the flywheel has everything to do with the torque output.

how, HOW is the flywheel affecting the engines output of torque. please, in what universe are you quoting these physics?



you are starting with the exact same torque, with an OEM flywheel, a lightweight, or a ****ing paper plate. the engine output is the same.
you are not starting with less torque. you are only transferring it sooner. please stop. im actually laughing so hard now that my dogs are barking.

Originally Posted by GoingNuts

The clutch is a torque transfer device. If you start with less torque, there will be less torque at the wheels. So the flywheel has everything to do with the torque output.

The flywheel only stores torque produced by the engine. Weight of the flywheel affects how much it stores. Heavier flywheel means more momentum.
however, this is only before full engagement.
after engagement, the heavier flywheel will not accelerate as quickly, resulting in slower overall acceleration of the car. you fell for the false torque effect. see graph.

get it now?

the only question is will they hold up when you supercharge or turbo your car,.. why would i ask that? energy tran,..... trannn.. tran.. whats the word..

Originally Posted by GoingNuts

More mass means greater momentum. That's an undeniable fact. Guess what greater momentum means ? It means the car can maintain its speed with minimal force input. When momentum is reduced, more force is required, and this translates to greater energy input.

Now, defend your position reduced momentum does not require increased force input to retain the same speed.

More mass means greater inertia, too, and wouldn't that mean it would take greater force (and therefore more energy) to initially overcome that inertia and bring the flywheel to a specific revolutionary speed and torque output compared to a flywheel with less mass, and wouldn't this extra energy input somewhat negate any energy savings allowed by the greater constant momentum of a more massive flywheel?

Originally Posted by sonspot

the only question is will they hold up when you supercharge or turbo your car,.. why would i ask that? energy tran,..... trannn.. tran.. whats the word..

yes, the clutch is going to be the bearer of burden. its the one that needs to hold up to the amount of output, as its the physical component between the flywheel and the pressure plate.

Originally Posted by Krystian_E46

i replaced my clutch at 109k a month after i got my car, it was time for a new clutch because it fell apart (the springs broke)

because you were tailgating and reared your friend?,..

am messing with you