Clutch, LW flywheel and chatter.... - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Dipstik-sportech · 11-16-2014, 11:58 PM

It's a heavy chunk of steel just as @zkv476 said it was. Not all cars use a DM or a viscous flywheel, actually I'd almost go so far as to say most don't.

zkv476 · 11-17-2014, 12:35 AM

Especially small engines like this. With a short crank and the boxer layout balancing primary harmonics it's not really necessary. A DMF is pretty obvious, they're big, heavy and look like they can be disassembled even more since there's bolts or they're welded together. Ours is a single cast plate that gets machined after.

37 · 11-17-2014, 06:14 AM

Quote:

Originally Posted by Dipstik-sportech

It's a heavy chunk of steel just as @zkv476 said it was.

Quote:

Originally Posted by zkv476

Ours is a single cast plate that gets machined after.

You are both correct. My mistake. I just dug my old flywheel out of the garage attic since it's been 1.5+ years since I last looked at it. I remembered it being overly thick and confused it with another flywheel I had on a previous car. Thanks

zkv476 · 11-17-2014, 11:35 AM

Quote:

Originally Posted by 37

You are both correct. My mistake. I just dug my old flywheel out of the garage attic since it's been 1.5+ years since I last looked at it. I remembered it being overly thick and confused it with another flywheel I had on a previous car. Thanks

Haha no worries, I had a very clear memory of it. I spent 8 hours on my back with the car on jack stands doing the clutch just a week ago, and man that kinda sucked :p.

mike the snake · 11-17-2014, 11:38 AM

I'd leave the stock front pulley on the car and go with lightened flywheel.

The flywheel makes a difference you can feel. The front pulley, while heavy, it's mass is much closer to center and has less effect.

Poodles · 11-17-2014, 01:52 PM

The clash you hear is the lash in the gears in the transmission. Common on just about any platform with a lightweight flywheel.

raiden8383 · 11-17-2014, 03:50 PM

Quote:

Originally Posted by wootwoot

I have read that the CF drive shaft acts as a dampener and can help quiet down the chatter. Maybe your car would be even louder with the stock drive shaft....

What clutch and flywheel do you have?

I have fx400 and driveshaft shop CF

11-16-2014, 11:58 PM	#15
Dipstik-sportech Senior Member Join Date: Oct 2012 Drives: 2013 BRZ satin white pearl sportech Location: Thunder Bay Ontario Canada Posts: 1,813 Thanks: 842 Thanked 911 Times in 576 Posts Mentioned: 43 Post(s) Tagged: 0 Thread(s)	It's a heavy chunk of steel just as @zkv476 said it was. Not all cars use a DM or a viscous flywheel, actually I'd almost go so far as to say most don't. __________________ 2013 SWP BRZ sportech. 11.11sec@129.01mph, 511whp on e70. FullBlown base kit, FullBlown built 9.5:1 engine, GTX3076R GEN2 turbo, 1700cc Bosch injectors, FullBlown flex fuel kit, FullBlown radiator and oil cooler, FullBlown custom 3" dual exit exhaust, act xtreme clutch, whiteline diff and subframe inserts, BC Racing coilovers, hotchkiss 18mm rear sway, is300 3.73 differential ... Never finished

11-17-2014, 12:35 AM	#16
zkv476 Senior Member Join Date: May 2014 Drives: 2014 SWP BRZ, MT Location: New Jersey Posts: 240 Thanks: 11 Thanked 140 Times in 90 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Especially small engines like this. With a short crank and the boxer layout balancing primary harmonics it's not really necessary. A DMF is pretty obvious, they're big, heavy and look like they can be disassembled even more since there's bolts or they're welded together. Ours is a single cast plate that gets machined after. __________________ The answer is racecar. Always.

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11-17-2014, 11:38 AM	#19
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I'd leave the stock front pulley on the car and go with lightened flywheel. The flywheel makes a difference you can feel. The front pulley, while heavy, it's mass is much closer to center and has less effect.

11-17-2014, 01:52 PM	#20
Poodles Senior Member Join Date: Oct 2013 Drives: 2015 Series.Blue Location: Fort Worth, TX Posts: 1,781 Thanks: 88 Thanked 781 Times in 481 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	The clash you hear is the lash in the gears in the transmission. Common on just about any platform with a lightweight flywheel.

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