JWT vs Southbend Clutch/flywheel set-up

Joepro · 04-03-2014, 09:29 PM

break in is over rated IMO, do some heat cycles and some light stop and go traffic and let it rip, just pulled my clutch out after 25k hard miles, the last 1k boosted and it looked good, I upgraded it to a better disk, one of the daily disks with a higher TQ capacity.

forza370z · 01-03-2015, 02:50 AM

So JWT vs Southbend vs SZ, which kit is the best? I concern more on the drivability, performance and durability. I assume all the lw flywheels will have some noises. I am cool with that.

And what's the differences between the Southbend stage 2 daily and stage 3 daily. I know one rated 450 and the other rated 550. But how's the drivability between the 2 kits?

MJB · 01-03-2015, 03:15 AM

Quote:

Originally Posted by forza370z

So JWT vs Southbend vs SZ, which kit is the best? I concern more on the drivability, performance and durability. I assume all the lw flywheels will have some noises. I am cool with that.

And what's the differences between the Southbend stage 2 daily and stage 3 daily. I know one rated 450 and the other rated 550. But how's the drivability between the 2 kits?

I've had both the JWT and Southbend stage 2 setup. They both pretty much felt the same, and drivability is pretty much just like stock. The only time I could really tell I had an aftermarket clutch was when I would power shift or dump the clutch, it grabbed a lot harder than the stock setup. I also had the Southbend lightened flywheel. It was 22lbs (stock is 31lbs).. it was a little noisy when sitting at idle, but while you're driving you won't be able to hear it. Plus it revs up so much faster than the stock crap.

forza370z · 01-03-2015, 11:22 AM

Quote:

Originally Posted by MJB

I've had both the JWT and Southbend stage 2 setup. They both pretty much felt the same, and drivability is pretty much just like stock. The only time I could really tell I had an aftermarket clutch was when I would power shift or dump the clutch, it grabbed a lot harder than the stock setup. I also had the Southbend lightened flywheel. It was 22lbs (stock is 31lbs).. it was a little noisy when sitting at idle, but while you're driving you won't be able to hear it. Plus it revs up so much faster than the stock crap.

Great info as always.

Do you know how heavy is the JWT flywheel? Is it aluminum or steel? Also are both JWT and Sounthbent stage 2 kit can hold similar amount of power?

tranceformer · 01-06-2015, 10:35 PM

Quote:

Originally Posted by forza370z

Great info as always.

Do you know how heavy is the JWT flywheel? Is it aluminum or steel? Also are both JWT and Sounthbent stage 2 kit can hold similar amount of power?

I've had the JWT aluminum flywheel, it's about 16 lb.

Now I have the Southbend steel flywheel, iirc that one is about 21 lb.

Zoren 370 · 01-06-2015, 10:54 PM

^ which one do you like most? The JWT or the southbend?
Why the switch to a light weight to a 21lbs?

wsarver · 01-07-2015, 07:45 AM

Quote:

Originally Posted by Zoren 370

^ which one do you like most? The JWT or the southbend?
Why the switch to a light weight to a 21lbs?

I'd be willing to bet its chatter. Going to something heavier has no performance benefit so I'm assuming its to quiet things down a little.

forza370z · 01-07-2015, 08:23 AM

Quote:

Originally Posted by tranceformer

I've had the JWT aluminum flywheel, it's about 16 lb.

Now I have the Southbend steel flywheel, iirc that one is about 21 lb.

Do you feel the performance differences between the two?

forza370z · 01-07-2015, 08:28 AM

Also for you guys have JWT or Southbend for years, do you have thrust bearing issue or did you guys bypass the clutch start switch as you will dry start the bearing?

tranceformer · 01-07-2015, 08:43 PM

Quote:

Originally Posted by Zoren 370

^ which one do you like most? The JWT or the southbend?
Why the switch to a light weight to a 21lbs?

I had the JWT flywheel with a stock clutch for about 20k miles then swapped out for a Clutchmasters stage 1. After another 30k miles I broke a flywheel bolt and the head beat up the flywheel + clutch. It sounded HORRIBLE hearing that little bolt head bouncing around.

When I ordered the southbend flywheel +clutch I wasn't sure what broke yet so I just went with a different brand clutch and more durable steel flywheel.

Southbend flywheel is a bit quieter but to be honest the noise from the JWT never bothered me.

Quote:

Originally Posted by forza370z

Do you feel the performance differences between the two?

Slight difference I guess but I hardly drive it much lately (weekend fun car) and no matter what I do, it always feels like a rocket ship compared to my daily driver.

I hope this helps.

04-03-2014, 09:29 PM	#1 (permalink)
Joepro A True Z Fanatic Join Date: Aug 2012 Location: Athens ohio Posts: 1,213 Drives: Company car Rep Power: 34	break in is over rated IMO, do some heat cycles and some light stop and go traffic and let it rip, just pulled my clutch out after 25k hard miles, the last 1k boosted and it looked good, I upgraded it to a better disk, one of the daily disks with a higher TQ capacity. infamousAXEL likes this. __________________ Swift\|Koni\|SPC\| FI CBE\|Z1\|Stillen\|Sbend\|Zspeed\|R/T Tuned\|523 whp\|458 tq\|10.5 psi\|SOLD Joepro's Journal\|Joepro's Boosted Performance Build \|Pittsburgh-Western-Pa-Ohio-Wv-Group

01-03-2015, 02:50 AM	#2 (permalink)
forza370z A True Z Fanatic Join Date: Oct 2011 Location: 403 Forbidden Posts: 2,512 Drives: 2009 NISMO 370Z Rep Power: 19	So JWT vs Southbend vs SZ, which kit is the best? I concern more on the drivability, performance and durability. I assume all the lw flywheels will have some noises. I am cool with that. And what's the differences between the Southbend stage 2 daily and stage 3 daily. I know one rated 450 and the other rated 550. But how's the drivability between the 2 kits? __________________ 09 PW 370z Nismo \| K&N Drop Ins \| HKS Hi Power \| Berk HFCs \| Work Meister S1 3P \| Project Kics R40 Neo Chrome Lug Nuts \| KW V1 \| SPC rear camber arms/toe bolts \| Southbend Stage 3 daily clutch \| Southband 19Ib Steel Flywheel \| ZSpeed CSC

01-07-2015, 08:28 AM	#9 (permalink)
forza370z A True Z Fanatic Join Date: Oct 2011 Location: 403 Forbidden Posts: 2,512 Drives: 2009 NISMO 370Z Rep Power: 19	Also for you guys have JWT or Southbend for years, do you have thrust bearing issue or did you guys bypass the clutch start switch as you will dry start the bearing? __________________ 09 PW 370z Nismo \| K&N Drop Ins \| HKS Hi Power \| Berk HFCs \| Work Meister S1 3P \| Project Kics R40 Neo Chrome Lug Nuts \| KW V1 \| SPC rear camber arms/toe bolts \| Southbend Stage 3 daily clutch \| Southband 19Ib Steel Flywheel \| ZSpeed CSC

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01-06-2015, 10:54 PM	#6 (permalink)
Zoren 370 A True Z Fanatic Join Date: Mar 2012 Location: FL Posts: 11,018 Drives: 11 Nissan 370 M6 Rep Power: 1913654	^ which one do you like most? The JWT or the southbend? Why the switch to a light weight to a 21lbs?