Nissan 370Z Forum  

JWT vs Southbend Clutch/flywheel set-up

Originally Posted by forza370z 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

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain


Like Tree29Likes

Reply
 
LinkBack Thread Tools Display Modes
Old 01-07-2015, 04:55 PM   #31 (permalink)
MJB
A True Z Fanatic
 
MJB's Avatar
 
Join Date: Aug 2011
Location: Tacoma, WA
Age: 41
Posts: 1,498
Drives: a POS truck
Rep Power: 496
MJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond repute
Default

Quote:
Originally Posted by forza370z View Post
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?
To be honest bro... I have no idea what the hell you are saying.. lol
jwick, forza370z, Rusty and 1 others like this.
__________________
09 Nismo #0483 sold. Viper or C7 next time around.
MJB is offline   Reply With Quote
Old 01-07-2015, 09:43 PM   #32 (permalink)
A True Z Fanatic
 
tranceformer's Avatar
 
Join Date: Nov 2008
Location: Palm Beach, FL
Posts: 1,213
Drives: 2009 370Z PW 6MT
Rep Power: 268
tranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond reputetranceformer has a reputation beyond repute
Default

Quote:
Originally Posted by Zoren 370 View Post
^ 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 View Post
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.
forza370z and wsarver like this.
__________________
Ray
2009 370Z Base Sport 6MT / 12.860 @ 109.09mph / 1.921 60ft / street tires
official 1/4 mile track times
tranceformer is offline   Reply With Quote
Old 01-07-2015, 11:01 PM   #33 (permalink)
Base Member
 
Join Date: Mar 2014
Location: Fayetteville, NC
Posts: 97
Drives: '12 Sport/Tour/Nav
Rep Power: 15
thangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond reputethangcu35 has a reputation beyond repute
Default

Quote:
Originally Posted by MJB View Post
To be honest bro... I have no idea what the hell you are saying.. lol
Usually with upgraded pressure plate, there will be increased load/wear on the thrust washers in the crankshaft during the initial crank/start up because there is little oil to lubricate the washers before pressure gets a chance to build up. When thrust washers get worn out, crank walk will result. A lot of people bypass the clutch start switch when running high tq capacity clutch setup so that there is no load on the thrust washers during cranking.
forza370z and Elmo370z like this.
thangcu35 is offline   Reply With Quote
Old 01-07-2015, 11:23 PM   #34 (permalink)
A True Z Fanatic
 
Zoren 370's Avatar
 
Join Date: Mar 2012
Location: FL
Posts: 11,018
Drives: 11 Nissan 370 M6
Rep Power: 1913653
Zoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond repute
Default

^ how to bypass the clutch start switch? Whats a crank walk?

Last edited by Zoren 370; 01-07-2015 at 11:27 PM.
Zoren 370 is offline   Reply With Quote
Old 01-07-2015, 11:33 PM   #35 (permalink)
A True Z Fanatic
 
zguynate's Avatar
 
Join Date: Jan 2012
Location: Strangeland
Posts: 1,054
Drives: 09 370z
Rep Power: 73
zguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond reputezguynate has a reputation beyond repute
Default

Quote:
Originally Posted by Zoren 370 View Post
^ how to bypass the clutch start switch? Whats a crank walk?
You can bypass the clutch switch by modifying the wiring to the actual switch on the pedal. Crank walk is when the crank moves front to back, which is catastrophic to the engine.

I haven't heard of any crank walk issues on the 370z though. Im not saying that there havent been any, but I haven't heard of any cases.
__________________
2009 370z touring w/sports package
zguynate is offline   Reply With Quote
Old 01-07-2015, 11:57 PM   #36 (permalink)
MJB
A True Z Fanatic
 
MJB's Avatar
 
Join Date: Aug 2011
Location: Tacoma, WA
Age: 41
Posts: 1,498
Drives: a POS truck
Rep Power: 496
MJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond reputeMJB has a reputation beyond repute
Default

Quote:
Originally Posted by thangcu35 View Post
Usually with upgraded pressure plate, there will be increased load/wear on the thrust washers in the crankshaft during the initial crank/start up because there is little oil to lubricate the washers before pressure gets a chance to build up. When thrust washers get worn out, crank walk will result. A lot of people bypass the clutch start switch when running high tq capacity clutch setup so that there is no load on the thrust washers during cranking.
Lol... wow, that sounds really scientific for a clutch install. I've never heard anything like that before.
__________________
09 Nismo #0483 sold. Viper or C7 next time around.
MJB is offline   Reply With Quote
Old 01-08-2015, 12:53 AM   #37 (permalink)
A True Z Fanatic
 
forza370z's Avatar
 
Join Date: Oct 2011
Location: 403 Forbidden
Posts: 2,512
Drives: 2009 NISMO 370Z
Rep Power: 19
forza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to behold
Default

Quote:
Originally Posted by MJB View Post
To be honest bro... I have no idea what the hell you are saying.. lol
Sorry I didn't explain this well... Lol. So basically most aftermarket clutches have high spring load that will add extra force on the main thrust bearings when you depress the clutch and cause premature main thrust bearing wear. If the thrust bearings wear out it will cause the "Crank Walk" and eventually engine failure. This won't happen immediately but after 30k-40k driving. My friend's 350 had this issue. He had to rebuild the engine. My mechanic friend who worked on vqs for 12 years told me bypass the clutch start switch is a must for those clutches(that includes the JWT). However, while I am doing researches I found Z1 pointed this out and claimed their clutch has the low spring load while still keeping the high clamping force which looks pretty promising to me. That's why I want to ask you guys that have JWT or Southbend clutches on your car for a while has encountered anything like that.

Here is the quote from Z1:

The pressure plate in this kit exceeds OEM specifications and features high clamping force while maintaining a low spring load. A low spring load eases lateral force on the main thrust bearings in your engine which is especially important during "dry" start-up. (High pressure plate spring loads result in high lateral forces being exerted on the crank when the pedal is depressed and the clutch is disengaged which can cause premature thrust bearing failure resulting in "crank walk" and ultimately engine failure).

Z1 370Z / G37 Clutch and Flywheel Combo
__________________
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
forza370z is offline   Reply With Quote
Old 01-08-2015, 02:09 AM   #38 (permalink)
Base Member
 
Nick Servin's Avatar
 
Join Date: Dec 2014
Location: Vallejo, CA
Age: 32
Posts: 48
Drives: 09 Nissan 370z Tour
Rep Power: 10
Nick Servin is on a distinguished road
Default

Quote:
Originally Posted by forza370z View Post
Sorry I didn't explain this well... Lol. So basically most aftermarket clutches have high spring load that will add extra force on the main thrust bearings when you depress the clutch and cause premature main thrust bearing wear. If the thrust bearings wear out it will cause the "Crank Walk" and eventually engine failure. This won't happen immediately but after 30k-40k driving. My friend's 350 had this issue. He had to rebuild the engine. My mechanic friend who worked on vqs for 12 years told me bypass the clutch start switch is a must for those clutches(that includes the JWT). However, while I am doing researches I found Z1 pointed this out and claimed their clutch has the low spring load while still keeping the high clamping force which looks pretty promising to me. That's why I want to ask you guys that have JWT or Southbend clutches on your car for a while has encountered anything like that.

Here is the quote from Z1:

The pressure plate in this kit exceeds OEM specifications and features high clamping force while maintaining a low spring load. A low spring load eases lateral force on the main thrust bearings in your engine which is especially important during "dry" start-up. (High pressure plate spring loads result in high lateral forces being exerted on the crank when the pedal is depressed and the clutch is disengaged which can cause premature thrust bearing failure resulting in "crank walk" and ultimately engine failure).

Z1 370Z / G37 Clutch and Flywheel Combo
I got a JWT Clutch and flywheel.Love it performance wise but not the chatter sounds like im running on no oil.Plus my CMC is going out
__________________
6MT 370z Sport Tour|TWM Shifter|JWT Clutch/Flywheel|Z1 CSC/Clutch lines|Berk HFC's|Berk Xpipe/CBE|HPS MAF/K&N drop ins|nismo 19" matt blk wheels|Hankook Evo V12 tires|Stop Tech Rotors|Eibach Springs|SPC Camber Arms|Hotchkis Sway Bars|3M Tint|Black Fangz
Nick Servin is offline   Reply With Quote
Old 01-08-2015, 09:31 AM   #39 (permalink)
A True Z Fanatic
 
forza370z's Avatar
 
Join Date: Oct 2011
Location: 403 Forbidden
Posts: 2,512
Drives: 2009 NISMO 370Z
Rep Power: 19
forza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to behold
Default

Quote:
Originally Posted by Nick Servin View Post
I got a JWT Clutch and flywheel.Love it performance wise but not the chatter sounds like im running on no oil.Plus my CMC is going out
Did you change out the CSC and CMC when you install the clutch?
__________________
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
forza370z is offline   Reply With Quote
Old 01-10-2015, 09:39 AM   #40 (permalink)
Track Member
 
Join Date: Jul 2012
Location: New Jersey
Posts: 997
Drives: 11 Nissan 370Z BS M6
Rep Power: 14
PharmDZ is on a distinguished road
Default

I did a new CMC, the zspeed CSC, and stage two daily clutch and steel flywheel from south bend. I love it! Revs noticeably faster for me, but the chatter isn't terrible. I honestly think engagement is smoother than my stock clutch as well. I also have some peace of mind now that I've been autocrossing and tracking the car on a consistent basis. I switched it all out due to CSC failure around 35k miles.
forza370z likes this.
PharmDZ is offline   Reply With Quote
Old 01-10-2015, 10:07 AM   #41 (permalink)
A True Z Fanatic
 
Zoren 370's Avatar
 
Join Date: Mar 2012
Location: FL
Posts: 11,018
Drives: 11 Nissan 370 M6
Rep Power: 1913653
Zoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond reputeZoren 370 has a reputation beyond repute
Default

So you say it accelerates faster now? How much labor cost you to install everything for your clutch flywheel csc cmc etc.?
Thanks
Zoren 370 is offline   Reply With Quote
Old 01-10-2015, 10:50 AM   #42 (permalink)
A True Z Fanatic
 
forza370z's Avatar
 
Join Date: Oct 2011
Location: 403 Forbidden
Posts: 2,512
Drives: 2009 NISMO 370Z
Rep Power: 19
forza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to behold
Default

Quote:
Originally Posted by PharmDZ View Post
I did a new CMC, the zspeed CSC, and stage two daily clutch and steel flywheel from south bend. I love it! Revs noticeably faster for me, but the chatter isn't terrible. I honestly think engagement is smoother than my stock clutch as well. I also have some peace of mind now that I've been autocrossing and tracking the car on a consistent basis. I switched it all out due to CSC failure around 35k miles.
That's good to hear. Do you know how much power the stage 2 can handle? Coz I might go boost at some point. That's also a main reason I want to upgrade the clutch.

Anyone has experience with the Southbend stage 3 daily kit? How it drives?
__________________
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
forza370z is offline   Reply With Quote
Old 01-10-2015, 12:03 PM   #43 (permalink)
Track Member
 
Join Date: Jul 2012
Location: New Jersey
Posts: 997
Drives: 11 Nissan 370Z BS M6
Rep Power: 14
PharmDZ is on a distinguished road
Default

Stage 2 daily is rated for 380lb/ft. I'm staying NA so that's plenty for me.
forza370z likes this.
PharmDZ is offline   Reply With Quote
Old 01-21-2015, 09:24 AM   #44 (permalink)
A True Z Fanatic
 
MacLean's Avatar
 
Join Date: Apr 2012
Location: Houston
Posts: 1,589
Drives: '12 GM Nismo # 0445
Rep Power: 16
MacLean has a spectacular aura aboutMacLean has a spectacular aura aboutMacLean has a spectacular aura about
Default

When my stock CSC went out, I decided to replace the stock clutch and flywheel as well. I went with the JWT clutch and flywheel and the ZSpeed HD CSC. I agree with the previous posts on being able to go through the RPM's quicker and it was a noticeable difference, but there is more chatter noise while idling.

I did not know about this high spring load that will add extra force on the main thrust bearings. I appreciate the explanation about this. I was told and have heard to go with JWT over Southbend, but it really comes to personal preference.
forza370z likes this.
__________________
l Meisterschaft Full Cat-Back Exhaust l F. I. Resonated High Flow Cats l Stillen Gen 3 l M370 Intake Manifold l UpRev l JWT Clutch & Flywheel l ZSpeed HD CSC l Stillen 19 Row Oil Cooler l ZSpeed Powercoated Under Tray l GTSpec: 6, 4, 2 Point Brace l
MacLean is offline   Reply With Quote
Old 01-21-2015, 10:23 AM   #45 (permalink)
A True Z Fanatic
 
forza370z's Avatar
 
Join Date: Oct 2011
Location: 403 Forbidden
Posts: 2,512
Drives: 2009 NISMO 370Z
Rep Power: 19
forza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to beholdforza370z is a splendid one to behold
Default

Quote:
Originally Posted by MacLean View Post
When my stock CSC went out, I decided to replace the stock clutch and flywheel as well. I went with the JWT clutch and flywheel and the ZSpeed HD CSC. I agree with the previous posts on being able to go through the RPM's quicker and it was a noticeable difference, but there is more chatter noise while idling.

I did not know about this high spring load that will add extra force on the main thrust bearings. I appreciate the explanation about this. I was told and have heard to go with JWT over Southbend, but it really comes to personal preference.
I am in the same shoes as you were. CSC is on it's way out. Decided to upgrade the clutch/FW as well. I just ordered Southbend stage 3 daily with the steel flywheel.
__________________
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
forza370z is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
♦ Southbend Clutch/Flywheel Combos + Free Bonus Parts, $1 Shipping, NO CHATTER!! ♦ Coz@Czp Drivetrain/Engine 20 05-25-2018 11:27 AM
Don't Be A Victim of No Clutch November - Rev Works SouthBend Clutch Specials Marti Drivetrain/Engine 36 12-31-2013 12:48 PM
[FOR SALE] Southbend DXD SS Feramic Stage 5 x series Clutch $400 Bernie (NoVA) Parts for sale (Private Classifieds) 0 10-26-2012 02:55 PM
[FOR SALE] [NEW] Southbend Clutch (500tq) Synack Parts for sale (Private Classifieds) 11 05-15-2012 09:41 PM
[FOR SALE] SouthBend Stage 2 Clutch Staples Parts for sale (Private Classifieds) 3 03-11-2012 03:11 PM


All times are GMT -5. The time now is 03:00 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2