Nissan 370Z Forum  

O.S. Giken "DualCore" LSD

Seems like play toward the more street oriented, or dual-purpose crowd, that don't want to use a diff cooler, which is basically everybody with these cars. I actually am pulling

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Track / Autocross / Drifting / Dragstrip


Like Tree40Likes

Reply
 
LinkBack Thread Tools Display Modes
Old 10-16-2024, 06:54 PM   #16 (permalink)
Base Member
 
prandelia's Avatar
 
Join Date: Sep 2021
Location: Louisville, KY
Posts: 65
Drives: 2014 Nismo 370Z
Rep Power: 300
prandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond repute
Default

Seems like play toward the more street oriented, or dual-purpose crowd, that don't want to use a diff cooler, which is basically everybody with these cars.

I actually am pulling my 1.5 OSG LSD to send back to them for a rebuild and setup change. Ever since going to stiffer springs and sticky tires like RE71RS, the inside wheel spins so badly in corners and curbs, it's not even worth driving anymore at the track. Not sure if it's all my car setup/power, or a combination of high wear when I first installed it and didn't have a diff cooler for a couple track days, and only had a Z1 diff cover (which are absolute garbage BTW, they actually increase oil temps because they don't adequately lubricate things inside like an OEM one does with the rounded interior). Trust me, everybody should ditch those and just use the Nismo cover, which I did switch to, in addition to a cooler.

Regardless, the LSD needs adjustment.

The idea of a Wavetrac sounds great, but the lack of lock on coast/decel still bothers me. Who knows, maybe they still work great on track. Not having to run a diff cooler certainly would be nice, and make diff oil changes a helluva lot easier.
redondoaveb and filip00 like this.
__________________
2014-Nismo 370Z / 2025-992 GT3RS / 2024-C8 Z07 / 2018-991.2 GT3 / 2011-997.2 GT3RS / 2016-981 GT4 / 2013-E92 M3 / 1988-E30 M3 / 2015-FRS - GLTC race car

Last edited by prandelia; 10-16-2024 at 06:57 PM.
prandelia is offline   Reply With Quote
Old 10-17-2024, 01:14 AM   #17 (permalink)
A True Z Fanatic
 
redondoaveb's Avatar
 
Join Date: Apr 2017
Location: So. Commiefornia
Posts: 6,366
Drives: 2014 Nismo Gunmetal
Rep Power: 2684374
redondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond repute
Default

Quote:
Originally Posted by prandelia View Post
Seems like play toward the more street oriented, or dual-purpose crowd, that don't want to use a diff cooler, which is basically everybody with these cars.

I actually am pulling my 1.5 OSG LSD to send back to them for a rebuild and setup change. Ever since going to stiffer springs and sticky tires like RE71RS, the inside wheel spins so badly in corners and curbs, it's not even worth driving anymore at the track. Not sure if it's all my car setup/power, or a combination of high wear when I first installed it and didn't have a diff cooler for a couple track days, and only had a Z1 diff cover (which are absolute garbage BTW, they actually increase oil temps because they don't adequately lubricate things inside like an OEM one does with the rounded interior). Trust me, everybody should ditch those and just use the Nismo cover, which I did switch to, in addition to a cooler.

Regardless, the LSD needs adjustment.

The idea of a Wavetrac sounds great, but the lack of lock on coast/decel still bothers me. Who knows, maybe they still work great on track. Not having to run a diff cooler certainly would be nice, and make diff oil changes a helluva lot easier.
1) The OS Giken is tuned from the factory for stock power and street use. It definitely needs to be tuned for track use, and/or higher than stock power

2) I completely agree with you on the Z1 cover. I scrapped mine for my new build and had a Nismo cover installed instead.

3) Rob Fuller from Z Car Garage runs OS Giken's on all of his race cars, including his IMSA car and doesn't run an oil cooler on any of his cars and has never had a diff failure. Take that for what it's worth but he's a reputable source.
sx moneypit likes this.
__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
700+whp
redondoaveb is offline   Reply With Quote
Old 10-17-2024, 02:25 PM   #18 (permalink)
A True Z Fanatic
 
Join Date: Jun 2014
Location: Ga
Posts: 13,830
Drives: 2013 Nismo 370z
Rep Power: 2684392
Spooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond repute
Default

Quote:
Originally Posted by redondoaveb View Post
1) The OS Giken is tuned from the factory for stock power and street use. It definitely needs to be tuned for track use, and/or higher than stock power

2) I completely agree with you on the Z1 cover. I scrapped mine for my new build and had a Nismo cover installed instead.

3) Rob Fuller from Z Car Garage runs OS Giken's on all of his race cars, including his IMSA car and doesn't run an oil cooler on any of his cars and has never had a diff failure. Take that for what it's worth but he's a reputable source.
I puked diff fluid out the vent tube of my OS Giken on the Tail of the Dragon. In my eyes, you need it. Plus, your diff fluid last longer. No need to change it after every track day.
filip00 likes this.
Spooler is online now   Reply With Quote
Old 10-17-2024, 06:22 PM   #19 (permalink)
Base Member
 
prandelia's Avatar
 
Join Date: Sep 2021
Location: Louisville, KY
Posts: 65
Drives: 2014 Nismo 370Z
Rep Power: 300
prandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond repute
Default

Quote:
Originally Posted by Spooler View Post
I puked diff fluid out the vent tube of my OS Giken on the Tail of the Dragon. In my eyes, you need it. Plus, your diff fluid last longer. No need to change it after every track day.
Agreed. My car would have puked regardless of what diff cover I had on my car with the OSG LSD on track.

I think between my aggressive track setup (springs/bars/tires) etc. and making 340 WHP, along with the 3.92 final drive from the 2016+ Nismo, it just puts too much power down for the OTS setup.
I should have consulted with them first, because most of the time their OTS setups work great for track cars, but just doesn't seem to be the case for the 370.
__________________
2014-Nismo 370Z / 2025-992 GT3RS / 2024-C8 Z07 / 2018-991.2 GT3 / 2011-997.2 GT3RS / 2016-981 GT4 / 2013-E92 M3 / 1988-E30 M3 / 2015-FRS - GLTC race car
prandelia is offline   Reply With Quote
Old 10-17-2024, 07:16 PM   #20 (permalink)
A True Z Fanatic
 
Join Date: Jun 2014
Location: Ga
Posts: 13,830
Drives: 2013 Nismo 370z
Rep Power: 2684392
Spooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond repute
Default

Quote:
Originally Posted by prandelia View Post
Agreed. My car would have puked regardless of what diff cover I had on my car with the OSG LSD on track.

I think between my aggressive track setup (springs/bars/tires) etc. and making 340 WHP, along with the 3.92 final drive from the 2016+ Nismo, it just puts too much power down for the OTS setup.
I should have consulted with them first, because most of the time their OTS setups work great for track cars, but just doesn't seem to be the case for the 370.
My car was bone stock with the 3.69 OS Giken. No tune. All I had was a 2.5in. Fast Intentions exhaust. Suspension was upgraded, wheels and tires. This was before I went twin turbo.
Spooler is online now   Reply With Quote
Old 10-17-2024, 07:19 PM   #21 (permalink)
A True Z Fanatic
 
Join Date: Jun 2014
Location: Ga
Posts: 13,830
Drives: 2013 Nismo 370z
Rep Power: 2684392
Spooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond repute
Default

I now have an OS Giken tuned 3.357 rear auto diff now. It was tuned for 900whp. No more one-wheel peel. I still have my diff cooler. My Essex parts AP racing brakes are excellent. No more hot spotted rotors while out having fun.
Spooler is online now   Reply With Quote
Old 10-18-2024, 03:19 AM   #22 (permalink)
Track Member
 
filip00's Avatar
 
Join Date: May 2021
Location: slovenia
Posts: 558
Drives: 370z pack
Rep Power: 125427
filip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond reputefilip00 has a reputation beyond repute
Default

Reading these last several posts got me thinking.....I have shorter final drive (4.08) and pretty stiff suspension setup. In super tight corners I feel the inside wheel spinning through after which it locks up. The LSD is stock OS Giken. Does this mean that stock OSG setup isn't good, i.e. it's too loose and should be setup specifically for "higher power" i.e. to lock up sooner?
__________________
ride epic drive epic
filip00 is offline   Reply With Quote
Old 10-18-2024, 08:54 AM   #23 (permalink)
Base Member
 
prandelia's Avatar
 
Join Date: Sep 2021
Location: Louisville, KY
Posts: 65
Drives: 2014 Nismo 370Z
Rep Power: 300
prandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond reputeprandelia has a reputation beyond repute
Default

Quote:
Originally Posted by filip00 View Post
Reading these last several posts got me thinking.....I have shorter final drive (4.08) and pretty stiff suspension setup. In super tight corners I feel the inside wheel spinning through after which it locks up. The LSD is stock OS Giken. Does this mean that stock OSG setup isn't good, i.e. it's too loose and should be setup specifically for "higher power" i.e. to lock up sooner?
May be the case. The locking can be set in a couple different ways, how fast it locks and how much it locks. I like progressive lock the OTS setup has, not an on-off switch, so it works better on track, but I want the amount of lock to be increased significantly to avoid wheel spin.
OS can tune both and will set it up accordingly. It seems pretty clear the OTS setup is on the soft side for whatever reason.
filip00 likes this.
__________________
2014-Nismo 370Z / 2025-992 GT3RS / 2024-C8 Z07 / 2018-991.2 GT3 / 2011-997.2 GT3RS / 2016-981 GT4 / 2013-E92 M3 / 1988-E30 M3 / 2015-FRS - GLTC race car
prandelia is offline   Reply With Quote
Old 10-18-2024, 11:49 AM   #24 (permalink)
A True Z Fanatic
 
Join Date: Jun 2014
Location: Ga
Posts: 13,830
Drives: 2013 Nismo 370z
Rep Power: 2684392
Spooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond reputeSpooler has a reputation beyond repute
Default

Quote:
Originally Posted by prandelia View Post
May be the case. The locking can be set in a couple different ways, how fast it locks and how much it locks. I like progressive lock the OTS setup has, not an on-off switch, so it works better on track, but I want the amount of lock to be increased significantly to avoid wheel spin.
OS can tune both and will set it up accordingly. It seems pretty clear the OTS setup is on the soft side for whatever reason.
Yeah, I learned my lesson on my first one. I had my new one tuned by OS Giken. I called and was talking to them. $150 bucks, Oh yeah I am getting mine tuned.
filip00 likes this.
Spooler is online now   Reply With Quote
Old 10-18-2024, 05:28 PM   #25 (permalink)
A True Z Fanatic
 
cv129's Avatar
 
Join Date: Jul 2011
Location: Dallas, TX
Posts: 3,235
Drives: 09 Nismo, 16 Nismo
Rep Power: 163995
cv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond reputecv129 has a reputation beyond repute
Default

Quote:
Originally Posted by prandelia View Post
had a Z1 diff cover (which are absolute garbage BTW, they actually increase oil temps because they don't adequately lubricate things inside like an OEM one does with the rounded interior). Trust me, everybody should ditch those and just use the Nismo cover, which I did switch to, in addition to a cooler.
Quote:
Originally Posted by redondoaveb View Post
1)

2) I completely agree with you on the Z1 cover. I scrapped mine for my new build and had a Nismo cover installed instead.
Many years ago, I caught a video from Gale Banks (Banks Power) on diff cover interior curvature and how that affects fluid temp, aeration, gear lubrications, etc etc…he had an experiment with clear diff covers to show the theory. Since then, it was an easy conclusion for me to skip the Z1 cover.

When I do diff upgrade, Nismo cover will be my choice.

He even did air flow testing behind the diff cover and came up with a pretty cool design to guide the moving air into the cooling fins. Wish we can have that.
redondoaveb and Averying like this.
__________________
Setrab | RE-71 | SPL | JRZ | Nismo | ARK | Whiteline | RacingBrake | CJM Oil Pan | Ti shield

Last edited by cv129; 10-18-2024 at 05:31 PM.
cv129 is offline   Reply With Quote
Old 10-20-2024, 06:13 PM   #26 (permalink)
A True Z Fanatic
 
Tractionless's Avatar
 
Join Date: Jan 2016
Location: Atlantic SE
Posts: 1,326
Drives: '10 K23 ST 7AT
Rep Power: 30525
Tractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond repute
Default

Quote:
Originally Posted by OptionZero View Post
The OS Giken needs a cooler, though, which is another $1,000

I believe the Wavetrac doesn't need one. That's a big advantage


Speak of which

Since the "Dual Core" is a mix of helical and clutch . . . . do we think it will need a cooler?
For all,

Why does an aftermarket differential require a cooler?
__________________
Toys Not Tots
Tractionless is offline   Reply With Quote
Old 10-20-2024, 06:25 PM   #27 (permalink)
Enthusiast Member
 
Averying's Avatar
 
Join Date: May 2018
Location: Rhode Island
Posts: 478
Drives: '09 370Z, '03 G35
Rep Power: 14419
Averying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond reputeAverying has a reputation beyond repute
Default

Quote:
Originally Posted by Tractionless View Post
For all,

Why does an aftermarket differential require a cooler?

Clutch type diff = more heat generated.

The Wavetrac doesn’t need a cooler because it’s a helical diff, not a clutch type diff.


Sent from my iPhone using Tapatalk
Rusty and Spooler like this.
__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes
Averying is offline   Reply With Quote
Old 10-27-2024, 11:21 AM   #28 (permalink)
A True Z Fanatic
 
Tractionless's Avatar
 
Join Date: Jan 2016
Location: Atlantic SE
Posts: 1,326
Drives: '10 K23 ST 7AT
Rep Power: 30525
Tractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond reputeTractionless has a reputation beyond repute
Default

Quote:
Originally Posted by Averying View Post
Clutch type diff = more heat generated.

The Wavetrac doesn’t need a cooler because it’s a helical diff, not a clutch type diff.


Sent from my iPhone using Tapatalk
That's what I assumed and wouldn't want a clutch type for street usage anyway as I don't need track car tunability, nor do I want to get into clutch pack maintenance. Thanks for the insight!
__________________
Toys Not Tots
Tractionless is offline   Reply With Quote
Old 10-27-2024, 01:59 PM   #29 (permalink)
A True Z Fanatic
 
redondoaveb's Avatar
 
Join Date: Apr 2017
Location: So. Commiefornia
Posts: 6,366
Drives: 2014 Nismo Gunmetal
Rep Power: 2684374
redondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond reputeredondoaveb has a reputation beyond repute
Default

Quote:
Originally Posted by Tractionless View Post
That's what I assumed and wouldn't want a clutch type for street usage anyway as I don't need track car tunability, nor do I want to get into clutch pack maintenance. Thanks for the insight!
The OS Giken works absolutely beautifully on the street. They come with a street tune. If you use the OS Giken fluid and change it periodically, the diff rarely needs maintenance
Rusty and KapitalZ like this.
__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
700+whp
redondoaveb is offline   Reply With Quote
Old 10-27-2024, 05:45 PM   #30 (permalink)
Ronin Samurai - Assassin
 
Rusty's Avatar
 
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 68
Posts: 35,217
Drives: 2011 Nismo GM 6M
Rep Power: 2684438
Rusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond repute
Talking

Quote:
Originally Posted by redondoaveb View Post
The OS Giken works absolutely beautifully on the street. They come with a street tune. If you use the OS Giken fluid and change it periodically, the diff rarely needs maintenance
You will know when to change the fluid. It starts to make noise. Mine needs changed.
redondoaveb likes this.
__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html
Rusty 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
New to the "Z" world.. Is a "Sprint Booster" worth it?? newls196 Engine & Drivetrain 29 03-07-2016 11:21 AM
When did "Z" replace "Nissan" logo on key fobs? AlphaSnacks Nissan 370Z General Discussions 23 03-27-2011 11:47 PM
I guess this will be my "build thread" or..."journal?"... atx370z atx370z Member's 370Z Gallery 15 09-15-2010 01:10 PM
"Dancing with the Dealer" with the 40th - hope to be in the "New Owner" section soon optiontrader New Forum Member 8 08-04-2010 12:37 AM
"Warning" Carbon Fiber Z emblems "DO NOT FIT" NXTAZEE Exterior & Interior 2 12-20-2009 04:49 AM


All times are GMT -5. The time now is 05:04 PM.


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