Nissan 370Z Forum  

True Rear vs. Divorced spring (causes damage?)

It's perfectly fine for the Z even hitting track curbs. Now if you had a Porsche GT3 or 4.

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Brakes & Suspension


Like Tree53Likes

Reply
 
LinkBack Thread Tools Display Modes
Old 01-24-2020, 08:41 AM   #16 (permalink)
A True Z Fanatic
 
2011 Nismo#91's Avatar
 
Join Date: Mar 2011
Location: NJ
Posts: 2,402
Drives: slowly
Rep Power: 40569
2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute
Default

It's perfectly fine for the Z even hitting track curbs. Now if you had a Porsche GT3 or 4.

2011 Nismo#91 is offline   Reply With Quote
Old 01-24-2020, 09:48 AM   #17 (permalink)
Base Member
 
370Tyler's Avatar
 
Join Date: Apr 2019
Location: Winnipeg MB
Age: 23
Posts: 66
Drives: 17 370Z DBP M6
Rep Power: 38948
370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute370Tyler has a reputation beyond repute
Default

Quote:
Originally Posted by 2011 Nismo#91 View Post
It's perfectly fine for the Z even hitting track curbs. Now if you had a Porsche GT3 or 4.

sheeesh
__________________
Follow My Instagram @tyler_hennebury

370Tyler is offline   Reply With Quote
Old 01-24-2020, 08:37 PM   #18 (permalink)
Track Member
 
Join Date: Apr 2013
Location: Colorado
Posts: 642
Drives: Poor man's Porsche
Rep Power: 542
Brendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond reputeBrendan has a reputation beyond repute
Default

True types are way easier to adjust than the divorced type. There aren't any real downsides especially if you are running relatively soft street rates.

If you are building the kit yourself, know that type set-ups will need to run a much softer rate spring in the rear than if you keep the oem set-up. if you are buying a kit off the shelf, that should already be taken into account.
DarkJak and rick370blue like this.
Brendan is offline   Reply With Quote
Old 01-25-2020, 05:53 PM   #19 (permalink)
Base Member
 
Ultrakla$$ic's Avatar
 
Join Date: Jun 2019
Location: Lowsyana
Posts: 131
Drives: 2014 370z Touring A7
Rep Power: 10072
Ultrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond repute
Talking

I have the HKS HIPERMAX IV GT divorced coilovers on my 370z. Very easy install. 1st mod I did to my car.

STATIC LIFE!!



I wish I had air tho
__________________
http://www.the370z.com/signaturepics/sigpic156904_2.gif
2014 370z Sport Touring 7speed AT/QAB PEARL WHITE TRICOLOR/HKS MAX IV GT COILOVERS/VICREZ SPLITTERS/TEXAS DRIFTER SPOILER/GTR START BUTTON/AMSOIL OIL & FILTER/K&N DROP-INS

Last edited by Ultrakla$$ic; 01-25-2020 at 06:11 PM.
Ultrakla$$ic is offline   Reply With Quote
Old 02-23-2020, 09:24 PM   #20 (permalink)
Base Member
 
Girald's Avatar
 
Join Date: Jun 2017
Location: Denver
Posts: 135
Drives: 15' 370z SpTech 6MT
Rep Power: 3363
Girald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond reputeGirald has a reputation beyond repute
Default

i hate to be the skeptic, but swapping out for a spring bucket-less "true coilover" rear setup sounds like riding the fine line of potential failure.

i ask myself: how many other cars have failed doing this, and why did nissan go this route to begin with? Also, why would i want to delete my spring bucket when A: spl makes spring bucket midlinks, B:many brands make coilovers spec'ed for Zs with spring bucket configurations as standard (you have to go looking for true rears).

i understand that others have tracked their cars on true coilover setups.. but why would the designers spend more money CAD'ing in a second load point rather than reinforce the shock mount locations? it may not snap the metal, but i can imagine that it is adding a tremendous amount of stress..
__________________
AAM tt'ed // Soon: Moving back to the East Coast
Girald is offline   Reply With Quote
Old 02-23-2020, 09:59 PM   #21 (permalink)
A True Z Fanatic
 
cv129's Avatar
 
Join Date: Jul 2011
Location: Dallas, TX
Posts: 3,236
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

Coil-overs and mechanical stress?

Not agreeing or disagreeing, I think Jhill’s reply (#11) in the above thread has merit in supporting rear true type without extra reinforcement. By his explanation, if the rear bottoms up, it’s the rear shock that runs out of travel first, meaning the shock tower is still required to have the strength to bear weight and force of impact.
Rusty likes this.
__________________
Setrab | RE-71 | SPL | JRZ | Nismo | ARK | Whiteline | RacingBrake | CJM Oil Pan | Ti shield
cv129 is online now   Reply With Quote
Old 02-23-2020, 10:59 PM   #22 (permalink)
Ronin Samurai - Assassin
 
Rusty's Avatar
 
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 68
Posts: 35,219
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

Haven't seen anyone report a rear tower failure yet here on the forum. The RC Nismo, the Doren and AM Performance Z's all ran the true type.
JARblue, Hotrodz and Zezus like 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 online now   Reply With Quote
Old 02-24-2020, 09:12 AM   #23 (permalink)
A True Z Fanatic
 
scope22's Avatar
 
Join Date: Apr 2012
Location: Roswell, GA
Posts: 1,179
Drives: wife crazy
Rep Power: 55
scope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond reputescope22 has a reputation beyond repute
Default

Quote:
Originally Posted by Brendan View Post
True types are way easier to adjust than the divorced type. There aren't any real downsides especially if you are running relatively soft street rates.

If you are building the kit yourself, know that type set-ups will need to run a much softer rate spring in the rear than if you keep the oem set-up. if you are buying a kit off the shelf, that should already be taken into account.
Its my understanding that getting soft springs is the cause of the failure, if you hit something really hard and spring compresses all the way, the mounting point of the car will then take the rest of the force. I've been running fortune 500 coilovers for a while now, with stiffer springs and no issues (14k/12k) iirc.
scope22 is offline   Reply With Quote
Old 02-24-2020, 03:22 PM   #24 (permalink)
Base Member
 
Ultrakla$$ic's Avatar
 
Join Date: Jun 2019
Location: Lowsyana
Posts: 131
Drives: 2014 370z Touring A7
Rep Power: 10072
Ultrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond reputeUltrakla$$ic has a reputation beyond repute
Talking

Divorced setup = + 25RWHP!!!



True coilovers jus sayin
__________________
http://www.the370z.com/signaturepics/sigpic156904_2.gif
2014 370z Sport Touring 7speed AT/QAB PEARL WHITE TRICOLOR/HKS MAX IV GT COILOVERS/VICREZ SPLITTERS/TEXAS DRIFTER SPOILER/GTR START BUTTON/AMSOIL OIL & FILTER/K&N DROP-INS
Ultrakla$$ic is offline   Reply With Quote
Old 02-24-2020, 03:35 PM   #25 (permalink)
Ronin Samurai - Assassin
 
Rusty's Avatar
 
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 68
Posts: 35,219
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 Ultrakla$$ic View Post
Divorced setup = + 25RWHP!!!



True coilovers jus sayin
DarkJak and Ultrakla$$ic like 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 online now   Reply With Quote
Old 02-24-2020, 03:44 PM   #26 (permalink)
Ronin Samurai - Assassin
 
Rusty's Avatar
 
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 68
Posts: 35,219
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 scope22 View Post
Its my understanding that getting soft springs is the cause of the failure, if you hit something really hard and spring compresses all the way, the mounting point of the car will then take the rest of the force. I've been running fortune 500 coilovers for a while now, with stiffer springs and no issues (14k/12k) iirc.
It's a combination of spring and valving. The oem set up has to use a stronger spring then a true style because of the leverage of the oem set up. If you use the same spring rate on a true style as the oem. You're over sprung.
Hotrodz 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 online now   Reply With Quote
Old 02-25-2020, 08:40 AM   #27 (permalink)
A True Z Fanatic
 
Hotrodz's Avatar
 
Join Date: Aug 2012
Location: NW, AZ
Posts: 9,330
Drives: 10 Nissan 370z Nismo
Rep Power: 2684385
Hotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond repute
Default

Quote:
Originally Posted by Rusty View Post
It's a combination of spring and valving. The oem set up has to use a stronger spring then a true style because of the leverage of the oem set up. If you use the same spring rate on a true style as the oem. You're over sprung.
It is about wheel rate and because of where the spring located you have change the geometry so to speak and the wheel rate will be to high if you run the same springs as in a divorced setup. Ask me how I know!!! I did this with my Z and I had more offs and near offs at the track because I was way over sprung in the rear given a true setup over divorced.
Rusty and sx moneypit like this.
__________________
Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:|Fast Intentions 3" TT-TDX|SpecialtyZ/Fast Intentions 72 Row Oil Cooler|SZ 6 Puck Clutch & Flywheel|3GsCustoms|Z1|Wavetrac|Hotchkis|Whiteline |Blitz|Fortune Auto 500|Fujimura|SPL|H&R|TK|TWM|RPM Rollbar|Sparco|Next Level Performance|TrackSpec|AeroFlow Dynamics|Pioneer|
Hotrodz is offline   Reply With Quote
Old 02-26-2020, 12:03 PM   #28 (permalink)
Base Member
 
Join Date: Feb 2019
Location: NH
Posts: 9
Drives: 16 Nissan 370Z PW M6
Rep Power: 6
16nz34 is on a distinguished road
Default

Going with Fortune Auto 510's, true setup. Hyperco springs 14K front, 10K rear...my 2016 370Z is a full on track car and I have zero worries of failure. This baby has already been to WGI, VIR, LRP and many others and each have curbs that would rattle your fillings loose...no problems.
Rusty likes this.
16nz34 is offline   Reply With Quote
Old 02-26-2020, 12:35 PM   #29 (permalink)
A True Z Fanatic
 
Hotrodz's Avatar
 
Join Date: Aug 2012
Location: NW, AZ
Posts: 9,330
Drives: 10 Nissan 370z Nismo
Rep Power: 2684385
Hotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond reputeHotrodz has a reputation beyond repute
Default

Quote:
Originally Posted by 16nz34 View Post
Going with Fortune Auto 510's, true setup. Hyperco springs 14K front, 10K rear...my 2016 370Z is a full on track car and I have zero worries of failure. This baby has already been to WGI, VIR, LRP and many others and each have curbs that would rattle your fillings loose...no problems.
I don't know if you are running any aero or not as I have a 5" front splitter and a APR gt300 rear wing. I had my FA coilovers rebuilt to 510 with Hyperco 800lbs front and 350 rear springs. I still think your rear springs are too stiff. The should be closer to 7k. You find them to be more compliant going over curbing and bumpy tracks. You may struggle with oversteer if your rear springs are over sprung.

Sent from my SM-G965U using Tapatalk
Rusty likes this.
__________________
Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:|Fast Intentions 3" TT-TDX|SpecialtyZ/Fast Intentions 72 Row Oil Cooler|SZ 6 Puck Clutch & Flywheel|3GsCustoms|Z1|Wavetrac|Hotchkis|Whiteline |Blitz|Fortune Auto 500|Fujimura|SPL|H&R|TK|TWM|RPM Rollbar|Sparco|Next Level Performance|TrackSpec|AeroFlow Dynamics|Pioneer|
Hotrodz is offline   Reply With Quote
Old 02-26-2020, 02:26 PM   #30 (permalink)
Base Member
 
Join Date: Feb 2019
Location: NH
Posts: 9
Drives: 16 Nissan 370Z PW M6
Rep Power: 6
16nz34 is on a distinguished road
Default

Quote:
Originally Posted by Hotrodz View Post
I don't know if you are running any aero or not as I have a 5" front splitter and a APR gt300 rear wing. I had my FA coilovers rebuilt to 510 with Hyperco 800lbs front and 350 rear springs. I still think your rear springs are too stiff. The should be closer to 7k. You find them to be more compliant going over curbing and bumpy tracks. You may struggle with oversteer if your rear springs are over sprung.

Sent from my SM-G965U using Tapatalk
No aero at this time...I wouldn't do aero unless I had a wind tunnel to test it in and some professional input...bad or "guess" aero could make things, much, much worse than anything I can do on my own with the suspension.

The current FA 510 setup and spring rate was professionally recommended...I provided a lot of technical detail to FA and they came up with the starting spring rate...we'll see how it goes once things thaw around here...trust me, I won't be heading out onto the track with brandie new coilovers and be whaling on the car...at least not until I know how it responds and reacts.
Rusty likes this.
16nz34 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
Squeaky Noises from rear divorced springs Coilovers SPDKING Brakes & Suspension 7 06-21-2019 02:23 AM
Cant Align Rear Tire, Might Have Frame Damage? Genzen Brakes & Suspension 12 02-16-2017 08:22 PM
Rear Quarter Panel Damage black3seventy Exterior & Interior 0 09-11-2015 09:05 PM
Rear Quarter Panel Damage 2tiNMan2 Western Region 1 05-08-2015 04:43 PM
used parts to fix up a 370z (rear damage) carvalho360 Wanted 11 08-09-2010 12:09 PM


All times are GMT -5. The time now is 03:32 PM.


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