z springs front/ coupe springs rear--ID reference

  #16  
Old 03-29-2008, 07:54 AM
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Originally Posted by jibnasty
I just bought some "coupe springs" from the marketplace, but they are the exact same size as my oem g35x springs. Same size; same dots (2 yellow/front; 2 yellow,1 pink/rear.) Bought them from a guy with an x...
Do they look identical or did I get screwed?
Wow, that sucks....though don't know that you're screwed just yet. How do you know they're the same size...did you take yours off your car & compare the 2 side by side?

Sorry, but I don't know the answer to your question. Good luck.

Jim
 
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Old 03-29-2008, 08:08 PM
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Originally Posted by jimmyc13
Wow, that sucks....though don't know that you're screwed just yet. How do you know they're the same size...did you take yours off your car & compare the 2 side by side?

Sorry, but I don't know the answer to your question. Good luck.

Jim
Cus my car is already lowered and I have them off...
 
  #18  
Old 03-30-2008, 07:39 AM
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So you're lowered now & they were legit?
 
  #19  
Old 03-30-2008, 04:07 PM
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Q50 Red Sport 400 RWD
2007-2008 colors for z springs

z spring section has been updated with the following:

For 350Z springs--will drop a sedan 1" on all 4 corners.
Fronts are 314 spring rate and have 1 pink dot and 1 orange dot. Coils are tighter and most have the rubber sleeve on them.(2007-2008 models have 1 white and 1 orange dot) Tech farmer mentioned some z springs front may have only 1 pink dot z front are confusing

Rears(revised,2004.5+) are 427 spring rate and have 2 red dots and 1 purple dot.
(2007-2008 models have 2 red dots and 1 blue dot)

Rears(unrevised 2003,some 2004) are 342 spring rate and have 2 red dots and 1 white dot.(1 white dot)
 
  #20  
Old 03-30-2008, 09:29 PM
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Q50 Red Sport 400 RWD
does anyone know if the change from pink/orange dots to white/orange dots in 2007-2008 indicates a change in spring rates for the fronts

please let me know.


Originally Posted by Gsedan35
here's a list:

Oem spring rates

350Z 2003/2004
Front:314 Rear:342

350Z 2004.5 to 2008
Front:314 Rear:427
 

Last edited by Texan1; 04-02-2008 at 01:03 AM.
  #21  
Old 03-31-2008, 08:05 PM
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Originally Posted by jimmyc13
So you're lowered now & they were legit?
No. My car is already lowered on h techs. I have my oem springs in my garage and I matched them up to the "coupe" springs I just bought... exactly. Same dots; same size...
 
  #22  
Old 04-01-2008, 11:24 PM
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Originally Posted by Texan1
For coupe springs: Lowers a g sedan 1/2" on all 4 corners

Fronts: 314 spring rate with 1 white dot.(1 white dot)

Rears from a coupe with OEM 19s: 427 spring rate with 2 red dots and 1 purple dot
Hi Texan1,

Are you certain the coupe sport springs (from the configuration w/OEM 19" wheels) will lower the sedan evenly all around? Based on all the posts about 350Z revised rear springs giving the sedan a "sagging" look, I thought the 2006 G35 coupe sport springs in my basement were a waste of money.

If the 427lbs-in coupe rear springs (red/red/purple) are longer than the 427lbs-in 350Z rear springs (also red/red/purple), however, the result should be a nice, even drop. Got your camera and a few springs handy? :-)

Thanks!
 
  #23  
Old 04-02-2008, 01:11 AM
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Q50 Red Sport 400 RWD
Originally Posted by DangerMouse
Hi Texan1,

Are you certain the coupe sport springs (from the configuration w/OEM 19" wheels) will lower the sedan evenly all around? Based on all the posts about 350Z revised rear springs giving the sedan a "sagging" look, I thought the 2006 G35 coupe sport springs in my basement were a waste of money.

If the 427lbs-in coupe rear springs (red/red/purple) are longer than the 427lbs-in 350Z rear springs (also red/red/purple), however, the result should be a nice, even drop. Got your camera and a few springs handy? :-)

Thanks!
for sport suspension G sedans, shocks are good, unless you run 427s, non-sport should have shocks replaced with z(f) and cpe(R) springs:

All I know is that the z springs will lower 1" front and rear (whether the rears are revised or not). If you do have revised rears--you will need to upgrade shocks. This can create a squat-down look in rear, b/c fender is cut lower in rear(which is why you run cpe springs in the rear(1/2" drop) to try and even it out.

not sure if I answered your question.
 

Last edited by Texan1; 04-02-2008 at 01:13 AM.
  #24  
Old 04-02-2008, 08:13 AM
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Originally Posted by Texan1
for sport suspension G sedans, shocks are good, unless you run 427s, non-sport should have shocks replaced with z(f) and cpe(R) springs:

All I know is that the z springs will lower 1" front and rear (whether the rears are revised or not). If you do have revised rears--you will need to upgrade shocks. This can create a squat-down look in rear, b/c fender is cut lower in rear(which is why you run cpe springs in the rear(1/2" drop) to try and even it out.

not sure if I answered your question.
Thanks Texan1, I think so. Just realized my car was not in the signature line - 2004 G35X. And please don't point me back at the 50 page poll... that's how I got confused in the first place ;-)

It sounds like the coupe sport front springs (stiffer than stock, 0.5" shorter) with the stock rear springs (355lbs-in, decent height) and upgraded rear shocks might make a decent "OEM plus" option for the X.

Thanks again
 
  #25  
Old 04-02-2008, 09:16 AM
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how do I find out which front springs have a green and a white dot ?
 
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Old 04-05-2008, 09:25 AM
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Originally Posted by 68_GT
how do I find out which front springs have a green and a white dot ?
Hi 68_GT,

I bet you have the same front springs as I do - revised (05+) G35 coupe sport springs with a spring rate of 314lbs-in. I do not have the non-sport springs to compare with, but believe they are the same length (and spring rate) as the regular coupe front springs.

Here's one reference post (OEM 19-inch wheels) -
https://g35driver.com/forums/brakes-suspension/98419-will-springs-really-ruin-your-ride.html

Dan
 
  #27  
Old 04-22-2008, 04:27 PM
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Originally Posted by Texan1
for sport suspension G sedans, shocks are good, unless you run 427s, non-sport should have shocks replaced with z(f) and cpe(R) springs:

All I know is that the z springs will lower 1" front and rear (whether the rears are revised or not). If you do have revised rears--you will need to upgrade shocks. This can create a squat-down look in rear, b/c fender is cut lower in rear(which is why you run cpe springs in the rear(1/2" drop) to try and even it out.

not sure if I answered your question.
Try mine

I have '04 G Coupe 6MT, OEM 18's (now OEM-ish NISMO LMGT4 ray's, 19's).

1. If you use rear sport springs from say a 2006 G Coupe Sport Package, OEM 19's, does this change ride height at all? Any lowering? I assume that Nissan didn't change the overall compressed length of the inboard rear spring when installed, that would spell changes to geometry, too.

2. For same, front spring rates are the same as what I have - other than some diff color dots, are they different than my 314 lbs/in OEM 2003/2004 springs?

3. If you put Z springs (314/427) onto a G Coupe (not sedan) is there any lowering? Has anyone measured the springs?

The reason I ask is with recent changes - lots more rubber (275R/245F) and upgraded sways (Hotchkis Sport Sways F/R), I may want stiffer springs in the rear, and maybe drop it not more than 1/2".

4. If you drop a 2004 V35 0.5", is this really likely to harm the stock dampers?

NISMO Springs and Dampers in the S-Tune for the V35 do this, about 1cm drop.
 
  #28  
Old 04-22-2008, 06:20 PM
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Sorry, one more to add - did the dampers change post 2004 model year on the G Coupes (2005-2007)? I recently found out that the front and rear sways were signficantly stiffer than 2003/2004 Coupes. It shows up in a % change table for Hotchkis sways, this tells me the rear was the same but the front was beefier in 06-07:

350Z & 03- 05 G35 Front
Hole 1 = 1525 lbs/in (22% Stiffer than stock)
Hole 2 = 1845 lbs/in (48% Stiffer than stock)
Hole 3 = 2270 lbs/in (82% Stiffer than stock)
Hole 4 = 2855 lbs/in (129% Stiffer than stock)

06 G35 Front
Hole 1 = 1525 lbs/in (5% Softer than stock)
Hole 2 = 1845 lbs/in (15% Stiffer than stock)
Hole 3 = 2270 lbs/in (42% Stiffer than stock)
Hole 4 = 2855 lbs/in (78% Stiffer than stock)

Rear:
Hole 1 = 520 lbs/in (80% Stiffer than stock)
Hole 2 = 655 lbs/in (125% Stiffer than stock)
Hole 3 = 840 lbs/in (185% Stiffer than stock)

Also tells you the 350Z and G Coupe share the same rear sway bar stiffness over all years, and only the 06-07 G Coupe got a bump up front.

I'm running the rear on the middle hole and it's great.


 
  #29  
Old 04-23-2008, 01:40 AM
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Q50 Red Sport 400 RWD
Originally Posted by SteveZ
Try mine

I have '04 G Coupe 6MT, OEM 18's (now OEM-ish NISMO LMGT4 ray's, 19's).

1. If you use rear sport springs from say a 2006 G Coupe Sport Package, OEM 19's, does this change ride height at all? Any lowering? I assume that Nissan didn't change the overall compressed length of the inboard rear spring when installed, that would spell changes to geometry, too.

2. For same, front spring rates are the same as what I have - other than some diff color dots, are they different than my 314 lbs/in OEM 2003/2004 springs?

3. If you put Z springs (314/427) onto a G Coupe (not sedan) is there any lowering? Has anyone measured the springs?


The reason I ask is with recent changes - lots more rubber (275R/245F) and upgraded sways (Hotchkis Sport Sways F/R), I may want stiffer springs in the rear, and maybe drop it not more than 1/2".

4. If you drop a 2004 V35 0.5", is this really likely to harm the stock dampers?

NISMO Springs and Dampers in the S-Tune for the V35 do this, about 1cm drop.
1. No change to ride height
2. Fronts did not change
3. that info is out there, but I don't recall where
4. not sure on your damper questions

*maybe someone with more skillz can help out here,
perhaps Gsedan35 here or on my350z(if his pm box is full on driver, u can contact him over there).
 

Last edited by Texan1; 04-23-2008 at 01:42 AM.
  #30  
Old 04-23-2008, 10:07 AM
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Originally Posted by Texan1
1. No change to ride height
2. Fronts did not change
3. that info is out there, but I don't recall where
4. not sure on your damper questions

*maybe someone with more skillz can help out here,
perhaps Gsedan35 here or on my350z(if his pm box is full on driver, u can contact him over there).
Thanks, if the ride height does not change then the damper question is not relevant.

If you lower the car say 1" on stock dampers, some people have stated you'll blow them out much sooner for various reasons.

No drop, no worries.

Thanks again
 

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