hey bozo thanks again. I think i'm just gonna go with the g35 h techs. I really don't want the car any lower than it is. Austin, tx has some nasty streets at times. damn pot holes!

 

Anytime, Marine!

Glad to share the info, as did lots of other cats did for me. And make no mistake about it, I ain't typin all that sh............stuff. Just simple copy/pasting, dude.

Not to mention, with me going just .2 (front) and .4 (rear) lower than you will, my S. Florida roads aint much better.

But what I wanna KNOW from you when you do yours is.......How does the ride/handling feel?

Once I got off Tanabe kick - they seemed ideal - I considered those springs also, i.e., the minimal drop was OK.

However, when I saw the spring rate going down to 263 lb./inch, it just seemed too low or too soft, or however you term it.

Still, I could be flat wrong, and not know what the hell I'm talkin about; a super-technical car guy I am NOT.......no offense to me.

Nor had I ever heard any adverse reports regarding those rates in the upper 200s. I suppose they're fine; just a matter of me being to damn chicken.

BMW, known for their firm yet compliant rides (even on M3s), routinely had rates in the upper 300s/low 4s.

That said, if I wanted a 3-series four years ago, I would gotten a 328-335i. Still want one, but it'll likely be an M3.

Our glorified 350/370Z 2+2s are just fine.

Rock on, brother....... ....BANG OUT!!

 

Which ones? the DF210s? Thought about the GFs for a stiffer spring(just looked it up and it's offered in the 03-06 sedan only. I've tried the nf210s before and those were pretty good.
http://www.tanabe-usa.com/gf210.asp?id=3

 

Yo FM,

It was the DF210s for G35 Coupe, where the front drop was just over what the manufacture states will allow for re-aligment w/no camber kit (.8").

And at the bottom you see some of the comparisons I was making for different springs, rates, stiffness transfer, etc.

Took a little while to figure it all out, i.e., to find the one I thought was (overall) the most balanced, but it was worth the time.

I'm a happy camper, though - like you said - there are other good choices:

Tanabe NF210 Lowering Springs (TNF073)
Infiniti 03-07 G35 (Coupe, V35)
Part #: TANABE-TNF073-001

Description:
•Normal Feeling SUSTEC NF210. Normal Feeling is for those who wish to lower their vehicle, while maintaining the comfort of the stock suspension.
•High Quality. The ultra light-weight, ultra durable, ultra precise 210 series springs are created through Tanabe`s newly developed shot-peen technology and state-of-the art German machinery.
•Spring Rate: Front (5.3kg/mm), Rear (6.0kg/mm)
•Avg. Lower: Front (1.0"), Rear (0.6")
•*Price is for a set of 4 springs
Overview

Tanabe NF210 Lowering Springs:
The Tanabe NF210 coil spring features a tasteful drop, and produces the best overall ride quality and comfort for a performance lowering spring. The lowered stance of the NF210 gives the car an elegant pose, while the spring rates, which are only slightly raised (up to 5% over stock) retain factory ride quality settings. This coil spring is extremely popular with luxury tuned vehicles, as well as those with larger diameter wheels that want to eliminate fender gap, but maintain excellent drivability while reducing the risk of damage to wheels that is associated with stiffer suspensions. Comfort especially important on daily driven vehicles, and their passengers. The Tanabe NF210 provides the best driving experience for all types of roads.
________________________________________

Lowering Good
Comfort Excellent
Performance Good

*************

Gsedan35
10-17-2005, 01:54 PM
The sport suspension on the G35 coupe which is only on 2005 coupe's delivered with OEM 19's, is as follow's.

Same ride height as regular coupe suspension (as measured on the lot, regular coupes vs coupes with the 2005 sport suspension)

Same spring rates in front (314lbs)

24% rear spring rate increase (342lbs to 427lbs)

Stiffer shocks

Infiniti tells us the sway bars are stiffer, though we don't know exactly what was done.

I have reason to believe that the front bar is different via thicker hollow walls, likely featuring about 20% greater stiffness. I do not believe that the suspension has a rear bar that is any different than the regular coupe’s suspension.

All coupe production, REGARDLESS of build year delivered with OEM 17's or 18's has the regular coupe suspension.

People get confused and think they too have a sport suspension.

Reality is any coupe that did not come with OEM 19's, has a "sport tuned" suspension meaning the regular coupe suspension.

When making lowering spring choices for the coupe, be very mindful that most aftermarket offerings are not geared towards maintaining performance, they are a compromise to lower the car and work as best as possible with the regular coupe shocks.

If you don't want that compromise, some 350Z based springs are a vastly superior choice.


***************************************

The H-Tech use spring rates that are softer than OEM and transfer a large amount of roll stiffness to the front, meaning they will increase understeer.

Tein H-tech for G35 Sedan (SKP14-BUB00)
F/R Progressive - spring rates listed rates are final rates
324/263
F drop –1.4”
R drop –0.7”
Tein H-tech for G35 Sedan front to rear spring rate balance vs. OEM balance
-7% front / -35% rear (28% transfer to front)

Here is a bunch of spring rate, sway bar, coilover etc. info I copied a while back from a post by Gsedan35 worthy of reposting:

Quote:
Stock Coupe 6MT Spring rates are the same rate as the 350Z spring and the sedan with the sport suspension.

314/342……..Rear – 427 with Sport-Tuned Suspension Package. -

Here are the spring rates in comparision to all known lowering spring/coilover product made for the Z33/CPV35/V35. If a product is not listed, that maker refused to give out the info.

Eibach's as noted (first number is the softer initial rate, followed by the higher final rate)
350Z 296/384 front 316/421 rear
G35c 229/337 front 274/463 rear
G35s 259/334 front 359/413 rear

RSR 350Z springs (just a wee bit progressive F&R, maybe one coil is progressive)
345/417 F+10% R+22%
Transfers +12% roll stiffness to rear

RSR G35 coupe springs (progressive front and rear)
315/315 F+0 R-8%
Transfers +8% roll stiffness to front

Hotchkis 350Z springs (linear springs)
340/330 F+8% R-3%
Transfers +12% roll stiffness to front

Tein S-tech 350z (fronts are progressive, rears are linear)
386/402 F+23% R+16%
Transfers +7% roll stiffness to front

Tein H-tech 350z (fronts are progressive, rears are linear)
358/375 F+14% R+11%
Transfers +3% roll stiffness to front

Tein H-tech G35 coupe & sedan(fronts are progressive, rears are linear)
324/260 F+ 5% R-22%
Transfers +27% roll stiffness to front

Tein S-tech G35 coupe & sedan (fronts are progressive, rears are linear)
358/274 R+14% R-18%
Transfers +32% roll stiffness to front

Tanabe GF210 Series 350Z
336/375 F+7% R+10%
Transfers +3% roll stiffness to rear

Tanabe NF210 Series 350Z
314/353 F+0 R+3%
Transfers +3% roll stiffness to rear

Tanabe NF210 Springs G35 COUPE
297/336 F-5% R-2%
Transfers +3% roll stiffness to front

Tanabe DF210 Springs G35 COUPE
308/353 F-2% R+3%
Transfers +5% roll stiffness to front

Tanabe NF210 Springs G35 SEDAN
297/269 F-5% R-21%
Transfers 17% roll stiffness to front

Tanabe DF210 Springs G35 SEDAN
286/280 F-9% R-18%
Transfers +9 roll stiffness to rear

As you might notice, the Tein H-Techs for the 350Z add the least amount of additional understeer (w/o adding to oversteer) keep the springs rates closest to stock, allow a 0.8" drop in the front and a 0.7" drop in the back for a G35 coupe and a drop of 0.3" in the front and 0.2" drop in the back for a 350Z. They also should not wear out the stock shocks too fast as the spring rates are mildly more stiff than stock, yet you get a nice subtile drop. By adding to a coupe, you should stay within the stock camber and toe ranges, thus not having to add camber/control arms and toe bolts.

When calculating drop for a sedan, you can use the drop of a coupe +7/8". IIRC, 7/8" is the diff between the spring height of G coupe and sedan but I'm sure someone will correrct me if I'm wrong.
__________________

 

holy crap, so the Tein H-techs are actually softer than OEM and increases understeer? no dice!