I'm going to decide on which coilover i want so that i can aim for that goal.
FYI, i did hours of searching on difference forums.
Once, i wanted to get a Ksport kontrol or megan track coilover (both true type), but SO MANY people are telling everyone to stay away from those junks because of underdampening(?) of the shocks. So these are out of my list now.
This true coilover is going to be time to time drifting and mostly DD. I'm the guy who cares about funtions more than than forms. My budget is under $1100.
People recommend Stance Gr+ but IMO, the rear springs have too low of stiffness. 12k/5k i believe. I want coilover that's under $1100, around 10k/10k spring rate, no chinese stuff, shock adjustability, and strong shocks that can withstand high stress. I haven't found one yet that's is in my budget. Looks like Ksport Kontrol has what i need but i've seen one person recommending and no others. I know i'm asking too much for my low budget but which coilover could satisfy my need for my budget?
Also, tell me if i'm wrong. Do stance gr+'s 12k/5k have too soft rear springs comparing to front springs? I've heard that since they are true type, rear springs add more stiffness so more like- 12k/8k. But still to me, rear seems to be too soft comparing to front to get the rear sliding.

 

Without comment on the quality of the dampers or the quality of the R&D of what your looking at, let alone even attempting to get into drift tuning. Here is the math you need to see.

To understand what is going on, you need to know how much spring makes it past the suspension to perform work.

A setup with a 560/560 spring rate that has it's rear springs in the oem location would leverage the following amount of spring rate to the wheels to perform work, which is wheel rate 265/236

Take the same setup, but change the rear to a true coilover rear setup and you will get the following wheel rates 265/560. That's right, true coilover rear setup's leverage 100% of the springs power directly to the wheel.

So, let's look at the Stance true coilover rear setup with 672/280, you will get the following wheel rates 318/280

I know your looking for something that on paper will allow more rear rotation, but just to point it out. Tein's SDF drift coilover setup for the Z uses 672/560 rates (rear springs in the oem location)
http://www.tein.com/price/nissan.html

And btw, you can work your own math on wheel rates by using the following formula.

Front spring rate x .688 x .688 = front wheel rates (.688 is the front motion rate)
Rear spring rate x .649 x .649 = rear wheel rate when spring is in oem location.
Rear spring rate = rear wheel rate on truecoilover rear setups.

 

@Gsedan35 I've seen your many knowledgeable comments while i was searching for coilovers. Thanks.
EX) let's say OEM revised rear springs have 420 rate. The wheel rate really is 176.90. So upgrading to a Gr+ would give me 103.10 more rate to the rear than the OEM? I believe most of track or drift coilovers have more than 5k rear spring rate. 280=5k seems to be not so stiff. Maybe adjusting the shock stiffness in the rear could compensate that?

I'm specifically looking for true coilovers so that i can get rid of the spring bucket.

EDIT: Too stiff of front springs rate, 12k, would cause the car to bounce on freeways....no?

 

help~~

 

At the risk of being harsh

You're evaluating $1000 coilovers for their potential under/overdampening properties?

At this price point, don't expect much, because you're not getting much....particularly if you are after a true rear coilover type.

Your money would be FAR better spent towards a quality 2 way LSD, and wait on these suspension mods until you 1. have a better understanding of what you need and 2. can afford something worth using

 

Well, to be a nit picky bastard, its probably not directly equal because the spring center line does not directly center on the contact patch/wheel center line at the ground. Maybe more like .97 to .95. But in this thread it doesn't really matter.

 

well ofc i'm not expecting much with $1000 worth coilover but something better than ksport, and jic. since this car is DD and time to time drifting(once a month at the most), suspension set up would be a good choice for be for now. i'm a college student so i can't spend $2000 on coilover.
i read the sticky that shows all the suspension spec and the OP does not recommend stance gR+ for track/drift. do monoshocks hold up much stress than twin shocks? some trackers buy tein monoflex for track use but they are twin shocks.
Can you recommend me a coilover that's under $1300?

EDIT: i just did more research and found this. Stance Coilovers - GR+ Pro SS-D. Looks like what i need. True coilover, good price and high spring rate. IIRC, the rates are 16/14. Is this too stiff for DD? i saw Z1's post saying these are good with R-compound tires on track. So i'mguessing they are pretty stiff

 

I'm going by a discussion I had with Wil (Resolute), I figured the Motorsports engineering degree he's working on made him a reliable source. His info and along with SPL's info is why I will not touch a truecoilover rear setup on this platform.

John, since I respect your Professional opinion and a quick look at the back of the car makes is so I get where your comming from.

 

Agreed, unless you're doing some serious geometry changes in back. So far I haven't found a reason to mess too much with what the Nissan engineers designed.

 

IMO, wait until you can increase your budget. Based on what you want to do and the request or dual use. I cannot recommend a under $1300 coilover.

Is 16/14 too stiff for a DD, yes. Not unless you live on a frozen lake. In the good state of Kalifornia I would not go more then 672/500 and honestly when a person asks about ride quality I'm more inclined to like 560/448. (remember, I won't run a truecoilover rear, so my rear numbers are for rear springs in the oem location).

 

then do yourself a favor and just save till you can put something in worth spending money on it. $1000 isn't through away money and there is no need for you to just toss something in there for the hell of it. There are other mods that can be done with that $1000

you didnt read anything about us endorsing Stance coilovers, they are not something we offer

 

My 2 cents....


I don't know if I would spend more than $1000 on coils I was going to abuse drifting...

But to the same point how many drift sessions will $1000 dollar coils last... conundrum.<O

 

the spring towers at the oem location are designed to hold quite a bit of shear before they fatigue. i dont know about the true coilover setup for the reason.

i went with the hks 3 sport and am not disapointed. i think i couldve gone with a bilstein setup with stiffer linear springs and maybe i would be happier, but i dont know if id notice the difference.

 

To be clear, I have mentioned in a couple of threads that the actual rate is a function of the cosine of the angle from vertical. This is a factor in any design, from struts to SLA. In the case of the rear, the shock does transmit directly to the upright but it is not truly vertical, and while I don't have the actual specs on hand that I calculated, it should be about .97 or so.

Will

 

I was searching about every thread on stance coilovers. In one of the old threads, Z1 posted that SSD is well matched with R-comp tires

 

[QUOTE=Gsedan35;8717125]IMO, wait until you can increase your budget. Based on what you want to do and the request or dual use. I cannot recommend a under $1300 coilover.

Even if i had more money to spend on the car, i wouldn't spend every bit of them on coilover. I have more stuff to buy like tires, extra rims, cooling mods, gas, living, power mods and etc. So $1300 is about how much i want to spend on lowering the car, better handling, height and dampening adjustability.

The only reason i want True coilover is that i want to get rid of the spring bucket and get traction arms for less change in alignment spec after having fun over time. Toe bolts are just stupid...

 

I think you misread or misunderstood perhaps

link?

 

I think he meant 185/60-14 Kumho V700s. Anything more traction then that and the Stance stuff falls on its face. :-)

 

What???

 

Although my 350z plays a big role in my life, i can't spend all my money on it