What is the best suspension for improve handling and lap times?
 

I just looking for to get a suspension for my Z, I heard most people recommend Kw V3 and BC racing. I just wondering which suspension can bring the best handling for the Z. My budget is like under 3000$.

sounds like you're new

get some better tires and the requisite safety equipment.
rack up some track time
see if this is something you wanna commit to

if you really wanna track your Z

powertrix, fortune Auto as entry level coilovers
SPL FUCA + rear arms and get an alignment. watch the for sale forum for deals
some 18x10.5 or 18x11 light wheels and sticky tires
pads
lines
fluid
oil cooler

the sport brakes will be fine until you are putting out much more increased power and have appropriate level of tire to require bigger rotors/calipers

First, seat time, as 370z is well balanced car from factory.

Then, you should look into upgrading your brakes to not face any brake fade.

As suspension, you would start with alignment kit, like OptionZero suggested, with FUCA and RCL, getting more camber and better tires, you would improve your car a lot. Changing the LSD would also improve the car predictability and exit speed.

You can get swaybars next.

Those would bring the best out of the car, as the stock suspension is well balanced.

How much track time do you have and what mods have you done to the Z so far?

May be 2 weeks 1 time, my goal just want to improve the car's handling.

Thanks for replying, how about the ohilens or Kw v3 coilovers?

Thanks! It is really helpful!

Do you know some suspension build from Amuse and MCR? I watch some video from hot version and I find out that Amuse and MCR is really fast in track. But, why it is rare to find people use their coilovers?

Amuse and Zeal (MCR) coilovers are probably twice the price of KW V3's I'd guess.

Yeah, but how much performance different between them? Is that worth it?

“Improve” is a very vague word. Exactly what is it that you want to improve? What part of the tracks and what situations you find the OEM lacking?

Also, there is a diminishing return for every dollar you spend on coilovers. A $10k setup isn’t going to yield 10x “better handling” than a $1k setup.

So.....you not have a lot of track time and did nothing to the Z yet.

1. Get time behind the wheel to improve yourself first.
2. As you improve. You will find out what areas of the car needs up-graded first.
3. The first thing most do is to read this thread.

http://www.the370z.com/track-autocro...must-read.html

Do you know anything about adjusting the dampening on coilovers?
There is;
Single adjustment - one knob for both compression and rebound. $
2 way adjustable, one knob for compression, one knob for rebound. $$
3 way adjustable, on knob for low speed compression, one knob for high speed compression, one knob for rebound. $$$$
4. 4 way adjustable, high speed compression, low speed compression, high speed rebound, low speed rebound. $$$$$$$$

If you screw up on your adjustments. You WILL make the handling worse.

The other thing too is spring rates, front and rear. In a nutshell. Stiffer springs are needed for the track, which makes the car harsh on the street. Plus your dampening has to match your spring rates.

I'm giving you this info because the way you ask the question. It doesn't sound like you know too much about it and just getting you feet wet in the subject.

Best suspension??? Your budget of $3k doesn't really allow for that. While I haven't checked prices recently, I'm guessing just going full SPL for suspension bits eats up your budget and that's just not even touching the dampers and springs. For dampers and springs, the "best" you'd be looking at a few grand minimum for just a single adjust damper with custom valving and springs. Obviously spending money on suspension can turn into a money pit.

Personal opinion on anything Amuse and Zeal is it's overpriced mediocre parts. You're paying for the name more than anything else.

With all that said, Rusty hit the nail on the head. Get behind the wheel and work on the driver mod. To start with just get a decent set of tires, track capable brake pads, an oil cooler, and maybe a front sway bar. Spend your money on consumables and then only once you've started approaching the limits of the car should you go down the rabbit hole of suspension upgrades.

I had Zeal (MCR) coilovers (got them from Japan, they are reasonably priced over there if the jpy rate is low), they are pretty nice coilovers and did very well, but I got into accident and apparently they got affected by it and at the end I returned to stock, now thinking about which coilover to go for, looking at custom ones, I am looking at MCA Red and Fortune Auto 500, don't want to overspend, as I cannot rebuild the suspension, the shipping cost could reach the price of a new coilover kit.