Hey guys

i have few questions about my coilover

i ordered fortune auto 500 series with F-12k R-10k custom spring rate

first, i want to make best performance with the coilover, so i asked about the best heights of the coilover to fortune auto and

they replyed DEFAULT setup will make best perfomance

so i was trying to install them, but it was too low. i couldnt even fit my stock wheels with that heigts.

basically, the coilover came with lowest height so i raised up little more, now i got about 1 finger wheelgaps

but the thing is car feels like boat on wave

its too bumpy with 10clicks both of front and rear rebound systems and its 24 clicks adjustable

i dont think damper is the reason

and after that, my handling response is horrible

when i turn my steering wheel and car react like 0.5sec later (theres no way to explain perfectly)

not even sharp. its like really bad slow handling response



i got blown motormounts now, it could be a reason of the slow handling response?

i searched lots of thread about fortune auto and didnt see any bad result with it

if i have to re- setup the preload, how much mm (inch) from the tophead or bottom?

need help!

new coilover withblown suspension feelings? hell no..

what am i missing?

tire or motormount or bad coilover settings or not enough preload

what happen to my fa 500 series coilover

the main problems are baaaad hangling response, and reaaaally bumpy



baaad





EDIT:



i changed the preload setups and still bouncy
after i setted up the preload, car raised up 1 finger gap and i didnt touch the ride heigts
i expected to more stability when i setup the preload, but nothing changed
basically, car feels like bouncy when its over the bump or wavy road
its feels like springs are pushing the body of the car to the up when car goes wavy or bumpy road

imagine when you sit and bend your back and stretch your back quickly on the bed
thats how i can explain the feeling when car is running over bumpy road or wavy road

I tried full soft to full hard damper clicks, front harder and rear harder but didnt really
changed this feeling but i could feel the stiffeness of the bump
but springs were still pushing the body of the car when it rum over the bump

 

First questions in trouble shooting;

1) How did you adjust the coilover/ride height?

2) Have you completed an alignment after install and adjusting?

Also, a bad motor mount is not going to be the root of your ill handling... but it certainly doesn't help. Bad mounts typically result in a clunky feeling. Bumpy is a subjective word... compared to a factory damper/spring, anything aftermarket is going to feel (bumpy).

 

1) I compared with stock suspension and lowered little bit more and all corners are same


2) I know spring rate is pretty stiff but it feels really bumpy like a boat on wave
didn't alignment yet because will wait for about one week

thanks for reply

 

You're welcome.

1) I was more or less asking how you adjusted the coilover... because it is a fully threaded shock body (dual tube design) you are not supposed to adjust the upper most spring perch. Please advise.

2) I can almost guarantee an alignment will return the snappy turn in and handling you are accustomed to. The bumpiness however, might be something that comes with the territory of having an aftermarket (entry level) shock.

 

Hooah.. you make me comfortable sir
I'll try new alignment 1 week later or get another set of wheel and tire
and i emailed about bumpy ride quality to fortune auto
they said it could be need little bit more preload 2-3mm
So I will try it
but I don't know what you saying about dont adjust upper most spring perch
Then could you please explain how to adjust the preload
I got custom spring rate 12k 10k now

thank you!

 

Pretty sure I meant that you should not adjust the height using the upper spring perch, that is only for spring preload.
But it sounds like you only used the lower perch like you should.

 

Yes I didn't messed up with upper spring perch
I emailed about this to fortuneauto
and got pre set of prelaod
so Im going to start it from there
thanks for reply

 

Do you mean the car feels floaty? That points to damper adjustment issues. What valving did you get for the shocks? I know its common for people to order FA shocks with valving stiffer than the spring rate. For example 14k valving with a 12k spring. This might be needed to control the spring effectively.

Talk to FA about setting the ride height and preload. Have them suggest the base adjustments. The go get an alignment. After that drive it, and you may need to stiffen the adjusters as needed.

 

Yes it feels floaty and bouncy
when my car is parked, and tried to push all 4 corners
and it bounce like blown shocks

emailed to FA, they told me I had no chance to install the coilover with recommended spec but i didn't even touch the upper spring perch
just raised up because coilover already setup the lowest heights

Still having problems

 

Hmmm...

The upper spring perch should not be adjustable. The lower spring perch should be adjustable and the lower shock mount should be adjustable.

This is from the FA500 manual:

Preload Settings
Having the correct preload tension on the front shocks is imperative. Preload
tension prevents spring bind or spring noises: ¼ inch of preload (compression)
is required on the front springs. To achieve ¼ of preload measure
the springs uncompressed. Most applications use front springs that
are 7 or 6 inches long. For example after the preload is set on an 7-inch
spring, the new total length should be 6¾ inches. Rear preload should be
set snug to the spring perch, and should not exceed 1/8 of an inch.

Set the shock preload to the above , then set the ride height using the lower mount adjuster.

I don't see how more preload will cure bounciness, but I am no suspension engineer. Once the spring, ride height and alignment are good, then you can start playing with your adjustments. With your spring rate, I would stay with the recommended compression adjustment. Then I would add rebound until the floatiness goes away. If you end up maxing the adjuster, you may need to get a re-valve.