The 1215 and 660LB were sprung forces. Meaning sprung weight x motion ratio

The sprung mass of the car is less than that per corner...around 773LB per front corner and 559LB per rear corner.

The entire car probably weighs in around 3200-3300LB. So that leaves like an average unsprung weight of ~135-159LB per corner. Seems right on. Its a double wishbone car and the wheels/tyres probably weigh like 45LB each.

Glad you're taking the dive to making your car drive better, friend. Enjoy!

Lmk whatever setup you end up with.

 

Makes a lot more sense now, the front is now ~1.45Hz and rear ~1.75Hz, hence its a great combination in comparison to Tein's originally equipped springs, obviously you have a good feel for how a suspension should feel as these frequencies are congruent with a fast road car, and can do the odd track day.

I'm going to ensure I have all my full measurements before I decide on the final spring setup, and may then eventually move on to another damper in the future, I do think I'll end up with a square setup such as 7k/7k springs eventually, or 7k/8k rear to achieve flat ride, just need to ensure I have the correct sprung weights before proceeding.

 

Right on, cousin.

Let us know how it works out for you.

If you're ever looking for an upgrade....

I will tell you that I just did a track day with my AP2 S2000 on FA500's, and they were brilliant. Highly recommended. I thought it would ride ever so badly with 14/12K rates I chose...but it rides surprisingly well. Not like...Midwest DD well, but great for a weekend car. I did just fine on the 300 mile round trip to/from the track. Stepping down to 12/10 or 10/10 springs on the same shocks would probably put it into sporty DD category.

The 510's definitely make more sense for track use, but I was more enticed with the price/value of the 500. So far, I'm really happy. If I recommend an entry level trackable coilover to anyone, the FA will be at the way top of my list.

 

Just wanted to see if you ever had any updates on this?

 

I've since sold the car.

What info are you looking for?

 

Probably astrological sign, favorite color and position, stuff like that @BROlando
Actually...
let me copy and paste this response from swedespeed...I'm ordering BC racing coils for the V70R...
I asked for an opinion and it seems like overkill. What's your opinion for a steet car? Just buy them as is valved how they come with the springs they come with?

Only posting here because it's pertinent to picking coilovers

 

I don't know shit ab Volvo's, bruv. But generally speaking, a custom valve *can* be better, as long as whomever is spec'ing it knows what they're doing.

There's probably merit to the guy's claim that the BC lacks rebound force in the low speed region.

Digressive shocks tend to be more track focused, so with a pure digressive valve, you lose street comfort since the damping curve is fatter. The shock is making more force at most of the time (think of a fat, torquey powerband on an engine dyno).

With stiffer springs, though, a digressive shock might beat you up slightly, BUT will prevent you from getting thrown around too. So...you win some comfort, you lose some comfort in different situations. The car will feel more locked down and confident...which is comforting. But dips and bumps can sometimes feel too firm.

*However*!!! Most adjustable shocks get less digressive as you click to softer settings...so...eventually, you can find comfort.

Again...these are all generalities. I know from only minor experience that off the shelf BC's don't impress in terms of ride quality. So maybe a custom digressive valve is the way to roll.

Does this mf have a shock dyno he can send you?

He recommended polyurethane bushings, which I will absolutely recommend against.

 

@BROlando when I think of you I actually do think of a fat torquey powerband so that did help.
Seriously though, you confirmed what I suspected. He's a track guy that's probably recommending something way beyond what I need.
I'll order what it comes with which a lot of people seem happy with on the skreet...and if I NEED to I'll get the swift 7kg springs to go on the front
if I'm not happy (don't think that requires revalve).

 

Cousin, my torque allows me to have the highest pulling power in my class.

What spring rates do they come with?

 

I think they are progressive 5kg if I'm not mistaken...I think the swift are 7.
I just have a feeling that slapping them on will be world class comfort compared to 150k worn out 4C shocks

 

Boy, this is America.
5KG/mm = 280LB/IN of freedom.

That seems plenty stiff for the front suspension of a Volvo....which I believe is McPherson Strut. The spring has a much greater effect in that type of setup.

You can buy Swift of Eibach springs in the ID you need with almost any spring rate you can dream of. I don't think you wanna go with a 7K up front. But again...Idk shit ab Volvo's.