Bilstein PSS, PSS9 vsFortune Auto

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05-27-2020, 07:14 AM

#11

hatsubai

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I think only RSG sells the ones with the custom RSG valving which was developed specifically for our cars.

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05-28-2020, 06:55 PM

#12

Live Fast

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Quote:

Originally Posted by B serious

The FA also have fairly long travel shocks and are independently preload/height adjustable. That's a nice feature.

My suggestion:
Buy the FA500 series.
Valve the shocks to accept 12K F/10K R springs.
Use 10K F and 8K R springs.

FA will build them that way for you, and you'll have something customized and also further customizable right out of the box. If you ever decide you need slightly more spring, you can step up to 12/10. Or 10/10 or 11/10...or...whatever tickles your pickle.

I think 10/8 is the sweet spot for an enthusiastically driven street car with some trackabilty still left over.

I'm looking into these and considering the FA510s too. Any reason you would have them valved higher sprung then use the lower spring rates for street/track?

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05-31-2020, 06:41 AM

#13

B serious

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Quote:

Originally Posted by Live Fast

I'm looking into these and considering the FA510s too. Any reason you would have them valved higher sprung then use the lower spring rates for street/track?

In my experience, the higher valving gives you more options.

When you click the adjuster back from full stiff, you're just allowing more oil bleed path for the piston.

So if your base valving is stronger, you can click back to make it weaker. But you can't go the other way.

Of course, there's some compromise to this.. Stiffer springs need less compression damping and more rebound damping. Softer springs need the opposite.

But honestly, if the springs are "close" to your base valving, it works out well. Like...you don't want to go with like a 16K valve and a 8K spring.

But a valve capable of damping 12/10, but has 10/8 springs on it is a pretty nice setup with tons of flexibility.

Think about it like this....
Ohlins come with 10/8K springs. But people switch to 12/10K springs on their Ohlins... and the damper still works great. Because an adjustable damper works well when its over-valved slightly.

Bilstein PSS9 are over valved too.

And lots of other shocks.