5th Gen Shocks and Springs Technical Selection

[Jetboy]

I've got a few questions if anyone knows:

1. How are the TRD Bilsteins valved? (progressive/digressive/???) Are the front and rear similar?

2. Are the Bilstein 6112 a progressive valve as it appears the 6xxx series are? Or are they a digressive design? The 5160's are digressive I believe.

3. What valve compression/rebound rates would be good for use of generic shocks if you were going to use something like a Bilstein 7xxx in the rear? Similarly what would be best for a custom front coilover shock if you custom built one?

Edit: The reason I ask is because Bilstein makes a lot of generic shocks that can be put together into a variety of configurations. For example a generic 6100 rear shock with a stem/eyelet adapter might offer a progressive rear shock valving for about the same cost as a 5100 or a 5160 if someone preferred that option. Similarly you can assemble a generic 6100 front coilover (albeit for more $) than a 6112 but you would get to choose your own spring rate and have a threaded body adjustable coilover instead of a circlip height adjustment.

 

[TotalAutomotiveLV]

Awesome setup [MENTION=51030]joneseyyy[/MENTION]! The S2 kit rides like a dream.

 

[Jasalvas]

A lot of good info here, thanks for sharing!


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[MichaelH4]

Bump

Bumping this thread because it has been very enlightening, anyone have experience with the Fox 2.0 coilover? I was thinking 6112 were the way to go for a sort of low price high performance coilover (more like upgraded performance) but it seems there are some negative reviews on this thread. The Fox 2.0's are pretty cheap at about eight hundred dollars, are progressive (I used to think degressive was better but after reading a little it seems that is not so), and I think fox is a pretty trusted brand. What do y'all think? would love to get some feedback.

 

[Gclark949]

Bumping this thread because it has been very enlightening, anyone have experience with the Fox 2.0 coilover? I was thinking 6112 were the way to go for a sort of low price high performance coilover (more like upgraded performance) but it seems there are some negative reviews on this thread. The Fox 2.0's are pretty cheap at about eight hundred dollars, are progressive (I used to think degressive was better but after reading a little it seems that is not so), and I think fox is a pretty trusted brand. What do y'all think? would love to get some feedback.

Bump and first post for me. I agree this read is very informative for anyone looking at a suspension upgrade.

I also bumped for the question on Fox 2.0. For the price, it is equivalent to Bilstein 6112 / 5600. Would love to hear feedback on these.

 

[MAST4R]

Well, good threads don't have a long life. But if this were about light bars....

Shock Surplus has a comparison between the Billstein and the Fox 2.0. The Billstein setup is, from what I gather, unapologetically digressive whereas the comparable Icon rears, for example, are linear on compression and only mildly digressive on rebound.

This explains how Billstein and Fox calculate valving numbers: What do the valving numbers mean?

The Fox 2.0 has a reputation for coming very stiff from the factory but the rears, if ordered with the reservoirs, can be re-valved on demand by some outlets, like Accutune, for free. I read a lot of people using 30/90 on the Fox 2.0 vs the factory setup being like 50/70 compression/rebound damping percentages of max for the shock. But, again, you are on your own if you want to re-do the coilovers or the 2.00IFP rear. Those seem too much hassle for the shops to revalve them for free.

The Lowdown: Bilstein 6112 vs. Fox 2.0 Performance Coilovers – Shock Surplus

I have been told by one of these vendors that lots of people mix the 6112 front with the Fox 2.0 rears. I would love to hear feedback.

I have not been able to find the valving numbers for 6112. Billstein typically lists rebound first and their typical valving seems to be 275/70 though I have no idea how to make a comparison between Billstein and Fox numbers since they are radically different, one measures forces, the other measures % of shock's capability.