Feisty the "Family Car"

[SVTBob]

Great news ! Look forward to your feedback.

 

[Dialcaliper]

Obligatory link for the dedicated “Rally Springs” topic. I also posted some extra tips for easier install.

Custom Rally Performance Springs Post

Install Tips

 

[jivenene]

Glad to hear! I will say that when I was running the B6/Rally springs, the combination of ride height and stiffer spring rates definitely helped a lot with both ground clearance and rubbing, but also paradoxically, ride quality because I wasn’t bottoming into the front and rear bumpstops literally all the time. The stock setup engages the nose of the front bump after only 1/2” of compression and the rear bump soon after. The nose of the bumpstops are soft so they act like a spring aid for the first inch or two, but it also means that they ramp shortly after that and produce uncomfortable jolts.

If you do try the rally spring setup, I’d love to hear feedback as so far I haven’t seen anyone else try it (or at least none commenting)

Thanks for all the great and consistent feedback! I have a couple more questions!
How do you think the stock 14-16 (or 17-19 even) springs would work with the B6s? Seems like you mentioned that a few times. I'm assuming the ride height would be exactly stock height?

Second, any idea if the rear shocks that come with the B14 ST kit (labeled F4-BE3-G752) are identical to the B6 or B8 fiesta st rear shocks? After an accident, the body shop installed a B6 on the side that got hit, so now the part numbers are mismatching and I don't know if the damping rates are the same...

thanks!

 

[Dialcaliper]

Thanks for all the great and consistent feedback! I have a couple more questions!
How do you think the stock 14-16 (or 17-19 even) springs would work with the B6s? Seems like you mentioned that a few times. I'm assuming the ride height would be exactly stock height?

Second, any idea if the rear shocks that come with the B14 ST kit (labeled F4-BE3-G752) are identical to the B6 or B8 fiesta st rear shocks? After an accident, the body shop installed a B6 on the side that got hit, so now the part numbers are mismatching and I don't know if the damping rates are the same...

thanks!

The B6’s were originally designed to be stock replacement (with stock springs), so they should work fine.

The B14 rears are the same shock body, but the damping is lighter than both the B6/B8 and even the stock Ford rear dampers. I believe they have a shorter shock shaft like a B8, so that will affect droop height

Unfortunately they are not the same damping at all. Your choices are probably these:
1) Install a second B6 to match and see if you like the end result or not
2) Contact Bilstein (aftermarket in So-Cal) and let them know about the accident and ask if they’ll sell you a single rear B14. You might need to send in the wrecked B14 if the shop didn’t throw it away
3) Ask Bilstein instead if they’ll either revalve your B6 or sell you a B6/B8 revalved to the B14 damping spec. However, I believe the B14 has a shorter shock shaft similar to the B8.
4) pick a still different rear damper for both rears (maybe a KYB or Koni adjustable) and match the original damping as best you can

Testing courtesy of @Fusion Works
https://www.fiestastforum.com/threads/bilstein-science-experiment.29105/#post-482235

 

[M-Sport fan]

I believe that some of the vendors will sell you a single B6 damper.

But most likely none would sell an individual B14 damper.

 

[jivenene]

I believe that some of the vendors will sell you a single B6 damper.

But most likely none would sell an individual B14 damper.

I'll give them a call tomorrow and see what they say.
Yeah it makes sense that the shocks that come with the B14 are different than the B6, since the ride height is minimum 1" lower.

I'll probably end up buying another B6 rear and then trying out stock spring since they can be gotten for free or cheap and maintain stock height.....