The Best of 2021, #3: Resurrecting Project FR-S: Wisefab Track Suspension

We ended up cutting the offending area off of the car.  Since this is a nonstructural seam area away from the factory spot welds this isn’t an issue for strength.

Now we had clearance when the suspension is fully compressed.  Due to the higher hub location, we also had to shorten the front anti swaybar end links by an inch as well. We had an adjustable Whiteline part so it was not too bad, we chucked it in a lathe and cut 1/2 inch off of both ends.  The Wisefab suspension isn’t a total bolt-on!

We set the front suspension at 3.5 degrees negative camber, 6 degrees positive caster and 1/8 inch toe out.

With Wisefab our car was almost an inch lower but we actually gained some wheel travel over what it was.

Of course, we decided to upgrade our tires at this point.  Our old tires were hard from sitting for years and one of them had a big screw in it.  We got a set of Falken’s brand new RT660’s in 255/35-18.  Although the tires were once size smaller they were actually a bit wider than our previous 265/35-18’s.

 

The RT660 is Falken’s entry into the 200 treadwear tire wars that are currently being fought. 200 is the magic number for Time Attack and Autocross Street classes.

22 comments

  1. This sounds like a weird consideration but I wonder if that adapter for the front upright is to save costs – it looks like if that was made as part of the same machined upright, the billet would have to be an inch or two “taller” and everything but that one mount would have to get turned into chips.

    It seems like the geometry changes the Wisefab kit makes make a lot of sense but I’m with you in feeling weird about the whole idea of going down in rod end sizes, plus the skeletonized arms… I don’t know.

  2. “We hope that Wisefab might consider some of the issues we have with the kit and make some small improvements to it.”

    It looks like the current kit on sale has already improved on some of these issues. The rear lower control arm and the bent toe arm look signficantly beefier.
    About the front adapter, perhaps it’s for the guys who want to run massive offset wheels so they can attach the strut to the outer mounting points and have less radial load on the shock absorber shaft.

    1. That’s great that the parts are beefed up! I still don’t see why the adaptor is needed. The strut hits the wheel without it. Why cant the upright just be made with it incorporated into the design? One thing is that Wisefab has great customer service. Our kit was missing a few small parts and they had them in our hands in two days with one email!

      1. I do a bolt on strut mount on the Evo uprights (SSB Designs) for 2 reasons. 1, its a 3″ tall block to machine instead of a 5.5″ tall block. 2, Flexibility in offset, height, and camber. I get requests for a bunch of different flavors like a reduced ride height version for a Mirage Proto in Singapore or my Extremely long version to push the strut to the inner wall for max tire clearance.

        Single piece is fine, but there’s very little drawback in separate parts in practice.

  3. It is great that you saw even more improvements in the handling of the car- it really has been a fantastic project car (followed closely by the cayman). It is equally valuable to hear of the challenges with the installation, and the concerns over aspects of durability. Hopefully further design and component refinements are made by WiseFab- the adjustability of this setup really makes it an appealing option for any 86/BRZ that sees regular or dedicated track use.

    Regarding the bearings and the decreased self-centering of the steering- is it an issue of the small bearings binding under a load that would be distributed more evenly with a larger bearing? Do you know if they use a bearing with a low friction liner, or grooved liner designed to be used with lubrication?

    Disclaimer: I went straight to google after reading this article – the SKF bearing website had a great “principles of selection and application” section, which lead me to ask about the type of bearing, and whether that could be an issue. Prior to that search, my knowledge was limited to “yep, that is a spherical bearing (heim/rose joint)” 😀

    1. I think higher quality bearings would help and when these bearings break in. After one day at the track, it was getting much better so I think another day at the track will do it.

  4. y’all should ditch the front and make your own double wishbone setup like HKS did with their “look what we can do but we’re not gonna sell any of these parts” time attack 86.

          1. my memory has betrayed me… I was remembering a fab’d A-arm out of small diameter tubes…

          2. It is not RX8 parts, if anything they are similar to VA Impreza parts. The RX8 has upper control arms, this is McPherson strut.

          3. We’re talking about the HKS car which did a double wishbone conversion (well, added an upper arm). see youtube link Rich posted.

  5. Placing rods so the stud is in bending stress is bad engineering. It’s a common error and just makes me cringe when I see it on suspension parts.

  6. I wish the wisefab kit wasnt so $$$. Do you have any experience or knowledge regarding the quality and design of the Partshop Max kit for the FRS? It looks like it offers similar features as the wisefab.

  7. This article should be named “Hella flush done correctly”
    Just a question: why didn’t you keep the 8 degrees of caster you used to run before without wisefab kit?

    1. I have been running less caster with wider wheels and tires as of lately. I have been finding that I don’t like the weight jacking that a lot of caster causes, especially with strut cars.

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