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Discussion starter · #82 ·
Amazing work on this, and great to have this coming from a fellow Aussie!
Just wondering if you have received certification and ADR compliance?
I have, it will be certified as meeting or exceeding OEM and being ADR complied for modified vehicles. If you're interested, send me a PM and I'll get your phone number and we can have a chat!
 
Discussion starter · #86 ·
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Just a quick update, I'm currently driving around on the current production parts with regular inspections to make sure nothing is moving. In about a month that will close out the testing phase and I will ship all the parts that have been purchased and then they'll be generally available.

There will be a DIY video on this soon, as well as some track time for testing!
 
Discussion starter · #87 ·
What began as a DIY for myself, making my own control arms has turned into making control arms for everyone.

Below are all parts to customers getting ready to ship. I've finished the testing phase and am satisfied with the final design.

These are now for sale permanently on a made-to-order basis. Time to start the fronts!

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I am marveling at the contents of this thread. I admire the thorough engineering involved.
One tidbit that amazed me is that aluminum has no lower fatigue limit, but will, given time, fail no matter how low the loads placed on it.

That was a disappointment, as I figured "Hey, if you make a part beefy enough, then the material is not so important."

Nope.
 
Discussion starter · #89 ·
I am marveling at the contents of this thread. I admire the thorough engineering involved.
One tidbit that amazed me is that aluminum has no lower fatigue limit, but will, given time, fail no matter how low the loads placed on it.

That was a disappointment, as I figured "Hey, if you make a part beefy enough, then the material is not so important."

Nope.
It is a problem with a bunch of older supercars, like the AC/Shelby Cobras. All the chassis are work hardening and cracking and there is nothing you can do about it. You can design for infinite life with most steels though.
 
What began as a DIY for myself, making my own control arms has turned into making control arms for everyone.

Below are all parts to customers getting ready to ship. I've finished the testing phase and am satisfied with the final design.

These are now for sale permanently on a made-to-order basis. Time to start the fronts!

View attachment 149005
It just occurred to me that until I saw these, I had never seen a car with toe settings that are built directly into the control arms.

Doesn't that reduce the tendency toward bump steer, as the toe setting is traveling directly with the control arm?
 
Yes and no - it depends on the geometry. It will influence the effect of bump-camber if it is called that. However the change in radius is negligeable IMHO.

Lambertius, I see u used the Powerflex bushings. Can you give me a short review of the feel of those?

Cheers,
Michael
 
Discussion starter · #95 ·
Yes and no - it depends on the geometry. It will influence the effect of bump-camber if it is called that. However the change in radius is negligeable IMHO.

Lambertius, I see u used the Powerflex bushings. Can you give me a short review of the feel of those?

Cheers,
Michael
Honestly the factory flanblocs are almost the same as running bearings, so there is no observable difference between the different bushing types as they're all hard. I can say for certain that because of the lubrication requirements the Urethane bushings won't last as long but I couldn't tell you how long that is, but with my arms that isn't an issue because you can actually push the bushings out and replace them easily, and the Urethane bushings are 1/6th the cost.

I've got a design that accomodates sealed bearings instead of bushings and flanblocs, that is what I'm intending to run eventually, but that is a bit more effort for machining and assembly.
 
Discussion starter · #97 ·
What is a flanbloc?
It is an intermediary bushing that is partway between a solid rubber bushing and bearing. It is essentially a sleeve bushing bound inside a rubber bushing, so that it allows total free rotation on metal/metal interfaces, but the rubber interface is stationary. The idea being that you get compliance bearing and don't get any binding issues like a solid bushing. A bunch of older 911s use them, and so do a heap of Fiat group cars. Ultimately they're just a really expensive way to make something that is less compliant than a bushing and not as stiff as a bearing.
 
Discussion starter · #99 ·
This is without a doubt the biggest project I've taken on with my car. This video was a mission to film, and a huge editing effort, it is really hard to do all this in our spare time!

Next week I'll upload the engineering video (it is already filmed and editing has finished). After that, I'll look at what is involved in doing the front arms! I think I'll try and get a Kickstarter going to fund it.

 
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