Control Arms

[CorkSport]

We have been quietly working in an adjustable front control arms since 2013 for the Mazdaspeed 3. We haven't said much about it as we wanted to get some real world use and abuse to validate the design to ensure it is trouble free.

We have been road testing the arm for over 2 years now and we are confident in the design being sturdy to hold up to the abuse people can put them through.



We know there is another option on the market which is fairly expensive. Our arms would be $525 for the pair. How many people would be interested if we made a batch of them?

-Derrick

[[R]usty]

@CorkSport; Are there any other benefits beside better adjustability? (weight savings, stiffer, etc.)

[Nliiitend1]

What is the weight vs. the OEM arm?

Will you be including the rear bushing housing and bushing?

If so, will they be available without it and compatible with aftermarket parts like the Whiteline Anti-Lift Kit?

[CorkSport]

Originally Posted by Nliiitend1 What is the weight vs. the OEM arm? Will you be including the rear bushing housing and bushing? If so, will they be available without it and compatible with aftermarket parts like the Whiteline Anti-Lift Kit?

OEM Arm 10lbs
CS arm 12.2lbs

It is a complete arm with bushings and rear bracket.

To keep our test data clean we have only run the arms as they are and not tried it with the whiteline kit.

-Derrick

[swd120]

Originally Posted by CorkSport OEM Arm 10lbs CS arm 12.2lbs It is a complete arm with bushings and rear bracket. To keep our test data clean we have only run the arms as they are and not tried it with the whiteline kit. -Derrick

Poly bushings?

[Nliiitend1]

Originally Posted by CorkSport OEM Arm 10lbs CS arm 12.2lbs It is a complete arm with bushings and rear bracket. To keep our test data clean we have only run the arms as they are and not tried it with the whiteline kit. -Derrick

Do these arms share the same rear "pinion" design as the OEM arm? That is to ask - would a bushing made for OEM arm theoretically fit these arms?

[pixelNate]

Dammit, @CorkSport;, I just replaced my control arms! Will they work on Genwons or just the Pus?

[CorkSport]

Originally Posted by pixelNate Dammit, @CorkSport;, I just replaced my control arms! Will they work on Genwons or just the Pus?

That is the game plan.

Originally Posted by swd120 Poly bushings?

The arm pictured has rubber bushings. We are exploring options with poly for people who don't want the arm have any deflection.

[swd120]

Originally Posted by CorkSport The arm pictured has rubber bushings. We are exploring options with poly for people who don't want the arm have any deflection.

I'd be in if you have a poly bushing option.

[Mazdazilla6]

Does this mean you're releasing the UCA for the 6 again?

[CGilas]

That's awesome... Great for autocross... Where do I signup?

[MD1032]

How many miles would you expect that spherical to last on a street car, and how easy is it to replace once it's worn out?

[Johnny_Law]

Originally Posted by MD1032 How many miles would you expect that spherical to last on a street car, and how easy is it to replace once it's worn out?

They can last an easy 50K if you pack the boot with grease to help keep the water out. One jam nut and then just unhread it. Reverse steps and you are done.

[CorkSport]

Sorry for falling off the planet and not answering the questions. I was on vacation then spent last weekend at the tracking beating up on on parts and trying to win some races.

Originally Posted by MD1032 How many miles would you expect that spherical to last on a street car, and how easy is it to replace once it's worn out?

I don't have an answer yet as we have not worn out the set installed on the car. I will talk to the bearing manufacturer to see if I can get an expected lifespan. The bearing is easy to replace, unbolt it and put the new one in.

Originally Posted by Nliiitend1 Do these arms share the same rear "pinion" design as the OEM arm? That is to ask - would a bushing made for OEM arm theoretically fit these arms?

It is very close to the stock rear design.

Originally Posted by Cdnspeed6 No change in caster?

No

Originally Posted by Yatta So does the reduction in deflection make up for the addition of unsprung weight?

That is the plan.

Originally Posted by ualeks Extended ball joint to adjust roll center ?

I will double check with Barett, I am pretty sure there is a change with the roll center.

Originally Posted by hnda etr Need more concrete explanation of benefits of these over stock + whiteline bushings + camber plates...

I am picking this project back up. We kind of stopped doing anything with it over the last two years to waiting for the mileage to pile up and the engineer who started the project is not here anymore. I will be running back through data we have and re-check everything for min-max on camber, if they work with whitelines, etc.

Originally Posted by Johnny_Law Your design is better than the competition for the adjustability aspect. However, I would truly hope you would at least add a spherical bearing or heim joint to the front pivot point of the LCA. It is the least expensive option of the two pivot points. New STI's and EVO 10's have bearings at the LCA contact points and so should we!!!! Hell, even 70's Lambo's have them. You used heim joints on your rear camber arms (primary reason I bought them) and I have your upper strut mounts with bearings and rear toe links with heim joints. I want more heim joints! You will be selling more of these to guys that want true steering accuracy and alignment at 9/10's and up driving limits. Those guys will have no problem with a slightly harsher ride from a bearing/heim joint vs a poly bushing. Just test drive a new STI. Suspension is firm and taught like it should be and they have bearings in the lower control arms now. Tri-Point made these for the Mazda 3 track car and it didn't have half the power of what some guys are running...Please add bearings/heim joints: 2010 Mazda 3 - Tri-Point - Modified Magazine 11th Photo at the bottom of the link.

These are some badass arms.

[Cdnspeed6]

No change in caster?

[Yatta]

So does the reduction in deflection make up for the addition of unsprung weight?

[ualeks]

Extended ball joint to adjust roll center ?

[Travisms3]

I'm down for some more camber up front.

@dev; @mize13;

[dev]

Originally Posted by Travisms3 I'm down for some more camber up front. @dev; @mize13;

I'm excited. Want more info.

[hnda etr]

Need more concrete explanation of benefits of these over stock + whiteline bushings + camber plates...

Sent from my SM-N910T using Tapatalk

[Johnny_Law]

Originally Posted by CorkSport We know there is another option on the market which is fairly expensive. Our arms would be $525 for the pair. How many people would be interested if we made a batch of them? -Derrick

Your design is better than the competition for the adjustability aspect. However, I would truly hope you would at least add a spherical bearing or heim joint to the front pivot point of the LCA. It is the least expensive option of the two pivot points.

New STI's and EVO 10's have bearings at the LCA contact points and so should we!!!! Hell, even 70's Lambo's have them. You used heim joints on your rear camber arms (primary reason I bought them) and I have your upper strut mounts with bearings and rear toe links with heim joints. I want more heim joints!

You will be selling more of these to guys that want true steering accuracy and alignment at 9/10's and up driving limits. Those guys will have no problem with a slightly harsher ride from a bearing/heim joint vs a poly bushing. Just test drive a new STI. Suspension is firm and taught like it should be and they have bearings in the lower control arms now.

Tri-Point made these for the Mazda 3 track car and it didn't have half the power of what some guys are running...Please add bearings/heim joints:

http://www.superstreetonline.com/fea...-2010-mazda-3/

11th Photo at the bottom of the link.

[miata_racer]

Just bumping this...I've bought more than a few thousand worth of things from you guys in the last year (my wife says...lol) and these look interesting. I'm looking for balljoint durability and changability. I'm replacing my OEM arms this week after running at COTA last month.


So...if these are going to be significantly stronger then cool

[TjBell]

I'm having trouble with getting the rear mount off the front lower control arm,will a gear puller work in this situation?Any suggestions not involving fire.

[CorkSport]

Originally Posted by TjBell I'm having trouble with getting the rear mount off the front lower control arm,will a gear puller work in this situation?Any suggestions not involving fire.

How about fire?

-Derrick

[Code Monkey]

[WetzMS3]

[MS3Shadow]

[WetzMS3]

[Nliiitend1]

[WetzMS3]

[KiwiFlavor]

Gotta represent dem asianz