Thread: Adjustable B13 Rear LCAs, gauging interest.

Update, in stock and ready to ship as of 07/24/13
Parts and materials are in stock to build B13,P10, or GTiR control arms...if you want a set, let me know!


Made to order Chromoly arms for the following applications are also available, please PM or email [EMAIL="javier@turbofx.net"]javier@turbofx.net[/EMAIL] for lead times.
-P10 Rear LCAs
-B13 Rear LCAs
-GTiR V1 Rear LCAs
V1 is the straight version
-GTiR V2* Rear LCAs
V2 is the curved version similar to the stock arm. *In prototype phase, still to be tested.

Original Post
Here's another possible product we have to offer. I made a custom set on my car years ago. These are "on car" adjustable lower control arms. The version you see here was fabricated from aluminum radius rods, left and right hand threaded heim joints, along with spacers for stock hardware. They could also be fabricated from chromoly or DOM radius rods. Let me know if anyone is interested and I will see what's possible $ wise

don't mind the rust from my cage plate...

Dude u have no idea how much I've been waiting for a set of these I need them pretty bad.

x2..

Progress coilover and a fuel cell?

If these are made properly, I'm very much interested in a set.
However, another forum member Viperoni has been working on bringing them to us for some time.
http://www.sr20-forum.com/603665-post186.html

I don't know the etiquette for this. Do you step on his toes? Do you do it only if he's taking too long? Do we welcome the competition as long as it's not a direct rip-off? Do you seek his blessing?

=/

FYI, the pictures that were originally posted in the thread that gave Viperoni the idea to make them came from Javier. I have a PM were he quoted them to me from last year January.

http://www.sr20-forum.com/sentra-se-r/28014-any-interest-blox-parallel-links.html

See post 25, then see post 57 were he's thinking about building them.

I will start working on the bill of materials, contacting vendors, and figuring out pricing.



Yup, Progress coil overs setup for drag racing along with a sumped stock tank w/ an A1000 which is wicked loud!





Correct, these were designed years ago. I made these when I redid all the bushings on the car to prevent any possible suspension binding. The thought of manufacturing and reselling them crossed my mind a few times, but I never really followed through until now. Anyone can make these...doesn't bother me if their is competition.

Well you have my interest. SoloSol said they were very noisy and the ends needed servicing or replacement every 6-12 months (of track usage?). I'm not sure where the noise comes from as the progress rear swaybar uses the same style links and is mostly silent. Maybe it is all the NVH coming through the chassis he's talking about?

Obviously NVH goes up with the solid connections, but the joints themselves shouldn't be making much noise at all. If you produce a product that makes minimal noise (not none), is adjustable without disassembly (reverse threads on one side with tool placement on the bar), is relatively light and strong, fits perfectly using the OEM through bolt, and has a real world service life similar to the Progress rear swaybar endlinks (5 years or so) then I'm all in.

I would guess the replacement of ends is directly related to the quality. There are rebuildable ones at the high end. Cheap steel at the bottom end and chromoly ones with grease fittings in the middle.

I built mine on the cheap, but will put the good ends on as I maintain them.

There's no rocket science in building a set of these. You could, in all honesty, make some with <$200 in parts, and a hacksaw.

Making nicely machined spacers would be the only trick for making them for others, and they're not hard, it's just that you need 16 of them and so you need to find a way to keep the per unit cost down.

I don't think there's any way to make these quiet, however. There's a lot of noise absorbency even in a polyurethane bushing.

But they do add a huge range of motion to the suspension without binding. You will run out of training arm arc before you see any bind in the rear suspension. My suspension is some very long travel hotbits gravel rally coilovers, and the parallel arms have no bind, right up to the point where the trailing arm tries to stuff the wheel into the front of the wheel well.

NVH definitely increases when rod ends are used instead of bushings. The spherical bearing provides a "direct" connection and doesn't have any of the damping characteristics of a bushing. It's not that bad though. My daily driver has a solid axle watts linked rear end using mid-level quality rods ends...it's totally streetable.



I could offer both economy, mid-level, and high end rod ends as options and they would all be interchangeable/upgradeable. If I go the aluminum route, the radius rods with LH/RH threads and knurling/wrench flats will be turned on a cnc lathe. If I go the chromoly or DOM route, the weldable inserts would be turned on a cnc lathe and then TIG'd onto rods. Either way would produce a high quality part...the only difference would be the weight and strength per dollar ratio. stronger lighter parts usually cost more.

These are the spacers I am currently using on my car along with a economy level rod end.