This is the roll center, suspension pickup, and steering angle modification thread.

[thefro526]

GKTech, are you giving us estimated pricing in USD or AUD? It doesn't make that much of a difference at the moment, but I'd imagine a good swing for either currency could make your price jump a bit...

[GKTECH]

Originally Posted by thefro526

GKTech, are you giving us estimated pricing in USD or AUD? It doesn't make that much of a difference at the moment, but I'd imagine a good swing for either currency could make your price jump a bit...

The prices that we're giving are in AUD however the price will actually be minus 10% as you won't have to pay our sales tax (in Australia we have to include the tax in the listed price)

Ie. The introductory price for the knuckles will be $545AUD for anyone outside of Australia plus shipping

[Motary]

GKtech, you mind sharing the measurements for the steering pickup?

[GKTECH]

Originally Posted by Motary

GKtech, you mind sharing the measurements for the steering pickup?

No problem. I'll get a diagram put together to show the difference between the 3 steering arms

[TheRealSy90]

It looks like that shorter arm already has 0 ackerman but I can't tell.

[Axi$]

post it wrong

[My$800S14]

It looks a little angled inward to me, I could be wrong, so I am expecting minimal ackerman, but none the less some amount

Missile Media™2011

[GKTECH]

Originally Posted by TheRealSy90

It looks like that shorter arm already has 0 ackerman but I can't tell.

We're just putting the simulations together to show the ackerman of each but as mentioned previously, as they're modular it's very easy for us (or you) to make a new steering arm.

P.S here's a little (big) update:

They are alive! Our first S chassis production samples have been assembled (albeit I did put the brake caliper mounts on the wrong sides) but they are together.

We'll get them test fitted in the next week and then start some destructive testing.

Watch this space.

[jaysgottaredtop]

^ i have a suspicion that a few years down the road some young kid somewhere will try to assemble a used set of your knuckles, find that picture you just posted (with the caliper mounts installed backwards), get really pissy about his brakes not mounting correctly, and come whining to you for help.

i'll go ahead and put money on it.

fair warning




...also, those knuckles looks SO boss. keep up the awesome work, guys!

[JFoxx]

^^the truth ^^^

[KA240SX808]

Time to go change my pants

[GKTECH]

Originally Posted by jaysgottaredtop

^ i have a suspicion that a few years down the road some young kid somewhere will try to assemble a used set of your knuckles, find that picture you just posted (with the caliper mounts installed backwards), get really pissy about his brakes not mounting correctly, and come whining to you for help.

i'll go ahead and put money on it.

fair warning




...also, those knuckles looks SO boss. keep up the awesome work, guys!

We'll take some pro shots in the next few days and take these ones down, just waiting for the photo guy to turn up with his magic light tent and thought we'd share the quick photo I took on my phone.

Glad you like them

[ka-titties]

those look excellent. i love all the options we're getting nowadays in suspension.

[GripTerror]

GKTECH!

I just remembered something can't believe no body mentioned this by now!

Since these are machined custom knuckles! Why not use STRONGER wheel bearings?! Once that can take negative wheel offset better, abuse and power better, grip better?

I remember def talking about trying ot use some kinda nissan truck or z wheel bearings instead of the stock ones....

[NoPistons!]

Amazing knuckle as i've already told you GKTECH. Are those steel inserts pressed in for the lca pickup and damper mount? 6000 series or 7000 series? A couple weeks later and i'm still at a loss for words at the quality and value in that setup.


On another subtopic, who has had to extend their steering column after moving the rack forwards? I'm at the point where i have to now but have yet to see it mentioned.

Been working on this the past week or so after twisting my own arm on need and want..... You know how it is. Project car life....





Probably can swing a bit more out of this. LCA is stock s13 length at the moment and tension rod is also factory length. Rack is moved forward. Maybe 3mm between it and the crossmember. Nevermind the oem dampers.....

[killer240]

anyone here running the PSM rear knuckles, what is your alternative parking brake if you have one?

[Motary]

Originally Posted by NoPistons!

On another subtopic, who has had to extend their steering column after moving the rack forwards? I'm at the point where i have to now but have yet to see it mentioned.

What about using two of these:

[KA240SX808]

+ Extended Bolts?

[GKTECH]

Originally Posted by GripTerror

GKTECH!

I just remembered something can't believe no body mentioned this by now!

Since these are machined custom knuckles! Why not use STRONGER wheel bearings?! Once that can take negative wheel offset better, abuse and power better, grip better?

I remember def talking about trying ot use some kinda nissan truck or z wheel bearings instead of the stock ones....

For us to create a new spindle isn't hard, we could machine them up as a special order if there were 10 or so people interested. In Australia bearing upgrades for the S chassis aren't too common and I've never heard of any wheel bearing issues, other than old bearings wearing out. We're certainly open to options so feel free to share your thoughts

[GKTECH]

Originally Posted by NoPistons!

Amazing knuckle as i've already told you GKTECH. Are those steel inserts pressed in for the lca pickup and damper mount? 6000 series or 7000 series? A couple weeks later and i'm still at a loss for words at the quality and value in that setup.

The inserts aren't pressed in, they're a tight fit but can be removed by hand (this is intentional). The steel inserts and spindle are machined from 40CrMo

[Matej]

Originally Posted by Motary

What about using two of these:

For anyone who can weld, it should not be hard to just extend the shaft that goes between the rack and firewall.
It may also be worth a try to see if any other Nissan/Infiniti uses a longer one that could be a direct swap.

[TheRealSy90]

Finally. Been waiting for these to come out for a long time. Super beefy mode.

ã‚¹ãƒ†ã‚¢ãƒªãƒ³ã‚°ã®åˆ‡ã‚Œè§ ’up Super Steering Angle Parts - POWERED BY MAX

From Parts Shop Max's page.

" We are proud to release this very unique part! First a warning. The downside of the spherical bearing or pillowball joint is that it cant be used on OEM type strut and spring because the range of motion is 30 degrees, thats about half of the OEM tie rod range. The OEM suspension has tons of down travel which is where the tie rod needs to have a lot of droop. Some Coilovers like KW that are not full tap coilovers have a lot of droop too, like stock, but for almost everyone whose coilovers have 50% or less travel than stock suspension, this is no problem at all! This joint range of motion has nothing to do with steering angle because the tie rod joint hardly moves while pushing the knuckles steering arm, most of the joint motion is from suspension compression and droop. The limited range of motion actually allows us to beef up the skinniest part of the tie rod, its 50% thicker near the edge of the ball housing. Because S13 Spec is only 12mm thread, we only offer this in S14 spec which is M14 1.5 thread. The thread that attaches to the tie rod end is 20mm longer than stock. The thread that goes into the rack is 7mm longer then stock. We have moved the typical hex position from the middle of the rod where forces can focus on the sharp edges of the hex to bend and crack under stress to a larger 20mm DIA section near the boot retainer. The star of the show here is the precision teflon lined maintenance free spherical bearing that replaces the OEM style plastic lined joint used in every other tie rod on the market today. This allows way more joint strength and a more direct steering feel. The extended length is a perfect compliment to our FLCA and Super steering angle knuckles, but the length may need to be cut down if used with standard knuckles and lower control arms.

~ Teflon lined spherical bearing joint
~ 7mm built in rack spacer for increased steering angle
~ 7mm longer rack threads
~ 20mm longer threads on the tie rod end
~ Black electro coating with gold plated lock ring
~ CrMo rod material "

[killer240]

I believe the outer tie rod is still on the making?

[Matej]

Just ordered a pair, because I am sure they will sell out soon.

[Matej]

Is there a good 'rule of thumb' for extending the FLCA?
I want to pick up some new S13 ones and have them lengthened because my S14 ones are not as long as I would like, but at the same time I do not want them too extreme.
Also, does anyone on here provide the service?
Cheers.

[NoPistons!]

Originally Posted by Matej

For anyone who can weld, it should not be hard to just extend the shaft that goes between the rack and firewall.
It may also be worth a try to see if any other Nissan/Infiniti uses a longer one that could be a direct swap.

Exactly what i did. Cut/weld. When i did cut the thicker part of the shaft, i did note it was HOLLOW as well as fluted/splined. It's two piece. The part that fits into the u joint on the rack slips into the shaft splines. Just a thought. Maybe someone can take that and run with it. Couldn't get decent pics of what i did with my phone but i just used free scraps i had laying around and didn't think too hard about it.




Motary, as i was undoing those bolts for the bushing the 12mm started to round off before i even broke seating torque. I didn't even want to mess with fixing that....

[huffandpuff00]

I moved my rack forward 25-30mm but I didn't have to lengthen my steering shaft... The connector joint bolted up fine and haven't had any issue with it for past year.

Are some columns/shafts longer?

[mikerbike]

Originally Posted by Matej

Is there a good 'rule of thumb' for extending the FLCA?
I want to pick up some new S13 ones and have them lengthened because my S14 ones are not as long as I would like, but at the same time I do not want them too extreme.
Also, does anyone on here provide the service?
Cheers.

I don't think there's any rule of thumb. BUT, I extended mine 1.5" and now I feel like I should have just done 1".

Basically, I rubbed the frame rail a bit before. Now I have about 3/4" clearance at lock.

Where is the extra length on S14 FCAs? Inward or outward of the TC rod?

[Lutz Performance]

which side of the control are do you normally extend?
i've given up trying to get s14 lca, so just gonna pony up and buy another set of s13s and extend them. Would like to get -3 w/o using Camber plates

[IThaJokaI]

JC, you would extend after the TC rod, before the balljoint(obviously lol.)

Mikerbike, the s14 LCA is longer between the TC rod and balljoint. But the difference in length only adds around 1* more negative camber over what you would have had with s13 LCAs.