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

[--Redwork--]

65* will be will with big lock spacers.
No way you can get that much angle from just a knuckle change.

[Motary]

Originally Posted by KA240SX808

Are those approx/ Angle numbers with Just the Knuckles?
With 6-7mm Slip on ITR Spacers?
Big 14mm Spacer + Slip on ITR Spacer?

Just curious if that 65* is straight from the Knuckle only.

I did some vectors on their stuff, also max 55 degs.

[GKTECH]

zero ackerman installed (the previous setup shown was actually the extreme steering arm)

[GKTECH]

Originally Posted by KA240SX808

Are those approx/ Angle numbers with Just the Knuckles?
With 6-7mm Slip on ITR Spacers?
Big 14mm Spacer + Slip on ITR Spacer?

Just curious if that 65* is straight from the Knuckle only.

That number is just an estimation at this point however we'll know 100% in the coming days however the estimation on the extreme steering arms is based on installation with the offset steering rack spacers.

As the knuckle is modular our steering arm options are virtually limitless

[dil han]

Thoughts on these? First set made still in testing.

Countersteer Motoring 240sx Steering Knuckles - YouTube

[PoorMans180SX]

Originally Posted by dil han

Thoughts on these? First set made still in testing.

Countersteer Motoring 240sx Steering Knuckles - YouTube

Basically a PSM Pro knuckle with less roll center correction and less development behind it. It will probably work pretty well.

[dil han]

Originally Posted by PoorMans180SX

Basically a PSM Pro knuckle with less roll center correction and less development behind it. It will probably work pretty well.

Good to hear!

[swiftmini]

Not using a jig to aid modding knuckles to that extreme is a little shonky imo :/

Ive never known anyone to do it freestyle like that

[jaysgottaredtop]

any ETA yet on the PBM cast knuckles?

haven't seen much posted on them since they posted their first test batch a while back.

[dil han]

Originally Posted by swiftmini

Not using a jig to aid modding knuckles to that extreme is a little shonky imo :/

Ive never known anyone to do it freestyle like that

A jig is to mass produce quickly and precisely. The knuckle in the video is one of the first pair. Now that each are made, a jig can be made. Also because everything is cut square and true, with proper measurements everything lines up perfect every time.

[PoorMans180SX]

Originally Posted by jaysgottaredtop

any ETA yet on the PBM cast knuckles?

haven't seen much posted on them since they posted their first test batch a while back.

Forged knuckle. They're on Matt Fields car and a few others for testing. I'm guessing they're letting them run for at least a few events each, then they'll start producing them.

Originally Posted by --Redwork--

65* will be will with big lock spacers.
No way you can get that much angle from just a knuckle change.

PSM knuckle has 62 degrees with their small spacers. It is possible without those big spacers.

[jaysgottaredtop]

excuse me, forged. lol. you know what i meant. the not-hacked-up-and-welded-back-together kind.

tell em to hurry up before i give in and buy GKTechs.

[DC Dan MAX USA]

Ya it really does not matter how careful you are in that hand cut hand weld operation no matter how carefully you measure. Matching the left and right needs to be CNC the smallest change is just a really large result. Our modded knuckle is on a CNC jig & even then its not dead nuts since there is some welding heat force on the parts despite the jig. The upcoming Forging is even more precise since the blank is getting the CNC machining directly with zero heat factor. ETA March.

[808drft]

Originally Posted by PoorMans180SX

PSM knuckle has 62 degrees with their small spacers. It is possible without those big spacers.

Id say possibly but Dan should answer it. I have their old weld on kit which is roughly 50ish* of angle (checked with alignment machine but wheel heads hit my fender before full lock and was at 47*) and my tie rods are no where near bottoming out in the rack.

[jaysgottaredtop]

Originally Posted by DC Dan MAX USA

ETA March.

word. hurry up. lol.

[GKTECH]

we've just finished our tests for static load and fatigue over 500,000 cycles on the steering arm and the hub spindle (we used a V1 prototype knuckle for the hub spindle test).

Our on screen FEA simulations were validated with the real world test data which means that we've now got sign off from our engineering firm.

Here's the V1 prototype knuckle about 60,000 cycles in to the fatigue test on the hub spindle.

[GKTECH]

P.S this means that we'll be machning up knuckles from Monday and they'll be finished in around 3 weeks time (we've got 100 sets of knuckles to machine up along with all the accessories)

[Matej]

Will all your knuckles and the knuckle adapters come with both sets of the ball joint taper inserts?
It would be nice having the option to use either S13 or S14 FLCA without having to swap ball joints.

[GKTECH]

Originally Posted by Matej

Will all your knuckles and the knuckle adapters come with both sets of the ball joint taper inserts?
It would be nice having the option to use either S13 or S14 FLCA without having to bother with swapping ball joints.

At the time of ordering you can configure the knuckles and RC bolt on kit. They come with either S13 or S14 ball joint taper inserts however you can purchase the inserts on their own for $20 if you don't want so swap ball joints when playing around with different LCA's

[GKTECH]

Fitted up with a wheel alignment

[My$800S14]

How did you align it with a tire in that condition?

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[PoorMans180SX]

Originally Posted by My$800S14

How did you align it with a tire in that condition?

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Because alignments aren't tire dependent?

[My$800S14]

Well yeah thats true, but the settings will change some when you put good tires on a car that was aligned with bad tires, I guess it was a dumb question anyway

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[Croustibat]

Originally Posted by My$800S14

Well yeah thats true, but the settings will change some when you put good tires on a car that was aligned with bad tires,

No. They are not tyre dependant, again.

Originally Posted by My$800S14

I guess it was a dumb question anyway

Yes.

Originally Posted by My$800S14

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We dont care about that.

[Giuseppe@EnjukuRacing]

Originally Posted by GKTECH

Fitted up with a wheel alignment

Hmmm.. would love to try this setup on my car.

[My$800S14]

Originally Posted by Croustibat

No. They are not tyre dependant, again.


Yes.



We dont care about that.

Thanks bro!

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[kewilso3]

Originally Posted by DC Dan MAX USA

Ya it really does not matter how careful you are in that hand cut hand weld operation no matter how carefully you measure. Matching the left and right needs to be CNC the smallest change is just a really large result. Our modded knuckle is on a CNC jig & even then its not dead nuts since there is some welding heat force on the parts despite the jig. The upcoming Forging is even more precise since the blank is getting the CNC machining directly with zero heat factor. ETA March.

I think it might have been mentioned before, but is the geometry the same as your modded knuckles? Will the price be the same $400? Will you continue to offer modded knuckles or will the forged pieces replace them? Thanks

[DC Dan MAX USA]

Geometry is the same. The price will probably be the same so therefore there is no need to continue to mod the S chassis knuckles after fresh stock arrives. Even know the product cost is the same, the expense and convenience overall is better than before because you save shipping cost in one direction and the time it takes to remove the old ones, box them up & ship them out.

[kewilso3]

Here's gktech's knuckles using the zero ackerman arms mounted to the "wrong" sides...

[jaysgottaredtop]

^ so basically you buy GKTech knuckles w/ zero ackermann arms and have the option of zero ackermann OR pbm-esque steering angle results, depending on which way you mount the arms?

...in my very science-based estimations of grainy MS Paint'd internet pictures.