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

[GKTECH]

Originally Posted by Matej

How much angle and camber will this add? Any specific or estimated numbers?
I want to buy a set right now. Hope it comes out soon.

You should see around 65 degrees of steering lock with these however I'm unsure exactly how much camber this will add. I'll ask the question from the engineering firm and see how we go although it won't be any different to running S14 LCA's in an S13.

[GKTECH]

THEY ARE ALIVE!!

[Matej]

Originally Posted by GKTECH

You should see around 65 degrees of steering lock with these however I'm unsure exactly how much camber this will add. I'll ask the question from the engineering firm and see how we go although it won't be any different to running S14 LCA's in an S13.

Thank you sir.
Will you be making them for an S13 or S14 ball joint taper? Or both versions (hopefully)?

[GKTECH]

Originally Posted by Matej

Thank you sir.
Will you be making them for an S13 or S14 ball joint taper? Or both versions (hopefully)?

We'll make them to suit both tapers (using chromoly inserts like our knuckles)

[towlie]

You guys gonna warranty those against cracking?

[GKTECH]

Originally Posted by towlie

You guys gonna warranty those against cracking?

We'll wouldn't release them if we thought they would crack and will happily provide a lifetime warranty

[My$800S14]

Originally Posted by GKTECH

We'll wouldn't release them if we thought they would crack and will happily provide a lifetime warranty

Against manifacture defect, not stupid people defects, or driver mishaps

What size are the bolts for the tension rods, and the inner pickup for the lca's

Im pretty sure they are 14mm or 16mm and i know it was covered in here a while back, but I cant find it, I would be willing to delete this if necessary to avoid redundancy

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[GKTECH]

Originally Posted by My$800S14

Against manifacture defect, not stupid people defects, or driver mishaps

What size are the bolts for the tension rods, and the inner pickup for the lca's

Im pretty sure they are 14mm or 16mm and i know it was covered in here a while back, but I cant find it, I would be willing to delete this if necessary to avoid redundancy

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The tension rod to LCA bolts are M12x1.25 and are around 30mm's in length.

The inner LCA bolt has an M12x1.25 thread however it is 14mm's on one side (ie. one side of the bolt is wider than the nut side)

[KA240SX808]

Can't wait to see those in action.


Anyone got some updates on PBM Forged Knuckles?

[KAs14slider]

GKtech stuff looks awesome. But I would also love to know more news on the PBM forged front knuckles. I am patiently waiting for these to be released. Will definitely be ordering a set as soon as they come out. I think there are a couple cars currently running them and testing them out like matt field's s14.

[TheZ31Guy]

I need to test if some of this will work on a S130..
Can I be a beta tester?
haha I plan to try out stock s13 knuckles so I can simply use the s13 coilover system since I already have the rears in.

[My$800S14]

Originally Posted by GKTECH

The tension rod to LCA bolts are M12x1.25 and are around 30mm's in length.

The inner LCA bolt has an M12x1.25 thread however it is 14mm's on one side (ie. one side of the bolt is wider than the nut side)

Right and understood, the inner part of the lca is just like the strut fasteners for S14, as I suspected, which is very good news thank you bro, I need to know the other pickup point for the tension rod, so I can be certain what size hiem joints to order I think they are 14mm aswell, and taper down to 12mm just like the inner lca pickup point

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[My$800S14]

Ok so whats the best size hiems to use for the pickup point for the tension, and lca's? Im thinking 17 or 18mm?

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[Motary]

You need to use heimjoints after their static radial load, not bolt size
you need ones that can do atleast 60kN or 13500lbs, also this has been discusses earlier in the thread.

Good news from wisefab facebook page:

About our news: yes the FD, PD etc. legal kits are beeing made now and available from the first half of February and both for Nissan and BMW (Supra/Soarer front kit is legal allready). Nissan knuckle design will be different allready from the new stock. Also it is true that we are working on the rear kit for Nissan S chassis and preorder for this will start in the first half of march

The development of suspension parts has really gone big on these cars, only shame is the GT86 will take over the pro scene

[PoorMans180SX]

Originally Posted by Motary

You need to use heimjoints after their static radial load, not bolt size
you need ones that can do atleast 60kN or 13500lbs, also this has been discusses earlier in the thread.

Good news from wisefab facebook page:



The development of suspension parts has really gone big on these cars, only shame is the GT86 will take over the pro scene

Ahhh very nice. It'll be interesting to see what they do for the rear.

I'm about halfway through a big update for the main post on my computer, I'll be editing it soon.

[PoorMans180SX]

Looks like Trela doesn't use Driftworks knuckles...Hahahahah.

[Motary]

The amount of jacking the front suspension produces on that car is huge, must be setup for 4 wheel drifting

[PoorMans180SX]

Big update to the OP! Let me know what you guys think!

[GripTerror]

I'm a huge fan and i still don't get WHy and WHY and WHYYYYY this thread is STILL not a sticky what the hell this is the single most only reason to be on zilvia, this thread.

[Croustibat]

I think this thread should be a sticky ... on nissanroadracing.com

very good job, but i think there is a more to be said about the steering rod. There is a very informative thread about it on NRR, to avoid various bumpsteer issues (bump oversteer/understeer) they dont need to be parallel to the LCA, but they need to intersect the LCA at the same point the "KPI" line does, or something like that. Dont quote me exactly on that though, i am still working on it. If i understood correctly you can get a massive toe change on bump/rebound by spacing the steering rod connexion to the knuckle, and the adjustment to do to get a very small toe change instead is very very small.

Check "bumpsteering an S13" or something like that on NRR. Very very instructive (warning: dont read if without some anti headache drugs)

[GripTerror]

ya no kidding at least on nrr we appreciate this kind of stuff, not slam dunk stretched zilvia haha, well zilvia has changed....somewhat... but not alot

[Motary]

While Driftworks does claim to have 66 degrees of lock on their blog, but vectors tell a different story:



Great job on the front page update!

[vehicle336]

Great new front page. Answered some of my questions about roll center correction from the point of view of a road racer, not so much a drifter. Just need to start saving an ass-ton of moneh.

[TTnickdizzle]

Front page is great! But you may want to add that Garage 7 offers a bolt on lock kit for the R33/R32/Z32s double wishbone setup aswell.

Garage 7 R32/R33 Skyline Bolt In Lock Kit

[PoorMans180SX]

Originally Posted by TTnickdizzle

Front page is great! But you may want to add that Garage 7 offers a bolt on lock kit for the R33/R32/Z32s double wishbone setup aswell.

Garage 7 R32/R33 Skyline Bolt In Lock Kit

I plan on it, but their description is kinda weird and I couldn't find any good pictures of it. So I'm waiting for some more info to come out.

I need to add TDP's R-chassis lock kit too.

[derass]

great update! where did you find info on the MAX forged knuckle?

also thanks for adding tie rod lengths, ive seen that list before but s13 was missing

[PoorMans180SX]

Originally Posted by derass

great update! where did you find info on the MAX forged knuckle?

also thanks for adding tie rod lengths, ive seen that list before but s13 was missing

I've been following it on their forum, POWERED BY MAX. If you want the insider scoop on the next cool MAX product, that's where it'll be.

[My$800S14]

Originally Posted by Motary

You need to use heimjoints after their static radial load, not bolt size
you need ones that can do atleast 60kN or 13500lbs, also this has been discusses earlier in the thread.

Good news from wisefab facebook page:



The development of suspension parts has really gone big on these cars, only shame is the GT86 will take over the pro scene

Good Info thanks, I appreciate your patients, I had no idea what load ratings or anything would be needed, I was just going to go with the best size and either use cromolly or start with a standard rod end and see how well it holds up, but this is awesomely helpful thanks

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[dil han]

^^^Agreed!! Thank you for updating the thread.

[KA240SX808]

Originally Posted by GKTECH

You should see around 65 degrees of steering lock with these however I'm unsure exactly how much camber this will add. I'll ask the question from the engineering firm and see how we go although it won't be any different to running S14 LCA's in an S13.

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.