FS: Bump Steer Spacers for S12 200SX!

Techno Toy Tuning has been working with a couple of members on the board to produce a bump steer spacer (Roll Center Adjuster) for the 1984--]1988 S12 200SX chassis and they are finally done!

Get rid of that pesky bump steer on your lowered vehicle!

The alignment rings are solid milled into the unit, so they will stay firmly seated and aligned. These RCAs will NOT move or become mis-aligned, no matter how hard you drive.

Comes with all mounting hardware - four new grade 8 bolts and lock washers.

These are IN STOCK and ready to ship.

Price is $70 per pair, plus $9 shipping to anywhere in the USA or Canada.

If you would like to make an order, we accept paypal ([email removed]), cc by phone [phone removed]), money order and cashier\'s check.

E-mail us or give us a call if you would like to place an order.

Good to see they are done, I moved them to Product Advertisements.

So, I know some of you are probably gonna smack your foreheads in disgust, but what exactly will these do?

Wow u finally showed up!! I told ya we exist.

Sweeeet.

correct me if im wrong, but wont this just raise the car back up as high as these things are?  i mean, its not like its adjusting the heigh of the mounting point of the a-arm, its adjusting the angle of the a-arm by extending the length of the shock cartridge/spring?!  maybe there\'s something im not seeing here...  i think i need to go outside and have a look at my suspension and get a birds eye veiw of whats going on here.

jesus, im an idiot, please ignore that last post Tongue  LOL!!

What would the postage cost to Australia?

Al3x.

lol, its ALOT!  i mailed something over there to my GF a week or so ago and it was a tiny box of not much weight, cost me $25 via USPS (united states postal service), UPS wanted $95.  thats airmail mind you.  i imagine slow boat would be quite a bit cheaper.  try DHL.  i think they have an online quote thingy

Just phone or e-mail them for a quote.

What would the postage cost to Australia?
 
Al3x.

Regarding Postage to Australia....

We can ship to Australia and most places in the world by Global Priority Mail for $9 This works well for smaller items that weigh under 4lb\'s  (like these RCA\'s)

Am I correct that is would also correct camber issues (or at least partially) due to lowering?

i\'d like to know this too... very seriously considering these since my car is slammed and I\'d like to reduce the bump steer.

Sean

Any discount off of both Plates and Spacers!? Wink

Any discount off of both Plates and Spacers!? Wink

Hmm would you combine shipping costs for cheaper than $18? I have a 280ZX AND an S12 and well, they both use the same setups right?

Can someone explain to me how these things work?
 
Bump steer is caused by an unequal toe-curve (not your toe angle!). Toe-Curve is the angle made between your steering rack, and (in our case) the inner tie rods. For example. With the vehicle on the ground, not turning, the right and left side Tie rods make a 15* angle with the rack. When you hit a bump, you suspension SHOULD travel equal distances on both sides. so lets say it lowers the angle, making it 5*, you do the math, 10* of movement. Now, lets say left side is 15*. and right side is 17*. You hit a bump, left is now 5, right is 7. that right side Pushes/pulls (depending on location of rack, rear on S12, Toe goes IN or positive.) Theres your bump steer.
 
But why when im going straight, doesnt it pull, if theres unequal toe-curves (15/17?). Answer: Centrifigal (sp) force keeps you straight down the road.
 
Now, dont mistake me, im not shooting down your product, i just wanna know how they work.

I dont quite understand the stuff you\'re talking about with the toe curves and stuff, but here\'s an explaination of how bump steer spacers work.  

[url]http://www.technotoytuning.com/t3_site_pages/faq/#RCA[/a]

ok, the suspension geometry thing makes sense. I still dont see how they correct bump steer, but i do see how they make your suspension \"normal\".

What do these spacers do exactly with the go? I have no idea what they do.

it levels out the control arm after a car is lowered.  or at least brings it closer to level.

Wow! This is great! I start a thread and it is \"self tending\". Thank you Indecisive!  :p

I can\'t offer any discounts on camber plates and RCA\'s together, but I can combine shipping.

If you are in Australia, the cheapest I can ship is $9 per Item by Global Priority Mail Flat Rate Envelope (There is a 4lb limit). That\'s darn cheap for quick shipping all the way across the world though!

The 280ZX uses the same camber plates, but the RCA\'s are different. I do have RCA\'s for the 280ZX in stock and ready to ship. They are the same price.

Jsvob03: On the technical standpoint....First thing to remember is that \"cause\" of bumpsteer is different on different vehicles (the S12 is a McPhearson strut design with spindle attatched) On our cars outer steering tie rods are affected by the position of the lower control arm. The steering knuckle is attatched to the lower control arm, and the steering tie rod is then attatched to the steering knuckle.

Normally, the steering tie rod is at a slight downward angle as it meets the steering knuckle and goes through a gradual arc as the car hits bumps. On a lowered car, the steering tie rods are flat, and when the car hits bumps, the tie rods go through a more extreme arc or even pull the toe in.

By spacing the LCA back down, it also corrects the geometry of the steering tie rod.

You\'ve mostly got it right on your technical description of  \"toe curve\", except for the unequal toe curve while going down the road. On smooth flat pavement, there is no unequal toe curve, regardless of how low the car is. Only when you hit a bump does the toe curve cause a wheel toe \"unequally toe\", inducing bumpsteer.

But basically, that\'s just a lot of technical mumbo jumbo to explain the reasons why RCA\'s are usefull.

In laymans terms?

If your lowered car grabs and follows grooves in pavement like it has a mind of its own? or your steering wheel tries to jerk itself out of your hand over rough pavement while cornering? RCA\'s will fix your problems!

Jsvob03: On the technical standpoint....First thing to remember is that \\\"cause\\\" of bumpsteer is different on different vehicles (the S12 is a McPhearson strut design with spindle attatched) On our cars outer steering tie rods are affected by the position of the lower control arm. The steering knuckle is attatched to the lower control arm, and the steering tie rod is then attatched to the steering knuckle.
 
Normally, the steering tie rod is at a slight downward angle as it meets the steering knuckle and goes through a gradual arc as the car hits bumps. On a lowered car, the steering tie rods are flat, and when the car hits bumps, the tie rods go through a more extreme arc or even pull the toe in.
 
By spacing the LCA back down, it also corrects the geometry of the steering tie rod.
 
You\'ve mostly got it right on your technical description of \\\"toe curve\\\", except for the unequal toe curve while going down the road. On smooth flat pavement, there is no unequal toe curve, regardless of how low the car is. Only when you hit a bump does the toe curve cause a wheel toe \\\"unequally toe\\\", inducing bumpsteer.
 
But basically, that\'s just a lot of technical mumbo jumbo to explain the reasons why RCA\'s are usefull.
 
In laymans terms?
 
If your lowered car grabs and follows grooves in pavement like it has a mind of its own? or your steering wheel tries to jerk itself out of your hand over rough pavement while cornering? RCA\'s will fix your problems!

Does anyone know if the Camber will be affected when combined with the SSC springs?

SSC's are the Canuck one's rite? If so, yah, they cause camber, as does all lowering (from what I understand) and I was told that bump steer spacers would correct it if I could find them, so these should partially correct the camber problems from lowering... Right?

PeacockSSC's are the Canuck one's rite? If so, yah, they cause camber, as does all lowering (from what I understand) and I was told that bump steer spacers would correct it if I could find them, so these should partially correct the camber problems from lowering... Right?

YOU FINISHED THEM!!!!  

...and you never sent me mine!?!?    I don't even remember now are the SE and XE steering knuckles the same? I sent SE's for the prototypes???

It's been a while... Oh well.
After driving around with these on... major improvement!

 

Been a while, but are these still available for future reference?

i WOould like to order a set now if possible

E-mailed, just in case any are still available!

I,m using '87 300ZX struts. Has anyone seen bump-steer spacers for those?

For anyone else interested in these bump steer spacers. You will get a quick reply by e-mailing, I e-mailed earlier this evening and got a quick reply back. Price has gone up though it seems. $80 + $12 shipped anywhere in the world and add tax if you're in California.

I'll most likely purchase a set next weekend when I get back from Vegas.

May they fit? http://www.newoldstockmotorsports.com/prod...?products_id=49

I think the seller does not frequent this forum anymore. Your question will be answered if you email him. He frequents and makes parts for the Z guys...

That is cool to know these are still available.

Yes, i ordered tham still making them

Installed yesterday.
On my lowered car, -40mm with KYB, the control arm pushs the plate (anti-gravel?) to the disc, i need to cut this plate and grind the lower arm because it's touching the disc after all:

grinding zone in red:

Mine did that exact same thing. cut a nice little groove into the brand.  new front rotor.

grind off the red part as the above pic shows, and its ok.

Thanks mate for your reply, i thought i was the only one having trouble

How hard are these to put on???

ziggyHow hard are these to put on???

bump for gab! I bought a bunch of stuff through him for my ae86, always answered my questions, and the products are great!

I recently have a problem i tested some rims.
Stocks one are 195/60/15 with 6' wide, I've tested 195/60/15 with 7' wide, the outer tie rod touched the rims.




What i said that i noticed that the tie rod come closer on stock rims, what about your's?

edit i noticed that i have some postive camber with RCA...