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XRAY X12 2017 1/12 Pan Car

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Old 03-17-2017, 02:50 AM   -   Wikipost
R/C Tech ForumsThread Wiki: XRAY X12 2017 1/12 Pan Car
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Last edit by: R Dodge
Welcome to the XRAY X12'17 Thread & Wikipost! Here you will find some useful info, tips and tricks as well as setups that are used by several team drivers. Many of us run the X12'17 on high bite carpet and with most US tracks going to the new black CRC carpet, most setups from here out will be developed for those high bite conditions.

Tips & Tricks:
Some racers notice slop developed in the front end over time. One method to reduce/remove this, as pointed out by some of our friends in Europe is to score the inside of the plastic front pivot ball (where the kingpin goes through) with a sharp xacto blade. Usually 4 scores at 12, 3, 6 and 9 will do. Alternative options can be found listed below.

As with any 1/12 pan car, a smooth operating suspension is critical to performance. It is recommended to polish your kingpins & hinge pins using a dremel or a drill and some sort of polish (IE Gravity polish or Mothers Aluminum polish will work). If you find that your suspension has a bind, you may look at using a reamer or drillbit to make sure the holes are clear of any flashing or debris. The only place this may happen is at the upper hingepin, which is 2mm dia.

For stock racing we usually find ourselves looking for a little more steering. One trick that some of the stock drivers have done that seems to help is lowering the graphite plate that the servo & shock mount to. To do this, you will need the 17mm standoffs from VBC and the servo mounts from the 2015 or earlier X12. Be careful that the servo mounts do not sit crooked on the plate when attaching it; a 0.2-0.5mm shim will help ensure it sits perfect on the graphite plate. Part numbers can be found below.

Option Parts to consider:
XRA371220 X12 Foam Bumper
XRA372012 Composite Front Upper Arm Mount – Right – Graphite
XRA372022 Composite Front Upper Arm Mount – Left – Graphite
XRA372113 Composite Suspension Arm Front Lower – Right – Graphite
XRA372123 Composite Suspension Arm Front Lower – Left – Graphite
XRA372177 Spring 4.75 Coils 3.6x6x0.45mm, C=2.0 - Silver (Soft) (2)
XRA372178 Spring 4.05 Coils 3.6x6x0.45mm, C=2.5 - Black (Soft) (2)
XRA373584 Side Spring C=0.6 - Silver (2)
XRA373586 Side Spring C=1.2 - Black (2)
 XRA375010 Graphite Rear Axle Shaft - highly recommended
XRA378094 Shock Spring C=2.1 – Black

Lowered Graphite Plate:
B-02-VBC5005
XRA376255-O Alu Servo Mount - Orange (2)

Front end options:
ASC4403 Kingpins, 1:12 Scale
ASC4622 Upper Arm Eyelets
ASC4626 Upper Arm Mounts/Steering Blocks
ASC4627 Front Axles
ASC8417 Pivot Balls

Aluminum Chassis:
Max.FX Aluminum Chassis
McFactory Motorsports
Reflex/RSD

Recent Setups:
Alexander Hagberg - Snowbird Nationals - Mod - High Bite
Craig Xavier - Snowbird Nationals - 17.5 - High Bite
Robbie Dodge - Snowbird Nationals - 17.5 - High Bite
Eric Anderson - ROAR Carpet Nationals - 13.5 High Bite

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Old 10-10-2016, 08:35 AM
  #61  
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Originally Posted by truggy100
yes I now

but I whant to decrease the right height

I want to run 3mm front ride height

I have 42mm diameter wheels

and put all the shims under the arm the ride height now 3,4mm

I think I need to order more ride height shims
Do you mean the long thin shims that fit underneath the lower arms like these;?


If so, remove all of them
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Old 10-10-2016, 10:09 AM
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Originally Posted by Skiddins
Do you mean the long thin shims that fit underneath the lower arms like these;?


If so, remove all of them
yes that shim I mean

I take out all the shim the ride height now 4.8mm

I change the shims on the kingpin
the 4x0.2mm and 0.5mm shim the manual say place on top off the steering block
I put them now down the steering block
Last edited by truggy100; 10-10-2016 at 11:08 AM.
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Old 10-10-2016, 12:21 PM
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Originally Posted by truggy100
yes that shim I mean

I take out all the shim the ride height now 4.8mm

I change the shims on the kingpin
the 4x0.2mm and 0.5mm shim the manual say place on top off the steering block
I put them now down the steering block
You need to ADD ride height shims in order to LOWER the ride height. Take all the ride height shims and put them back under the lower arm. You can also use washers instead of the ride height shims (the way it use to be) if you don't have enough.

Also to fine tune the ride ride height, you can put the kingpin spacers that are above the steering block and move them underneath the steering block which will lower the ride height as well.

Know that both these things affect the roll center and camber gain (kingpin shims) of the front end.
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Old 10-10-2016, 01:15 PM
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its strange if you buy a new kit and you cant adjust the ride heigt to 3mm

whit 42mm diameter front wheels
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Old 10-10-2016, 01:19 PM
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the kit is designed for smaller tires.
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Old 10-10-2016, 01:28 PM
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the manual say 43mm front tyer 0.6mm shim under the lower arm
ride height 3mm ???

but what tire diameter do you guys running front and rear
whit 13.5 turns blinky

when I go 40mm front and 41 back
what its the life time off the tire
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Old 10-10-2016, 02:22 PM
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Originally Posted by truggy100
the manual say 43mm front tyer 0.6mm shim under the lower arm
ride height 3mm ???

but what tire diameter do you guys running front and rear
whit 13.5 turns blinky

when I go 40mm front and 41 back
what its the life time off the tire
If your going by the basic setup sheet then I understand your frustration - I think it is incorrect .. 43mm/45mm tires are very large and a 2mm split between front and rear is also a lot.

The surface you race on mostly determines the size of the tires you should run. The more grip you have, the smaller the tire. More grip also lessens tire wear. It is a balance between car handling and lifetime of the tire. For club racing you might choose to use slightly larger tires, for a bigger event you might want to use smaller tires.

Bigger tires tend to 'chunk' more .. ruining the tire.

Also know that some rims are not the same diameter, for instance .. a Jaco brand front tire cut to 41mm has more foam then a CRC/BSR tire cut to the same size. The amount of foam on the tire is what we care about (it affects handling).

If club racing on carpet try 41.5 fronts and 42mm rears .. pay attention to when your car feels the best and note the tire size.

My preference for club racing:

CRC Grey Carpet - 41/42
CRC Black Carpet - 40/41
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Old 10-10-2016, 05:02 PM
  #68  
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Originally Posted by truggy100
the manual say 43mm front tyer 0.6mm shim under the lower arm
ride height 3mm ???

but what tire diameter do you guys running front and rear
whit 13.5 turns blinky

when I go 40mm front and 41 back
what its the life time off the tire
With your 42mm tyres, what is the ride height with all three colour spacers under the front arms? (that should be 1.2mm of ride height spacers)
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Old 10-10-2016, 08:05 PM
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Originally Posted by Skiddins






It's an old CRC from when I first raced 1/12
Where did u get those balance pods at,like em aloT!!!!!
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Old 10-11-2016, 12:04 AM
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Originally Posted by Skiddins
With your 42mm tyres, what is the ride height with all three colour spacers under the front arms? (that should be 1.2mm of ride height spacers)
then the reight height its 3,6mm
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Old 10-11-2016, 01:17 AM
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truggy100 just for your reference I was running 39.6mm tyres (Jaco) with over 3.3mm of ride height this weekend.
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Old 10-11-2016, 01:34 AM
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Originally Posted by X marksthespot
Where did u get those balance pods at,like em aloT!!!!!
Looks like they're IRS. I've had mine a few years.

http://www.actionmodelcentre.com/pro...?prod=IRS-3020
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Old 10-11-2016, 01:42 AM
  #73  
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Originally Posted by truggy100
then the ride height its 3,6mm
I haven't seen a team sheet with less than 3.2mm

I would suggest one of two options;
You could buy another set of ride height shims and use some of those to lower the ride height (I bought spares in case I lost any etc)
True your tyres down further to 40.6 etc like most team driver setups, which should at least get you closer.

I struggled several times at the worlds to make ride height as the fronts were getting hammered in each run.
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Old 10-11-2016, 01:48 AM
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Originally Posted by truggy100
then the reight height its 3,6mm
Couldn't you add another 0.5 and get down to 3.1mm (ish)??
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Old 10-11-2016, 01:53 AM
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thanks guys for all the advise

I put for now some extra shims under the arm

how you find whats the good tire diameter ????
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