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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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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 08-09-2017, 05:55 PM
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great thank you.

looks like I'll be getting some smaller spurs, do any brands fit?

need to pick up the graphite axle too, just got my alum chassis and black front and side springs.

what center spring does everyone use? what oil?

black crc carpet high grip
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Old 08-09-2017, 06:21 PM
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Originally Posted by JEFFs SC10 View Post
great thank you.

looks like I'll be getting some smaller spurs, do any brands fit?

need to pick up the graphite axle too, just got my alum chassis and black front and side springs.

what center spring does everyone use? what oil?

black crc carpet high grip
I using the Kimbrough 76T on mine
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Old 08-09-2017, 06:43 PM
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Any brand will fit, as long it is using 1/8 diff balls.
I would suggest to use Xray, xenon or Axon spurs, because they are more round than the most other brands. And use pinions from axon or xenon for the same reason.
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Old 08-10-2017, 04:27 PM
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I got CRC pinions.

Thanks for the info. I want to get a smaller spur to get a little more rip.
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Old 08-10-2017, 06:57 PM
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That's not how spurs work on 1/12. Smaller spurs just move motor closer to axle which give more off power steering. . Has nothing to do with punch. You just need the right rollout for your track no matter what spur you use.
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Old 08-13-2017, 12:35 PM
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gotcha, I'm still trying to figure that out.

got the alum chassis on yesterday.

last questions I swear. What do the softer black springs in the front and back do?
what about running the black center spring?

my car has plenty of steering, dont need anymore lol
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Old 08-14-2017, 06:25 PM
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Originally Posted by JEFFs SC10 View Post
gotcha, I'm still trying to figure that out.

got the alum chassis on yesterday.

last questions I swear. What do the softer black springs in the front and back do?
what about running the black center spring?

my car has plenty of steering, dont need anymore lol
Hi Jeff,
The softer springs in the front will increase steering, Softer side springs increase the rear grip and a softer rear sping, on the shock, will increase the rear grip too.

I would suggest to start with gold front springs, silver side springs and the gold or 2.1 black shock spring. 20k in the tubes and 35wt in the shock.
On the tires you should start with purple stripes spec tires with 41 mm fronts and 41.3 rears.
I hope this gets you a good starting point.
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Old 08-16-2017, 09:18 AM
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My car has a lot of steering so I'm trying to make it easier to drive.

so I guess harder springs will make it easier to drive?
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Old 08-16-2017, 09:26 AM
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Originally Posted by JEFFs SC10 View Post
My car has a lot of steering so I'm trying to make it easier to drive.

so I guess harder springs will make it easier to drive?
I would start with the silver side springs, they are softer and therefore increase the rear grip. This will lower the front grip too.
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Old 08-16-2017, 09:39 AM
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what about the black?
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Old 08-16-2017, 10:27 AM
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You should use this setup as starting point and adjust from there:
gold front springs
silver side springs
gold or 2.1 black center spring
20k in the tubes and 35wt in the shock.
On the tires you should start with purple stripes spec tires with 41 mm fronts and 41.3 rears.
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Old 08-20-2017, 03:13 PM
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Does anyone know the reason for using a composite ball in the lower wishbone, but a steel in the upper?

Also, does anyone have any spares of the balls they could measure for me? Interested to check if they are a true 6mm OD, and what diameter is the king pin?
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Old 08-20-2017, 08:33 PM
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Originally Posted by MattW View Post
Does anyone know the reason for using a composite ball in the lower wishbone, but a steel in the upper?

Also, does anyone have any spares of the balls they could measure for me? Interested to check if they are a true 6mm OD, and what diameter is the king pin?
Steel balls are usually tighter tolerences so they often produce less unwanted play or slop. But the kingpins usually slide smoother thru a nylon ball, so they are often used in the lower arm, where the smooth sliding action is a bit more important than the tightest fit.
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Old 08-21-2017, 06:52 AM
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Originally Posted by MattW View Post
Does anyone know the reason for using a composite ball in the lower wishbone, but a steel in the upper?

Also, does anyone have any spares of the balls they could measure for me? Interested to check if they are a true 6mm OD, and what diameter is the king pin?
The steel balls are 6mm OD, plastic are 5.94mm OD, king pin is 3.01mm.

You need to be very careful installing steel (or other 6mm) balls in lower arms, the hard and graphite arms will split at the ball cup. I use Xenon coated aluminum balls, with the Xenon upper eyelet and kingpin/steering knuckle. Ream the lower arm from the bottom with a tapered reamer, and install the ball from the bottom to avoid splitting it.
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Old 08-21-2017, 12:49 PM
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Thank you for the info, that's perfect.
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