R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

    Hide Wikipost
Old 03-17-2017, 02:50 AM   -   Wikipost
R/C Tech Forums Thread Wiki: XRAY X12 2017 1/12 Pan Car
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
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

Print Wikipost

Like Tree9Likes
Reply
 
Thread Tools Search this Thread
Old 10-10-2016, 09:35 AM   #61
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,743
Default

Quote:
Originally Posted by truggy100 View Post
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
__________________
Xray T4'18, T4'14 (Wet Car)
Xray X12 2018
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RCDisco.co.uk
Skiddins is offline   Reply With Quote
Old 10-10-2016, 11:09 AM   #62
Tech Adept
 
Join Date: Jul 2011
Posts: 110
Default

Quote:
Originally Posted by Skiddins View Post
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 12:08 PM.
truggy100 is offline   Reply With Quote
Old 10-10-2016, 01:21 PM   #63
Tech Master
 
ByteStream's Avatar
 
Join Date: Jan 2010
Location: 5280 Raceway
Posts: 1,142
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by truggy100 View Post
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.
__________________
RCAmerica | Xray | Hudy | KO Propo | Hobbywing HWNA | R1Wurks | BSR Tires
5280 Raceway - www.5280raceway.com
MILE HIGH INDOOR CHAMPS April 20-23rd 2017 @ www.milehighindoorchamps.com
ByteStream is offline   Reply With Quote
Old 10-10-2016, 02:15 PM   #64
Tech Adept
 
Join Date: Jul 2011
Posts: 110
Default

its strange if you buy a new kit and you cant adjust the ride heigt to 3mm

whit 42mm diameter front wheels
truggy100 is offline   Reply With Quote
Old 10-10-2016, 02:19 PM   #65
Tech Addict
 
silden's Avatar
R/C Tech Elite Subscriber
 
Join Date: Dec 2012
Location: Los Angeles
Posts: 677
Trader Rating: 12 (100%+)
Default

the kit is designed for smaller tires.
__________________
West Coast R/C Works
West Coast R/C Works Shapeways Store
LRP America
Ulti Tires
silden is offline   Reply With Quote
Old 10-10-2016, 02:28 PM   #66
Tech Adept
 
Join Date: Jul 2011
Posts: 110
Default

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
truggy100 is offline   Reply With Quote
Old 10-10-2016, 03:22 PM   #67
Tech Master
 
ByteStream's Avatar
 
Join Date: Jan 2010
Location: 5280 Raceway
Posts: 1,142
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by truggy100 View Post
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
__________________
RCAmerica | Xray | Hudy | KO Propo | Hobbywing HWNA | R1Wurks | BSR Tires
5280 Raceway - www.5280raceway.com
MILE HIGH INDOOR CHAMPS April 20-23rd 2017 @ www.milehighindoorchamps.com
ByteStream is offline   Reply With Quote
Old 10-10-2016, 06:02 PM   #68
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,743
Default

Quote:
Originally Posted by truggy100 View Post
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)
__________________
Xray T4'18, T4'14 (Wet Car)
Xray X12 2018
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RCDisco.co.uk
Skiddins is offline   Reply With Quote
Old 10-10-2016, 09:05 PM   #69
Tech Adept
 
Join Date: Mar 2016
Posts: 115
Default

Quote:
Originally Posted by Skiddins View Post






It's an old CRC from when I first raced 1/12
Where did u get those balance pods at,like em aloT!!!!!
X marksthespot is offline   Reply With Quote
Old 10-11-2016, 01:04 AM   #70
Tech Adept
 
Join Date: Jul 2011
Posts: 110
Default

Quote:
Originally Posted by Skiddins View Post
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
truggy100 is offline   Reply With Quote
Old 10-11-2016, 02:17 AM   #71
Tech Regular
 
antlockyer's Avatar
 
Join Date: Mar 2016
Location: South Coast of England
Posts: 250
Default

truggy100 just for your reference I was running 39.6mm tyres (Jaco) with over 3.3mm of ride height this weekend.
antlockyer is offline   Reply With Quote
Old 10-11-2016, 02:34 AM   #72
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,743
Default

Quote:
Originally Posted by X marksthespot View Post
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
__________________
Xray T4'18, T4'14 (Wet Car)
Xray X12 2018
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RCDisco.co.uk
Skiddins is offline   Reply With Quote
Old 10-11-2016, 02:42 AM   #73
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,743
Default

Quote:
Originally Posted by truggy100 View Post
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.
__________________
Xray T4'18, T4'14 (Wet Car)
Xray X12 2018
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RCDisco.co.uk
Skiddins is offline   Reply With Quote
Old 10-11-2016, 02:48 AM   #74
Tech Regular
 
Schwarta's Avatar
 
Join Date: Jun 2014
Location: Brisbane
Posts: 431
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by truggy100 View Post
then the reight height its 3,6mm
Couldn't you add another 0.5 and get down to 3.1mm (ish)??
Schwarta is offline   Reply With Quote
Old 10-11-2016, 02:53 AM   #75
Tech Adept
 
Join Date: Jul 2011
Posts: 110
Default

thanks guys for all the advise

I put for now some extra shims under the arm

how you find whats the good tire diameter ????
truggy100 is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 07:08 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net