Color0's Micro RC Blog -- A technical brain dump from the mind of yours truly...
RCX 2011 Setup: Wrap-Up
Posted 06-19-2011 at 05:55 AM by color0
So over the past couple of weeks I've given as much insight as I could regarding how I set up my Mini-Z for the RCX 2011 races in Pomona, CA; as stated in the race report this was a big, but tight, low-traction track, and I participated in the Stock 80t class using spec handout motors. If you want all the details you'll have to dive into the articles themselves, but here I just wanted to make one last post to sum up everything that I put into my RCX setup from March.
The setup:
Individual points of consideration:
Wheels and tires:
And after a month of dragging everyone around, we're finally done! Next week I have a couple things to report on the differences between Stock and Mod Mini-Z racing, all while I'm learning myself how to make the transition.
The setup:
- Chassis: Kyosho Mini-Z MR03
- Body: Kyosho Porsche 911 GT1 LM
- PN Reverse Kingpin Front Suspension
- Tower bar raised 0.4mm
- PN steering knuckles, 0.4mm shims above knuckle, 1.0mm below
- PN MR03 Orange springs
- Custom spring holder: 1.6mm thick nut + 0.5mm shims under spring
- 0 preload
- 0 droop
- 0 toe
- 2deg caster
- 1deg camber arms: 1deg static camber
- 1.5mm ride height
- Atomic 19mm S6 Delrin front rim +0N
- PN X-Pattern 15 front tire, not trued
- PN FRP T-plate #5
- PN Reconfigurable Motor Pod (94mm)
- PN Tri-shock
- Side springs: 3racing AWD Black (soft)
- Side damper grease: Kyosho 15000
- Main spring: PN Red (3rd softest)
- Main rebound spring: Atomic RCP MR02 Yellow (Super hard)
- Main damper grease: Kyosho 15000
- Lightweight differential: 106t 126p PN locking spur, 6 ceramic balls
- PN 80t Stock motor: 27t 126p pinion
- 2mm ride height
- Atomic 20mm S6 Delrin rear rim +2.1W (+1.5W rim + 0.6mm shims)
- PN 6deg radial tire, not trued
- 3x2 AN0113 FET stack
- GAIN: Strong
- SPEED: Fast
- PNCH: 2
- D.BAND: Narrow
- DUMP: Over
- D.FREQ.: 1.2kHz
- NUTRAL: Mid
- VINERTIA: Off
- BAKTIM: 1
- ST.GAIN: 250
- TH.GAIN: 250
- Steering Travel: 70
- Steering Travel: L70/R70
- Steering Dual Rate: 82%
- Steering Trim: R5
- Steering Subtrim: R1
- Steering Trim Rate (step size): 2
- Steering Config: Normal (not reversed)
- Steering Punch: 0%
- Steering Curve: 0%
- Steering Quick-Response: OFF
- Steering Speed: L100%/R100%
- Throttle Trim: 0
- Throttle High Point: 60
- Throttle Brake: 45
- Throttle Subtrim: 0
- Throttle Trim Rate (step size): 10
- Throttle Config: Normal (not reversed)
- Throttle Punch: F0%/R0%
- Throttle Curve: F0%/R0%
- Throttle Quick-Response: OFF
- Throttle Speed: F100%/R100%
Individual points of consideration:
Wheels and tires:
- Tire compound/absolute grip
- Tire fit on rim
- Tire sidewall stiffness
- Tires' temperature during race
- Wheel weight
- Wheel flex
- Wheel strength
- Wheel offset
- Wheel-bearing fit, precision
- Bearings' freeness
- Nuts' thread engagement
- Obsessive tire management!
- Shaft weight
- Shaft straightness (check this after a hard hit!)
- Diff hubs weight
- Diff hubs' traction with pressure plates
- Pressure plate flatness (sanding, etc.)
- Pressure plate longevity
- Pressure plates' traction with balls
- Balls' roundness
- Balls' material (affects hardness, roundness after time)
- Spur gear weight
- Spur gear teeth (finer = faster, weaker)
- Spur gear ball hole design (circular vs pocketed (PN))
- Thrust bearing condition (replace when worn!)
- O-ring condition (replace if collapsing)
- Diff grease
- Diff tension
- Wheelbase (shorter = traction, longer = corner speed)
- Rear pod CG (higher = pivoting, lower = smoother cornering)
- Rear pod weight
- Gearing strategy (infield vs outfield advantage)
- T-plate flex
- T-plate precision
- Grub screw pivot? (Yes for precision, No for traction)
- Overall chassis weight before ballast
- Ballast positioning!
- Tweak!
- Tri-shock vs. disk damper
- Shock weight
- Shock shaft smoothness
- Side shock springs
- Spring preload (don't let them fall out!)
- Top shock spring
- Rebound spring (PN shock only)
- Spring size, weight
- Damping grease
- Side shock angles
- Tri-shock clearance to body, wheels
- Ride height
- Front suspension style (see article)
- Spring linearity/progressiveness
- Camber
- Caster
- Toe (I almost always default to 0)
- Shims under tower bar
- Shims above knuckle
- Shims below knuckle
- Preload shims/stack
- Knuckles (ride height tuning)
- Arm geometry symmetry
- Ball joint fit
- Ball material
- Ball/hinge joint lubrication
- Damping
- Battery long-term health
- False peaking
- Better-than-stock FETs
- Motor efficiency
- Ease of reversing
- KO Propo transmitter recommendations
- Linear, mellow feel
And after a month of dragging everyone around, we're finally done! Next week I have a couple things to report on the differences between Stock and Mod Mini-Z racing, all while I'm learning myself how to make the transition.
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