Have any questions?
We’ll help you select the right timing and control solution for your facility.
Autocross System
Autocross & Solo
AC4 timing for Solo I lap and Solo II point-to-point events, LED display timers, and RaceAmerica autocross timing software.
What You Get
Timing purpose built for autocross, not for timing horses
Our AC4 autocross system times up to 4 cars on course simultaneously at 0.001-second accuracy, with automatic sensor lockouts, off-course detection, and configurable maximum run time — all tuned for the realities of Solo events.
Pair the timer with our standard LED display timers on course and RA Command AutoCross on your registration laptop — a fully SCCA-compatible, PAX-indexed solo timing package.
What's In The System
Components & products
Timing Systems
Hardwired for club days, wireless for regional events, and an AC5 PC-based system for larger programs.
Model 3850B
AC4 Hardwired Autocross Timer
Autocross timing system with hardwired track cables. Ideal for club days.
View Details
Model 3850BW/BZ
AC4 Wireless Autocross Timer
Wireless autocross timing system with T-Link 3.0 technology.
View Details
Model 3855
AC5 PC-Based Autocross Timing
PC-based autocross timing — an AC5 (3855 or 4520DUax) running RA Command AutoCross with start and finish T-Links. Includes 2 T-Links, 2 sensors, 2 emitters, and T-Link-to-sensor cables. Requires RA Command AutoCross.
View Details
LED Display Timers
Standard LED displays for on-course driver visibility — 8”, 15”, and 24”.
Model 6860D / 6860DW
8" LED Display
8in digit LED display — hardwired (6860D) or wireless (6860DW). Viewable to 320ft.
View Details
Model 6650DW
15" Wireless LED Display
15in digit wireless-only LED display. Viewable to 660ft.
View Details
Model 6450DW
24" Wireless LED Display
24in digit wireless-only LED display. Viewable to 1000ft.
View Details
Autocross Software
Registration, run groups, timing, penalties, PAX indexing, live results.
Recommended Spares & Accessories
Carry case, sensors, emitters, spare batteries, desktop charger, antennas, and foam blocks.
Model 6070B
6070 Timer Carrying Case
Molded carrying case with foam inserts.
View Details
Model 5140
5140 Single Beam Track Sensor
IR track sensor with 50ft range, immune to sunlight and RF.
View Details
Model 5040
5040 Single Beam Emitter
USB-rechargeable IR beam emitter with 55–60 hour runtime.
View Details
Model 5500
5500 USB Battery Desktop Charger
Desktop charger for spare sensor and emitter batteries.
View Details
Model 4525
Extended Range Antenna Kit
External antenna kit for extended wireless T-Link range.
View Details
Sensor & Emitter Foam Blocks
Protective foam blocks for track sensors and emitters.
View Details
Ready-to-Buy
Packages for Autocross & Solo
Pre-configured bundles designed for common facility sizes and budgets. Need something different? Request a custom quote.
Package
Club Day on a Budget
AC4 hardwired system: AC4 timer, 2 sensors, 2 emitters, 2 x 100ft cables, and 12VDC power cord. Optional adds: 8" digit LED display, autocross software.
$1,778
Package
Club Day Premium
Wireless AC4: 3850 timer console, 2 T-Links, 2 sensors, 2 emitters, 2 T-Link-to-sensor cables, 12VDC power cord, and 4 protective foam blocks. Optional adds: 8" digit display, autocross software.
$3,103
Package
Club Day Premium — AC5 PC-Based + Display
RA Command AutoCross, AC5 USB wireless link, 2 T-Links, 2 sensors, 2 emitters, 2 T-Link-to-sensor cables, 4 protective foam blocks, and an 8" digit wireless display. Optional add: 15" digit display.
$6,495
Package
Pro Solo Add-On
Adds Pro Solo capability: drag tree, start beams, and RaceAmerica Pro Solo software. Optional adds: scoreboards (1 per lane), 60ft times.
$6,095
FAQ
Questions about this system
How many cars can run on course at once?
AC4 systems support up to 4 cars simultaneously. For larger programs, the AC5 PC-based system runs RA Command AutoCross with start and finish T-Links.
Is RA Command AutoCross SCCA-sanctioned?
RA Command AutoCross is built around SCCA Solo rules including run groups, PAX indexing, penalty scoring, and class structures. It's in active use at Divisional and National events.
How long does setup take?
AC4 wireless: typically 15–20 minutes. Hardwired adds cable runs (100–1000ft) depending on course length. The USB-rechargeable IR emitters run 55–60 hours on a charge.
Need something between club and national scale?
We configure autocross systems for every size of event. Tell us how many cars, what kind of venue, and what software integrations you need — we'll send a quote within one business day.