Holley DL Viewer
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Open file
Drop a .dl or .rpk file or click Open
⚙ Settings
Dark
Light
t₀
Start
Launch
Cursor
↺ Reset zoom
+
Compare
No file loaded
All
None
📈
No file loaded
Drop a Holley .dl or Racepak .rpk data log file or click Open
Scroll to pan
Drag to pan
←/→ to fine-pan, ↑/↓ to fine-zoom
Double-click to reset zoom
Shift+click to set t₀
Drag the minimap window to navigate
Scroll over the minimap to zoom
Settings
×
Move to group
Smoothing
Scale range
Auto
Manual
–
Settings
×
Default open folder
Not set
Choose folder…
Clear
Font size
90%
100% (default)
115%
130%
150%
Scales all page text and chart labels for readability
Show gridlines
Gridline interval (seconds)
e.g. 0.2 = a gridline every 0.2s. Leave blank for automatic spacing
Channel groups
+ Add group
Reset to defaults
Applies to any log you open, same as the other settings above
Channel layout
Reset layout
Clears saved channel-to-group assignments, smoothing, colors, and scale overrides (not the group list itself)