Private Tool
NASCAR DFS Sim Engine Race model: UNCALIBRATED
Upload a cleaned race_entries CSV, choose a strategy, generate lineups, review exposure, and export for DraftKings. Iowa exports stay locked as untrusted until historical calibration evidence is reviewed.
DFS Tools Select Race Select Race Final Portfolio Size 1 lineup 3 lineups 20 lineups (20-max) 50 lineups 150 lineups (150-max contests only) This is the final portfolio target sent to DraftKings — not the options/candidate pool. Sim Candidate / Options Pool 150 options 1000 candidates 3000 candidates 5000 candidates (default) 7500 candidates 10000 candidates 15000 candidates 20000 candidates Options generated and GPP-scored before portfolio selection. Race Simulation Iterations 1000 (debug) 5000 (normal) 10000 (high accuracy) 15000 Race Sim Seed (optional, reproducible) Simulator Randomness (20% requested, 10% effective Cash) Cash / Double-Up / H2H: clamped to 5-10% regardless of slider, for safer builds. Strategy Preset Balanced Superspeedway / Drafting Intermediate / Dominator Short Track / Position Road Course / Place Diff Manufacturer Stack Contest Type Single Entry 3-Max 20 Max 150 Max Mega Field Contest Field Size Small Field Medium Field Large Field Massive Field Contest Profile (Build) Cash Double Up Head-to-Head Small Field GPP Large Field GPP Weather Variance Normal Medium Weather Risk High Weather Risk Rain Shortened Risk Lineup Uniqueness Normal Moderate High Uniqueness Upload CSV Raw DK salary CSV or cleaned race_entries CSV. Qualifying Results Upload CSV columns: race_key, driver_name, car_number, qualifying_position, qualifying_time, qualifying_speed.
Race Profile: Superspeedway (engine: superspeedway · key: talladega-2026-spring)
No CSV loaded yet.
Drivers Parsed 0
Average Salary -
Lineups Built 0
Weather Race Key: Select a race
Fetch Weather Data Default max driver exposure % (sim portfolio) Faded driver max exposure % (sim portfolio) Max captain exposure % (sim portfolio) Enable Pair Diversity Logic Only applies to Small / Large Field GPP profiles Prefer Leverage Only applies to Small / Large Field GPP profiles
Generate Lineups Generate From Sims Reset to Engine Values Download Final DK Portfolio Download Ranked Options Report