RULES & RATIOS
GRAND NATIONAL RULES / LINKS UPDATED
4CYL DEMO DERBY RULES
COMMON GEAR RATIOS
Modified- 5.43 (Crate), 5.67 (Open)
Stock Car- 6.20/6.33 (350cfm), 6.50/6.66 (500cfm)
SportMod- 5.67 (Crate), 6.00/6.20 (Open)
Grand National- 6.33/6.50
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