Primghar Figure 8

Setup at Primghar Figure 8

Primghar Figure 8 is a dirt oval in Primghar, IA. On dirt, three numbers decide your night: density altitude (shown live above), stagger and cross weight, and where the surface sits in its dry-down. Nail those and you are racing, not guessing.

Density altitude at Primghar Figure 8

As temperature, humidity and barometric pressure shift across the day near Primghar, the density altitude above moves with them — and so should your jetting and tune. racer.wiki uses uncorrected station pressure for the real number, the same math a Kestrel runs. Read the full density altitude guide →

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