Ballast rule

[MattB]

WCMA Tech regs state:
"1. Ballast may be added but must be securely mounted within the coachwork in such a fashion that a tool is required for removal of ballast.
2. Unless superseded by class rules, all ballast shall be solid metal such as steel, and consist of a minimum of five (5) pounds per piece. Each piece should be bolted in place with through-bolts, fender washers, and a locking-nut / system (e.g. jam-nuts, Nylock, etc.). All bolts should be grade five (5). There should be at least one 3/8" diameter, or larger bolt for every ten (10) pounds of weight (e.g. 20 pound block uses two bolts)."

SCCA Spec Miata Rules: "Each (50lb) segment of ballast shall be fastened with a minimum of two (2) one-half (1/2) inch bolts and positive lock nuts of SAE Grade 5/Metric 8.8 or better and shall utilize large diameter, load distributing washers. Alternatively, ballast may be secured using all 4 Mazda factory passenger seat mounting bolt holes."

Which rules are we following??

[Spec Volcanic]

Hi Matt,
The Spec Miata rules meets or exceeds the WCMA rules when followed correctly, so please follow Spec Miata the rules which are specific to your class.
Gary Roberts
Race Director

[majormojo]

Matt, I have a 65lb ballast (2 plates) already sized and drilled for the seat mounting holes if you're interested.