WCMA Forum

Road Racing => Race Discussion Board => Topic started by: MattB on May 16, 2018, 03:48:36 PM

Title: Ballast rule
Post by: MattB on May 16, 2018, 03:48:36 PM
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 Unless superseded by class rules, all ballast shall be solid metal such as steel, and consist of a minimum of five (5) pounds per piece.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??

Title: Re: Ballast rule
Post by: Spec Volcanic on May 17, 2018, 07:34:54 AM
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
Title: Re: Ballast rule
Post by: majormojo on May 17, 2018, 08:13:49 PM
Matt, I have a 65lb ballast (2 plates) already sized and drilled for the seat mounting holes if you're interested.