ballast mounting requirements

[DKrause615]

Is it legal to mount lead ballast inside the car?  I plan on using two 1/2" grade 8 bolts per 60 pound lead bar??

[dickj]

Something to think about.  Unless this is a very low car with underslung suspension, anywhere inside the body is probably going to be too high.  Ballast seems to be most commonly mounted below the axle centerline.

[John Burk]

If there is much ballast something to think about is polar moment of inertia . Adding the ballast at the ends of the car increases the polar moment and slows the yaw rate giving the driver more time to react . Sprint cars have the engine and driver close to the cg so the driver can pitch it quickly "sideways" entering a corner .

[thundersalt]

What are you bolting it to? 

[Dynoroom]

Is it legal to mount lead ballast inside the car?  I plan on using two 1/2" grade 8 bolts per 60 pound lead bar??

Yes it's legal to mount this way. Make sure it won't move as the inspectors can / will grab it to make sure it's mounted solid.