I was the race director for the ISC - Ultimate Speed Challenge at the Drag Strip at California Speedway a month ago, and I can tell you reaching 100 MPH is not an easy thing to do (Even on a Smooth Drag Strip with 2000 ft. of run space)

NITRO or ELECTRIC those guys struggled...except for a couple of the more experienced ones...

TIRES are generally the NUMBER 1 issue.

Keeping a TIRE from Ballooning and shredding due to the RPM's at that speed is difficult.

One of the most impressive cars (to me) at the ISC event was the OFNA GTP off road car. That thing was FAST and DURABLE when it did get crashed...it took it and kept running STRONG.

To actually achieve a legitimate 100 MPH Top Speed on DIRT or Off-Road would be cool to see... (I know that's not your goal, but I'd love to see it)

I live near PISMO BEACH and there is a Sand Highway that you can drive on the damp flat sand....they use to hold SAND DRAGS up there - That would be a fun place to watch it.