5s would be a better choice with the 9920 and 9xl. You could run an 8xl with 4s lipo, but the extra voltage from the 5s will help move the heavy savage around. Plus the motor and esc will run cooler with 5s.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens
Doesn't the savage weight in a tad more than a maxx or revo? If not, then sure a 9XL will do.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens