Is this necessary? I read the manual and it mentions using the SRAM to load Kickstart.
Will this greatly affect performance with no SRAM installed?
Necessary? No. If you have the ram board then you can still use the MMU to load kickstart into 32bit ram. If you don't have the ram board either then yes it will greatly affect performance.
http://amiga.resource.cx/manual/Mega-Midget_Racer.pdfAccording to the manual you can use the static ram as normal memory as well, if you can find the chips then it's worth getting them.
