I have a simulation that I am caching to disk but I only want to cache frame range 150 to 240. When I cache with the $F in the file name it saves bgeo files name.$F.bgeo (150-240) but I would really like it to save as name.$F.bgeo (1-90) so I dont have errors when importing to new scenes.

timeshift your geo after sim to your range (using $F-149)
you can also use Retime SOP for that
then cache frames 1-90

OR (little less obvious when debugging, but should work the same)

instead of naming the export name.$F.bgeo name it: name.`$F-149`.bgeo
or if you need padding: name.`padzero(4, $F-149)`.bgeo

Great thanks! That last one worked great.