I run a viair 450c with a 2 gal tank it can get my 35 13.5 15 crawlers from 10 psi up to 25psi for the drive home in less than 10 min, and it is 100% duty cycle so if my wheeling buddies need a little no problem.
The 90c has a 9% duty cycle at 100psi could not find the rating for 50 but it may overheat and shut off before you can get aired up.
most compressors are rated 50/50 which if I understand it is out of every 50 minutes you can run it 50% of the time or 25 min. and then let it cool for 25min. Using 9/50 that would be about 4.5 min. and cool for 45 minutes. Maybe good for running ARB and filling a low tire, but may leave you wanting more.