k, just realised.
sleep 1 doesn't burn cpu time
so, added this after the dim line in 174 code:
Code:

 for $b=0 to 100000 next


and got:
Code:

Mayan Number Converter passed all 60 tests (100% correct)

KiXtart
KiXtart Version  = 4.52
KiXGolf Script   = kixgolf_mnc.kix

Computer
OS               = Windows XP Professional
CPU              = Intel Pentium Model 13
Speed            = 800 MHz
Memory           = 760 MB

KiXGolf Scoring Engine
Scoring Engine   = 3.0.3

KiXtart Golf Score
Tournament       = KiXtart Golf: Mayan Number Converter
Processing Start = 2006/07/25 19:59:54.241
Processing End   = 2006/07/25 19:59:56.054
Duration         = 0000/00/00 00:00:01.813
TimePenalty      = 5,2
KiXGolf Score    = 198 (193+5,2)