In this example (wife's GAGT): axle ratio is 3.29, tyre diameter is 24.86" or 631.4mm.
Delete whichever of the two equations that you're not using.
Code:
# ==============================================================================
# File details
# ------------
#
# This section defines various details about the file format.
*FILE
#Parameter Value Description
#---------- ---------------- ---------------------------------------------------
VERSION 7.1.1 File version
DECSEP . Decimal separator used in this file
# ==============================================================================
# Units
# -------------------
# See sae_generic.txt for more information on the *UNITS section
*UNITS
#Code System Abbr Description
#-------- ---------- -------- -------------------------------------------------------------
None None "" "No units"
# ==============================================================================
# Add slot definitions here
# --------------------------------
# See sae_generic.txt for more information on "SLOT" formats
#
#Units Low High Fmt Expression
#------------ ------------- ------------- ---- --------------------------------------------------------------
*CLC-00-062
None -4.0 4.0 .3 "{SAE.RPM} / {SAE.VSS.mph} / 336.135 / 3.29 * 24.86"
None -4.0 4.0 .3 "{SAE.RPM} / {SAE.VSS.kph} / 5305.16 / 3.29 * 631.4"
# ==============================================================================
*PRN - Parameter Reference Numbers
# --------------------------------
# See sae_generic.txt for more information on the *PRN section
#
#Code PRN SLOT Units System Description
#------------------------- ---- ------------ ---------------- ---------------- ------------------------------------------
CALC.RATIO F062 CLC-00-062 "None" Calculated "Calculated Box Ratio"