Information on the 1/4 mile calculator selection criteria
POWER - this is the power your 2JZ-GTE is making on the dyno at the rear wheels. Don't forget to choose whether the power is rwkw or rwhp. If using
NOS for the entire run then add the NOS jet size to the total power you are making.
LAUNCH ASSIST - This is what extra assistance you have to launch the car. The default is None, but perhaps you have a 2 step or NOS or a QSV (quick spool valve).
DYNO TYPE - different types of dynos give different rwhp readings so choose the dyno type you will be using. The Dynojet is used in the USA, the Dyno Dynamics in
New Zealand/Australia and the Dynapack in USA/New Zealand/Australia. WARNING: The Dynapack dyno can be run in a number of different modes. These
different modes do produce slightly different rwhp figures and as a result the drag time calculation for the Dynapack dyno may be slightly inaccurate.
GEARBOX - select your gearbox type. Note that automatic gearboxs produce lower rwhp readings for the same engine hp.
SUPRA MODEL - this is the model of Supra that you own.
WEIGHT - If your Supra is not the standard weight then enter in the total weight of your Supra if you know what it is, making sure you set the KG or LB option.
BODY TYPE - this is the body type which can be liftback (standard) or aerotop.
TIRE - these are the tires you use at the drag strip. Drag slicks are by far the best tire to use if your racing class allows them,
then Drag Street Bias-Ply (e.g. Mickey Thompson ET Street, Hoosier Quicktime) which most classes allow, then Drag radials and finally
your everyday Street Radials, which are absolute crap at the drag strip. If you want to go fast get some Drag Street Bias-Ply tires
or Drag Slicks.
TRACK PREP - this is how prepped the track is with VHT or similar track preparation fluid to obtain more grip for the tires. Prepped
is fully prepped the entire track length, semi-prepped is usually just prepped for the first 60 ft or the first half of the track, un-prepped is no
track prep at all.
Email Kevin if you think this calculator is wrong or you have any suggestions for
improving it.