Before you laugh, I know only the real world at a track will give true performance, but I was wondering about numbers when using some of the latest games like GT5 or Forza. And, no, I'm not trying to say that my car can do "X" because I did "Y" in a game, but anyhooo...
I put together a car in Forza that came as close to my current Subaru as possible. The only significant difference is it's RHD drive, but the numbers match, even down to the gear ratios.
I ran quite a few 1/4mile test drag races and kept coming up with a consistent 12.99 ET at 109 trap speed. I've seen other cars with similiar setups on the forums post sub 13sec times, so it made me wonder if this kind of testing might be worth while.
To tell you the truth, my main reason for doing this was to get a better understanding of how the taller ratio gears in my PPG tranny is suited to drag racing, over the stock 5spd OEM gears. Shorter gears make for better acceleration, but the taller gears are supposed to support faster speeds in the rpm range and keep the boosted power within a more usable rpm range. So you cross the line in 3rd or 4th (without hitting redline), as opposed to 5th like in a stock STI tranny.
The game tests did show an increase in times from 13.25 ET with the OEM 5spd gear ratios to a 12.99 ET with the taller PPG gears.
Gear ratios (rounded) used for modelling are for a 07 WRX 5spd tranny:
OEM: 3.45 / 2.06 / 1.45 / 0.88 / 0.78 (3.90 Final)
PPG: 3.08 / 1.84 / 1.32 / 0.95 / 0.78, (3.90 Final)
Tire size is the same for both (245/40/17, very close to the stock speedo)
Does it make sense to use a "game model" to see why a PPG set with these ratios would perform better in the 1/4 mile?