I don't know exactly what loulou does, but what i do to determine engine inertia values is enter a figure relative to the real vehicles equivalent bhp. For example a 1988s Chevy Caprice replacing the taxi/premier/copcar. I know this is not the correct replacement but but its reasonable to consider and easier to illustrate.
Taxi = 1988 Caprice with 4.3l 140hp V6 = inertia of 140
Premier = 1988 Caprice with 305ci 170hp V8 = inertia of 170
Copcar = 1988 Caprice 9C1 with 350ci 180 V8 = inertia of 180 (or more, some claim this version puts out 190hp)
Higher inertia figures mean slower and smoother acceleration so higher acceleration figures are needed. higher acceleration figures mean more torque. my figures are:
Taxi - Inertia 140/acceleration 23
Premier - Inertia 170/acceleration 27
police - Inertia 180/acceleration 39
These figures give the taxi a 0-60 of about 12 secs, the premier 10.5, and the police car 8.5.
There are other figures that affect this too, mostly drag and grip. My drag figures are usually a lot lower than loulou here so expect some variations here. I use 0.8 for sports cars, 1.0 for sedans, 1.1/1.2 for blocky sedans (eg dodge diplomat) and 1.5 for vans and up to 2.0 for trucks. For the examples I have given, all the vehicles have drag value of 1.1
Anyway thats the basics of how I make my Inertia/acc calculations. It seems to me to give great results.
|Modding the Handling line in GTA Vice City is kinda tricky because due the way the game is made, you need very high mass to acheive the real top speed of a car and there's no inertia,|
For realistic performance in Vice city, what i did was instead of entering weight in kg I multiply by 2.2 to enter the weight in lbs.
Continuing the example, a 1988 caprice 1700kg +/- gives a weight value in VC of 3740.
This seems to work much better and makes it a lot easier to make realistic accelerations while still keeping the values accurate to the real weight of the real-life equivalent.
i am curious to see what others think, and/or do for their calculations.
Edited by zyonig, 10 April 2009 - 02:42 AM.