There are few factors may affect your 0-100 timing.
1. Air temp , Day time Or night ?
2. Load = extra stuff like sub woofer box+amp, fuel level, extra person ?
**Note: every 50kg u safe = 2 sec improve especially for a small displacement car
3. Air cond on or off ?
4. Tire pressure ? rolling resistance
5. Tire dimeter = 13" up grade to 15" any outer dimeter change ?
6. Modification to the engine was done by the skilled sifu ? Any calculation or real H/P gain through the modification ? Air fuel mixture ok or not ?
7. Engine oil ? thicker the oil, slower the car. Change to synt oil may helpful.
8. Engine tuning= is your engine in tip top condition ?
9. Exhaust dimeter = bigger doesn't means better. Must suit your engine. Remember N/A needs some back pressure for them to work properly.
If you done the above factors correctly i'm sure you will get better result.
I witness one of my friend mod his 4g91 ( DIY without correct calibration) from header to cylinder head to injector to AFC to cam gear. However he kena tapou by a slightly mod 4g91 (My Wira he he he he ). Why? Proper tuning.
Next time you try, remember to take off your spare tyre (safe some kgs), it may helps :lol: :lol:
Good luck.
P/S Safety first and make sure it will not harm other road user.
