Hi everyone, my current ride is a 2011 Lancer with a 4B10 engine and a 5-speed manual. Am planning to upgrade the engine with the following mods:

- Swapping in a full 4B12 but replacing the crankshaft and rod from 4B11, for shorter strokes
- Stock 4B11T intake cam while maintaining the 4B12 exhaust cam
- 60mm TB from a 4G69
- Port & polish and engine balancing
- Proper engine tuning
- May also look into shorter gear ratio in the near future

Questions:
- Should I go with a bigger 65mm TB from Mitsubishi Outlander or keep it at 60mm?
- Am I maximizing the potential torque and power output with the above mods, is there anything else that I can upgrade / swap? Or is any of the mods are not recommended?

I still prefer NA so will not consider BOT or swapping in a Ralliart / Evo X engine.

Any feedback will be most helpful. Thanks!

 

short strokes are for high RPM, F1 would be the extreame.
Long strokes allow for more Torque.

Bigger throttle body will decrease the part throttle feel of the car.