Engine swaps could be done. Maruti 800 has a tight engine bay. Throwing in a larger engine may need altering of Engine mounts, aprons, drive-shafts etc. I think its not really worth it for my car. My idea (for this car) is to have fun on a budget. lol.
We did a swap for my friends ride sometime back.
Stock Maruti Zen G10BB (4cyl)
Engine was swapped with a JDM cultus G15 block (bottom end) with a high flowing GTi DOHC G13 head. The light Zen chassis with this setup turned out real fun.
One of my other friends is in the process of putting a 2JZ engine into a older BMW chassis. Engine, tranny gone in - in the process of sorting electronics.
We did a swap for my friends ride sometime back.
Stock Maruti Zen G10BB (4cyl)
Engine was swapped with a JDM cultus G15 block (bottom end) with a high flowing GTi DOHC G13 head. The light Zen chassis with this setup turned out real fun.
One of my other friends is in the process of putting a 2JZ engine into a older BMW chassis. Engine, tranny gone in - in the process of sorting electronics.