dear all,

 

i wanna upgrade my 4k engine power up alittile but don't need to change anything in engine. does anyone have best suggestion?

 

thank you very much!

Have a read of this bro.

 

http://www.rollaclub.com/wiki/index.php?title=Tech:Engine/K_Series/How_to_build_a_tough_K_motor

these are well performing engines, a little here and there makes a noticeable increase in power , simple mods like free flow exhaust and webber downdraft is a reliable everyday run a round.

next step further maybe add lighter flywheel and aftermarket camshaft

thank you!