guys, i tried the following :

Axial and Palmaris Carb - problem of not smooth fuel entering the carb, so whenever u start the car, at idle, u throttle, it blup, and not steady idle. this is the exact similar problem with Team Orion Wasp. overheating problem existed. spent the whole saturday noon tuning with these 2 carb, give up and went home after 5hrs of tuning.

Nova Carb - problem solved. pop in my RB carb with the same tuning that i have inside my RB case fitted with BRB (the one that piston broke), so fine tune by richen the HSN. all problem gone. This is Sunday, me started to smile. hahaha...

But it seems it has the similar power compared to Palmaris. only noticed a slight, very slight more power, not very noticable. Problem with this is unable to start when engine is hot. i guess thats due to the metal carb of nova. so the only thing that i like about Palmaris carb is no matter how hot the engine, it still can be started.