Hi guys....im newbie here & just wanna ask ur opinion about my project car ae111...
Is there any cold systems different between aloy radiator (big size & small size) ?

Another things...hw I want to solve knocking problems in my engine?
Using BT 6speed

There's no different i size, as long you have good water flow, for the knocking you may need to change gas grade to higher octane. Low octane some times causes knocking.. specially if the engine is old or needs a tune up.