i will bow to you lads greater knowledge of the newer way to gain power from a petrol motor!

ok so im running a lot of zetecs, having one done atm with bit of head work, cams and a big carb goin on it right..

but up to now i run using a standard wiring loom but im wanting some info and how remapping or getting an ecu chipped can help me?

at the minute the only ecu i have is from a 1.6 but i presume it doesnt matter much if its gonna be chipped or remapped does it or should i get my hands on an ecu from a 2 litre?

any help or advice greatly appreciated