the a3 has a form of vtec-e along with vtc. so it's not the best starting platform for a good NA setup. k20a2 and itr heads have true vtec and vtc and flow very well. tsx heads flow even better.

 

yay the k20a3's i-vtec isnt a "true" vtec system in the traditional sense cuz the vtec only affects the intake side and nothing on the exhaust side...cams arent nearly as good as in the k20a2 or k20a.....plus as already stated the head just doenst flow as well...yay the k24 bottom end w/ k20a2 head is INCREDIBLE...its essentially a modern "ls vtec" if you will

 

whats NA setup?

 

n/a=naturally aspirated
FI=forced indcution(sometimes FI but can also mean fuel injected)(means some type of power adder like nitrous aka n2o, turbo, supercharger aka s/c or a combination of any)

 

thanks.

 

can u just use cams from the other head and swap them in and use an ecu from a different civic? or are the head designs entirely different?

 

no you can not use the cams from the k20a2 in the k20a3...yay the heads are essentially a night and day difference

 

so i gotta swap heads, from the a3 to the a2?
yes.. i think
anyways how much are they and like is the swapping process hard?

 

www.k20a.org

lots of info