pli

so im posting for a friend. he has an em1 with greddy headers, arc intake, apexi ws2 exhaust but also still running stock cat. he recently put in CTR cams..and he feels like its still not doing him justice. would buying a piggyback vafc actually help in this case? like, hes not expecting a lot...but hes just wanting to pull as much power out of bolt on's as much as possible. like maybe a vafc with a good tuner to adjust the air fuel?

obuhmyuh

tell him to get it dyno tuned. best bang for your buck.

pli

wouldnt i still atleast need some kind of piggy back system for them to tune it or do they have their own program to tap into the ecu?

obuhmyuh

correct, hondata s200/300 will work just fine. not sure about apexi or other brands though, sorry. im just trying to say that by taking it to a professional tuner, your going to get the most out of your engine and mods. sorry i read the last sentence in your post again and i thought it said "with a good tuner to adjust" and i thought it said some like and give it a good tune. my bad. just get an s200 and call it a day, i think some places will give u a discount if u use s300 because its so easy to tune with, but its pricey.