Just brought a jet v-chip for my Astra 1.9 cdti 120bhp is it any good will it damage my engine and how much more bhp would i get?

Just brought a jet v-chip for my Astra 1.9 cdti 120bhp is it any good will it damage my engine and how much more bhp would i get?
about 17 but what ever you do don't go over 19.8 cause that's when the main berg holder starts to gunk and diffuse everywhere. that 1.9 cdti is super awsome tho. i found that i really like the jet-xz chip tho it really boosts my inter connecting reciprocating relay time. It increases it by about 3 mega-bogins. Hope that helps yeah. Im from norwayvilleston so sorry about the herepes