Help Help Help!!!!

[Pac-Man_G]

ok I have a big race coming up with a honda civic EJ 95 coupe with a Jdm D15B LSD and all... I'm packing a 94 cx hatchback powered by a d16z6 i'm think it will be a good race my car is lighter and i rode in his car i don't think the vtec works or it just don't pull hard but it easily revs to 8500RPM mine on the other hand my only revs to 5'500RMP so thats my question.you have hear and feel my vtec kick in but i'm thinking it should at least go to about7,500 - 8,000 RMPs because its like vtec kicks in then i have to shift. if i could rev high i think i can take out the JDM D15b out no problem. i also have a spark plug wire that pops out ever now and then could that stop my car from reving high? plz help my find out why my car doesn't rev high for the sack of all the D16z6 out there..lmao