my friend has a 99 honda civic ex... its got the d16y8 in it and is stock besides and intake and axle back exhaust. we recently installed a zex #82011 nitrous dry setup. now that we are done he wants to know if its safe to run (what a time to ask yeah?)... we retarded the distributor timing right around 4 degrees but our concern is his spark plugs.. they are ngk v-powers zfr5F-11... i told him to get the heat range 7 spark plugs but still coming he said... so would it be alright to run a 55 shot, possibly a 75 shot with what he has now?

 

55 yes but 75 i wouldnt risk

 

hrrmm.. ok.. thanks any1 else?