a friend of mine has a 92 se-r with gti-r motor at 12 psi and the spark plugs and tail pipes get black soot quick. put new plugs, msd ignition and next day same ****! he ran a 13.7 @ 104 at englishtown. something is very wrong with that picture! I'm thinking he should re map the ecu with JW again! any advise for us shade tree mechanics!