Timing box question
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Timing box question
Alright guys, I'm using one of those "horsepower in a box" timing boxes to retard my timing 5 degrees for my nitrous. I was wondering how I can test it to make sure its pulling 5 degrees. I know this box tricks the pcm basically to make it pull timing so if I hook up hptuners and say I'm running 28 degrees will it show 23 or will it still show 28 since its just tricking the pcm to run 23?