Originally posted by smokedurv8
my kit was activated by a full throttle switch.
my car was DYNO tuned. i had 2 nitrous backfires trough the intake while on the dyno. how i blew my motor? I was about to race a carmaro so i armed my NOS. at full throttle at about
5000rpms or so i had a back fire so i let off the gas and i floor it again.....another back fire floor it a third time and that was it.one of my valves hit the piston.i pulled my plugs out and the tip of the #3 and 4 plugs were blown off. i cant remember what the part # was for the plugs were but they were 2 degrees colder.
Sounds like you had an installation issue, you were backfiring because you had fuel on the intake side. You were likely puddling fuel, where did you have the jet placed? You should have fixed the back fire on the dyno WAY before going on the track.