91stang331

While I'm just crusing alonea a certain speed 30 40 50 whatever I keep thinking I'm hearing detonation. My timing is set a about 14/15. I thought detonation only occurs aunder heavy loads? Any Idea if it could be detonation or any other suggestions of what it could be?

91stang331

ANY suggestions would be app. even if it sounds stupid throught it out there. Have questions on my set up ask. The sound is very faint I can hear it throught the exhaust not under the hood.

fordguy17

let us know your combo. what octane are you running? did you maybe get a bad tank full?

you can hear detonation from the exhaust? is it backfiring maybe?

91stang331

It's a 331 built more for a super charger/dished piston but right now its n/a. I've had the problem through more then one tank of gas, I run 93. Ya it could be like a backfire its hard to explain. while just crusing at a steady spead you can hear a reacuring backfire sound but it is very faint. I hope this helps. I was told by the shop that made my moter it could be because of the cam. Not 10% on the exact specs but its a pretty stout cam, but is suppose to still be computer friendly. Will try to look up vcam specs if you thnk it will help.Otherwise I have every bolt on from intake to exhaust can get more specific if you think it wil help. I'll put together a list tomm. THANKS for the response!!!

91stang331

does this help if you need more info let me know . Any other suggested causes?