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Thread: Detonation

  1. #1
    SBC Jetboat
    I am not having a problem with detonation, just wondering how in the heck can you tell if the timing needs to be retarded with a loud lopey boat engine without running a knock sensor.

  2. #2
    N02 Chevelle
    Do it in your driveway. Hook it to your hose and fire it up. On my Chevelle engine, (383 ci) I run to about 3200 rpm and adavnce the timing till it starts to detonate or "ping" Then I back it off two degrees. This makes sure I'm getting the most total timing out of it. And it does get loud but trust me, you can hear the "ping"

  3. #3
    SBC Jetboat
    Im more concerned about under load

  4. #4
    cfm
    Read the spark plugs. They are in the same chamber as your valves and pistons, they will show you what's going on.

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