Break-in and Timing question 79 400

Discussion in '1973 - 1979 Ford F100, F150, F250-F350 Truck Forum' started by Jones1965, Feb 15, 2023.

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  1. Jones1965

    Hello,
    I'm helping with This 79F250 trailer special with a 400 and C6 we are Very close to being ready to fire this newly rebuild engine. The engine was rebuilt by a reputable local engine guy who put a " RV cam" in
    it And he gave Break-in instructions. These instructions involve running the engine at 2000 RPM's for 20 minutes as soon as the engine is started but surely one is expected to take the time to set the timing before Revving the engine for such a Extended time. What are your thoughts on this break-in Procedure and How many °Of timing Would you estimate a 400 with this " RV cam" (don't ask me the cam specs. I have no idea) Would likely be at at?
    Thank you for your thoughts.
     
    Jones1965, Feb 15, 2023
    #1
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  2. FTZ HAIC Staff Member Oregon Chapter Founding Member

    This guy gives far better details than I can:
     
    FTZ HAIC, Feb 15, 2023
    #2

  3. captchas

    follow your rebuilders instruction,
     
    captchas, Feb 21, 2023
    #3
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