RP CODE 69 350 BUICK SPECS

Discussion in 'Small Block Tech' started by 72stage2, Sep 22, 2021.

  1. 72stage2

    72stage2 Well-Known Member

    Ok I have two questions for you guys #1 The rp code 69 350 was rated 280 hp net and 10.25.1 comp. ratio. My question is does anyone know what the actual hp at the crank was? Also what the actual comp. ratio would be? The reason for asking is my son is trying to pick a cam for this motor that is an actual 65k mile motor all original. Never rebuilt, stock pistons ect. Also he is considering changing to the 70 and later pushrods and rockers that the pushrods oil the rockers, is it worth the cost and is it better oiling for the top end than the 69 solid pushrods? Your thoughts thanks Kirk.
     
  2. sean Buick 76

    sean Buick 76 Buick Nut

    No it is not worth changing anything regarding to oiling. The actual compression should be about 9.25:1. Educated guess is about 240 HP using modern testing. A TA 212 cam is as large as I will use without ported heads and compression over 10:1.
     
  3. 72stage2

    72stage2 Well-Known Member

    Thanks for the input. Anyone else have some input or data? Larry?
     
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Last edited: Sep 27, 2021
  5. Fox's Den

    Fox's Den 355Xrs

    I know how much is at the crank Not enough. The 212 cam or the next one down would be as far as I would go.
    Put a 4bbl with a TA DP intake and put some 1 5/8 headers on it with duals and it will run decent. If you want more you need to tear the whole thing apart and re do it all. Pistons rods etc.

    If you plan on revving the engine past 5200 rpm then do the oil mods on the engine that open up the galleys with oil pump rebuild.

    performance stock gear 3.23 a little hot rod performance 3.42 want to make the next guy lose 3.73 smack the whole world around 4.10 gear. build the motor accordingly to these gears LOL.
     
    Mart likes this.
  6. Premier 350

    Premier 350 Chris (aka Webby)

    Great thread!
     
  7. 72stage2

    72stage2 Well-Known Member

    Ya great thread. Thanks you guys and Thanks Larry
     

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