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Blown 364 Buick Nailhead

Discussion in 'The Hokey Ass Message Board' started by camshaftchris, Feb 28, 2011.

  1. camshaftchris
    Joined: Jan 21, 2009
    Posts: 60

    camshaftchris
    Member
    from appleton

    HI folks,
    I plan on running my 6-71 blower on my 364 nailhead. The engine is a low mileage, 10:1 compression stocker. Since the engine is in great shape, i dont want to tear it down and change the pistons, etc. My plan is to run the blower at around 4 pounds of boost with a cam ground to allow more duration on the exhaust. I am not drag racing this car or anything like that but I would like to get a mild performance boost with the blower without detonating the motor. Anyone have any experience doing this?
     
  2. Well at least you are not asking about a camshaft that has a rough idle. :rolleyes:

    A lot of the fellas are gouing to give you different advice. But here is mine, I would not huff one without running either the block or the heads O-Ringed. The engine is a low mile engine? I wonder how well your rings are holding? You get zero blowby? I'm going to guess that with 10:1 even with 4 pounds you are going to make some pretty good cylinder pressure.

    This is not advice just thoughts and enough to get the experts started.
     
  3. camshaftchris
    Joined: Jan 21, 2009
    Posts: 60

    camshaftchris
    Member
    from appleton

    The engine has less than 20k on it. The guy who bought the car originally wrapped it around a tree and kept the motor for a future hot rod. I turned it over once a month (by hand) and oiled everything up. I took it apart and everything was beautiful and shiny. I plan on putting a mils supercharge cam and I could pull the heads off at that time to put in O-ring gaskets if necessary.
     
  4. camshaftchris
    Joined: Jan 21, 2009
    Posts: 60

    camshaftchris
    Member
    from appleton

    Just trying to get by as cheap as humanly possible with this car, plus im going completely old school. Im using all pre-1965 equipment. The suspension im using is from a 1948 f-1, so I wont be able to use much power anyway. The stock motor is rated at 300 horse, so I would like to keep it around there after I put on the blower. Surely there is someone who has cobbed a blower on a stocker and ran it for awhile? Oh yeah, I was alos told that the bottom end of a nailhead is bulletproof, but i should put in some stronger connecting rod bolts.
     

  5. flamedabone
    Joined: Aug 3, 2001
    Posts: 4,873

    flamedabone
    ALLIANCE MEMBER

    10 to 1 is way high for for a boost application. (maybe not in a latemodel Vette, but that is WAY diffrent.)

    Is there any way you can swap heads to something with more chamber cc? I would feel way better at 9.0 or less, particularly with a cast piston and iron heads, but I would feel even better at 8.0

    If it were me, I would spend the money on a set of pistons that would get you in the 8 to 8.5 range, then you could run 6#s or so with out wondering if this is the time when you have to stop and pick up parts.

    O-rings are good insurance over 10#s or so, depending on your combination, but not manditory at your level. These days, Cometic gaskets can take the kind of pressures that you used to have to O ring for. I have a bazillion miles on mine at 10#s with no O rings and over the counter head gaskets.

    Hit the search for lots of good blower threads, but the basics are get your compression down to 8 or so, keep it about 6#s and mind your timing and air/fuel mixture. She will be a trouble free driver and make huge power that will make all your Chevvie buddys cry.

    Good luck, -Abone.
     
  6. do you have an intake yet? might be a little costly to find one....
     
  7. camshaftchris
    Joined: Jan 21, 2009
    Posts: 60

    camshaftchris
    Member
    from appleton

    Im making an intake right now. Im using valve springs for the burst plates for that authentic old school look. I agree that ideally 8 to 1 compression would be the way to go, but pistons for this engine would run me about $700 and then I might as well bore it, replace the pins and rings at the same time. That would cost me some big $'s. I would rather take my chances, if I blow it, then ill rebuild it!
     

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