Supercharging a stock 430-4

Discussion in 'High Tech for Old Iron' started by 1968buick430Riv, Sep 26, 2013.

  1. 1968buick430Riv

    1968buick430Riv New Member

    Has anyone ever supercharged their 430? Would it hurt my stock motor? And how much more HP could I get out of it? Thanks
     
  2. flynbuick

    flynbuick Guest

    A stock engine may have too much compression for a sc.

    You would need some good protection designed into any application.

    There would be a risk of detonating your engine.

    It woud be diffficult to get a sc to fit under the hood.

    The Hp gain is dependent on how fast you turn the screw.

    The faster you turn it, the higher the risk of detonation.
     
  3. Babeola

    Babeola Well-Known Member

    A cam with a wide lobe separation and a late closing intake would bring the dynamic compression to an acceptable level for supercharging and detonation prevention. Then issues with cast pistons and the head gaskets will be in the way of success. Neither will allow much boost before failing. There was a fellow named Rich that chronicled his ATI procharger build over a several year period here. It is a very good read if you have some time. I would search the site under ATI procharger. He wound up with forged pistons, intercooling and better head gaskets. The full weight car was pushing 10 second quarter mile times with 9# (or was it #12?) of boost.

    Cheryl :)
     
  4. sailbrd

    sailbrd Well-Known Member

    It could be done if you use E85.

    The first thing you would have to do is a fuel system upgrade. This is getting easier with some of the new in tank pump setups. Plan on at least $800 for the fuel system. Because of the E85 you would have to use teflon hose but that is a good idea anyway.

    What type of supercharging? Positive displacement or centrifugal? Both have their own problems and very little support. If you want to do a Procharger there are a few of us that can help you. I am planning on a few improvements to my brackets and spacers this winter and could help you out there. Will also have to come up with a crank pulley and spacer. I looked into a custom crank pulley and could get one built for $1000:eek2: One of these days will get some aluminum pulleys and weld the blower pulley on those.

    Next problem with centrifugal is power steering. My setup has power steering. It uses a GM type II pump. Again all custom stuff.

    I know a q-jet can be set up for blow through but not sure about E85 so plan on a new carb. Again a few of us have been there so you could bet some help.

    I love the looks I get at car shows and part of the deal for me was the challenge of putting the puzzle together. If you are just looking for performance you would be dollars ahead with one the performance builds available from one of the main Buick builders. It will cost you at least $4000 to go the supercharger route. But if you want the whine and having something no one else has let me know and will do what I can to help you out.
     
  5. CJay

    CJay Supercar owner Staff Member

    Putting it on a bone stock engine with over a 100k miles that already has an internal engine noise might not be a good idea
     
  6. sailbrd

    sailbrd Well-Known Member

    can and should are two different things
     
  7. real82it

    real82it Silver Level contributor

    I speak from experience...built a high mileage supercharged Chevy a few years ago.....blew a head gasket, fixed it, then the fuel pump failed under boost and I took out two pistons. A boosted motor needs a reliable, complete system to be dependable.

    I now have a 550hp supercharged motor....but it takes planning and money.

    With the compression and miles on that 430, I think you are begging for destruction.....so unless that is your goal, I would come up with plan B.
     
  8. alec296

    alec296 i need another buick

    plan b. pull engine ,fresh rings and bearings,284-88h cam port heads and intake,shorty headers and tune well.with 4 degrees of advance on cam you should easily make over 400 HP and 525 plus torque.
     
  9. Briz

    Briz Founders Club Member


    Did all of the above except used the TA 290-08 cam and came up with 400hp/500tq. Power curve came in at 2500 and dropped off at 5000 Old Riv pulls hard!
     
  10. BUICKRAT

    BUICKRAT Got any treats?

    kaBLAAAAm
     
  11. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    Short answer is about 50% more power. If you are making 300HP it'll go to roughly 450HP. Torque curve down low will likely fatten up too.

    Can and should are indeed two different things....
     

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