My First Buick Build

Discussion in 'Race 400/430/455' started by Vortecpro, Mar 19, 2017.

  1. Vortecpro

    Vortecpro Vortecpro

    In the process of building my first Buick 455, so go easy on me. 4.342 bore, 3.912 stroke, 28 CC dish, 10.69 compression, 149 casting heads, 2.005/1.630 valves, flow numbers.
    Intake @ 28 inches SF 600 4.350 bore.

    .200 133
    .300 187
    .400 208

    Exhaust

    .200 89
    .300 120
    .400 141
    .450 149

    The cam is a hyd flattappet, .398/.466 lift, unknown duration. Intake is a 403 casting factory Buick with a 1971 Buick Q-Jet. I plan on using TA shaft 1.55 ratio rockers. I have the short block finished and its a little rough. Working on the heads. Some pictures. Engine will be dyno tested and track tested in the near future.
     

    Attached Files:

    Julian likes this.
  2. Steve Schlater

    Steve Schlater Well-Known Member

    Mark,
    If this build is anything like your Chevy builds, it will be impressive !!! Is this going into your Stocker ?
    Keep us posted.....
     
  3. hugger

    hugger Well-Known Member

    How bad are your Chevy customers ragging you about building a Buford ? But yea your oval port stuff is Stout no doubt
     
  4. Vortecpro

    Vortecpro Vortecpro

    Thanks, it is for the stocker......everyone seems to like the project, now if I can just get the heads done.
     
  5. tdacton

    tdacton Gold Level Contributor

  6. Vortecpro

    Vortecpro Vortecpro

    I very much agree with you theres room for improvement there!
     
  7. theone61636

    theone61636 Well-Known Member

    Man,those valve guide bosses are huge. I dont remember my 430 castings having so much meat around them. Are you going to use a CNC program to port them or by hand?
     
  8. hugger

    hugger Well-Known Member

    Being a stock classer not much can be done to the heads
     
  9. Vortecpro

    Vortecpro Vortecpro

    This is the dyno test of the engine as it came out of the car before the freshen up. The car ran 11.35 @ 115.98 @ 5000 DA 28.00 baro, the car was right at 3500 pounds. Interestingly the heads supported 474 HP with 208 to 211.7 CFM @ .400 lift. So it makes sense the heads would be the first thing to look at as Troy stated. I also noticed the power is fairly wide through the range the car is run in.
     

    Attached Files:

    Julian likes this.
  10. Vortecpro

    Vortecpro Vortecpro

    I proceeded with the valve job, and of course after setting my valve depths there was one problem child, a seat that would not come in at the proper height after replacing all the guides, good thing I had seats made to fix this potential problem. I installed a intake seat, problem fixed. Valve job is done, CCs will be set at 59.5.
     

    Attached Files:

  11. moleary

    moleary GOD Bless America

    Nice Work
     
  12. theone61636

    theone61636 Well-Known Member

    Nice! Did you have to mill the heads to achieve the CC size?
     
  13. Vortecpro

    Vortecpro Vortecpro

    The heads have been milled.
     
  14. theone61636

    theone61636 Well-Known Member

    What compression ratio are you going for?
     
  15. Vortecpro

    Vortecpro Vortecpro

    10.69 to 1 compression.
     
  16. Vortecpro

    Vortecpro Vortecpro

    Preliminary dyno testing data is in, 522 HP @ 560s TQ. I want to thank Chris Skaling for his help with this project.
     
    Last edited: May 16, 2017
    Julian likes this.
  17. hugger

    hugger Well-Known Member

    Very nice what are the cam limitations for your class?
     
  18. 8ad-f85

    8ad-f85 Well-Known Member

    Nice job!
     
  19. Vortecpro

    Vortecpro Vortecpro

    The cam is a hyd flat tappet with .398 intake lift, 466 exhaust lift, 253 @ .050 on the intake, 264 @ .050 on the exhaust 108 lobe separation. Heads are 1971 149 castings with 2.005/1.630 valves.
     
  20. moleary

    moleary GOD Bless America

    Cheers!
     

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