mobile-menu-icon
GM Authority

What horsepower is this motor

Viewing 6 reply threads
  • Author
    Posts
    • October 30, 2011 at 10:54 pm #38210
      TimK
      Participant

      Have just fitted motor to my Corvette,it is 383 four bolt,KB 10:1 hyper pistons ,hydraulic flat tappet cam at.050 duration 214/224 at 444/467 lift,Edelbrock performer heads with LT1 springs ,hugger headers through single straight through Lukey back out to two pipes,standard oil pump ,three core alloy radiator,Holley 670 street Avenger ,wieand dual plane manifold,recod t/h 350 with stage two shift kit 3000 hi-stall Hei dizzy.Running 255x60x15 rear wheels.Any ideas on improving cam and general engine performance? Cam does not have as much lope as hoped for but it must be able to supply vaccum for brakes and lights.

    • October 31, 2011 at 9:38 pm #38485
      wbodyfan
      Participant

      I’d guess somewhere around 500-600 horses depending on tune. I’m no engineer, but that sounds like a sweet setup. Have any pics?

    • October 31, 2011 at 10:43 pm #38486
      Alex Luft
      Keymaster

      Yea @TimK — do you have any photos? And are you asking us to guess or do you really not know how much it puts out?

      Would be fun to dyno it! 🙂

    • November 26, 2011 at 5:26 am #38570
      RjION
      Participant

      Put it on a dyno and find out …………………

    • December 29, 2011 at 2:13 pm #38734
      aza993a
      Participant

      500-600? Not with that cam. With a good sized cam, I could see 450 at the wheels possible, which would be around 500 at the fly. As it sits, maybe 400-450.

    • September 23, 2012 at 1:58 pm #40587
      C6RAPTOR
      Participant

      I agree, MAYBE 400-450 is pushing it with the cam.

    • October 5, 2012 at 11:27 am #40602
      rwbernie
      Participant

      Hi ,Im a newbe here and have always loved gm, about this motor, i have built a few, to get over 400 hp out of that combo you need a comp cams hydralic roller cam, about a 286 grind or better,will match the converter and make an easy 450hp with a good intake, like a performer air gap and headers, also a little bigger carb.

  • Author
    Posts
Viewing 6 reply threads
  • You must be logged in to reply to this topic.

Subscribe to GM Authority

For around-the-clock GM news coverage

We'll send you one email per day with the latest GM news. It's totally free.