Another 421 Torque Monster AFR 1094-716 Heads

Discussion in 'High Performance Modifications' started by CNC BLOCKS, Nov 22, 2020.

  1. CNC BLOCKS

    CNC BLOCKS Veteran Member

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    Another great day on the dyno, 421 the only difference from the last 421 is I used the AFR heads 1094-716 and I used a 1.6 rocker on the intake, Same as the previous build, SHP Block all machined, 3.875 stroke crank I did use the Callies Compstar 6.0 rods, Mahle pistons, Same cam 238/242 on 108 Lobe sep . Intake lift .611 Exhaust .573 Made 591 Torque at 4100 RPM and 555 horse at 5900 RPM, Same Carb, Intake, Dist. This engine only required 30 degrees of total timing, From where I started I was at 34 degrees of timing kept moving it back 30 Degrees was the best and went with a 34 high speed air bleeds. which gave me 14 more FT.LBS of torque
    and 20 more horse.

    Here Was the last build with the AFR 1036 heads
    https://nastyz28.com/threads/421-torque-monster.333043/

    [​IMG]

    [​IMG]
     
  2. Zstar

    Zstar Veteran Member

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    Great engine! And that is the color an sbc is supposed to be!!! LOL.
     
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  3. joel l voigt

    joel l voigt Member

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    That's a very stout engine!
     
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  4. 2ndGenCrazy

    2ndGenCrazy Veteran Member

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    This appears from my calculations to have been a very "honest" test. That is quite rare these days. Only about a 2% correction per J607 tells me the IAT was around 65F in the test cell.
    I have put "smallish" cams in engines that still produced very impressive numbers backed up by track performance at a later date. To me, that is a very potent street engine, that properly applied to a Camaro, would be low 11 performance at the track. Needless to say, I like your approach to a true street engine. Nice work.
     
  5. biker

    biker Veteran Member

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    Incredible numbers all in the right places for a street/strip motor. Looks great too.
     
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  6. sandlapper

    sandlapper Veteran Member

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    A good pan-tray unleashes power; seems that Champ is doing a good job as well
     

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