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Thread: 406 vs 421 or 434

  1. #1

    406 vs 421 or 434

    I am ordering a 406-434 from Nyes. Was wondering how much I will lose out on if I get a 406 instead of a 421 or 434. I bracket race a dragster, want to go about 7.90. Car weighs about 1500 with driver. I run Brodix 11x heads so I need a different piston to go with the heads. JE make a piston for a 406 and 11x heads but not for a 421 or 434. Custom pistons would have to be ordered for 421 or bigger. That would take 3-4 weeks. The 406 is cheaper and quicker to get than the others, will I regret not waiting and spending more???

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
    Join Date
    Jul 2007
    Wiseco makes an off the shelf for 11X heads. I ran 8.20's 250 pounds heavier with home ported 11X's with a 427 (4.125 bore). There is some time left in it by cutting the deck, better converter, and some shaft rockers, better springs and bigger pushrods. 7.90's is not unreasonable.
    Mark Whitener

    Good work isn't cheap, and cheap work can't be good.

  3. #3
    I will see what wiseco has. THANKS

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Coldwater, MI
    IMO a 406 will get a 1500lb car easily to the 7.9's with the right setup, our camp has a 406 @ 1700lbs that goes 8.0's.

    I am sure Nye's will suggest the 421CI motor, you should call and talk to Pat @ Nye's he will hook you up with all the info on the motor you need.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines

  5. #5
    Talking with pat now he says maybe a 427 and is looking for the pistons now. Thanks for the reply it really helped. I thought I was stuck with a custom piston only.

  6. #6
    Senior Member EXPERT BUILDER
    Join Date
    Jun 2005
    potash country
    My Altered weights 1850lbs. with me in it and I'm guessing its around 690hp. I ran my numbers(check below) at 700ft. above sea level with a 30mph head wind,(Sept 07). I'm hoping for a 7 second this year 8)
    If a 5 lb hammer can't fix it,it must be electrical
    Keep the shiney side up! 8)

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