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Thread: sbc drag racing engine...

  1. #1

    sbc drag racing engine...

    my question is this... i have the chance to build a race only engine for my 3000 lb... race ready vega...should i go with the... 383.... or 377... or 406... i have a good 400... 509 2 bolt block... it needs to turn 7200 at the lights.... any help would be great... thanks in advance.........caveman... :?

  2. #2
    Senior Member RACING JUNKIE
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    Go with the 406" i've got a 377" in 3250 lbs and it has no torque for that much weight, even on alcohol. i had a 406 on gas in the car and ran better and quicker 60' times. But i broke it because i didn't have good rod bolts in the pink rods (boke a rod bolt)
    The 377' in my car is a 2 bolt, and the 406" was a 4 bolt blk. Luckly it didn't kill the 4 bolt block and i still have it
    JMO

    Zip.

  3. #3
    Senior Member MASTER BUILDER
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    Quote Originally Posted by zipper06
    Go with the 406"

    Zip.
    X2

  4. #4
    hey guys... thanks for the quick responce... i was leaning towards the 406... but do you think it san stand 7200 rpm... i'm running a 32 inch tall tire turbo 350.. bo brake and 5;13 gears ... thanks caveman.......

  5. #5
    Senior Member MASTER BUILDER TheEngineer's Avatar
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    There's no replacement for displacement, so a SBC with 400+ CIs is the way to go! Additionally, I believe a broad power-band in a car like your's (typically with a Power-Glide) is also very important. So, a 4" stroke crank will help with that.

    FYI, my SBC 427 stroker with 4" crank will easly turn 7500, but I typically shift it at 7200 bracket racing.

  6. #6
    Senior Member MASTER BUILDER TheEngineer's Avatar
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    Quote Originally Posted by TheEngineer
    There's no replacement for displacement, so a SBC with 400+ CIs is the way to go! Additionally, I believe a broad power-band in a car like your's (but typically with a Power-Glide) is also very important. So, a 4" stroke crank will help with that.

    FYI, my SBC 427 stroker with 4" crank will easly turn 7500, but I typically shift it at 7200 bracket racing.

  7. #7
    Senior Member MASTER BUILDER
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    Quote Originally Posted by TheEngineer
    There's no replacement for displacement
    You know it!

  8. #8
    Senior Member EXPERT BUILDER
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    406

  9. #9
    ok... what compression would you run?? dome or flat top?on 383 or 406? thanks in advance.... caveman :? :? :?

  10. #10
    Senior Member EXPERT BUILDER
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    id run a dome with around 13-14:1 if it just gonna be a race car id run some afr heads as well


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