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Thread: 400 sbc build???

  1. #1
    Senior Member SENIOR BUILDER
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    400 sbc build???

    im bout to start on the rebuild of my 406 sbc anybody have any tips for makin good power on one??? its gona be a street motor in a 86 gmc swb

  2. #2
    Senior Member RACING JUNKIE
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    200 shot of nitrous. :shock:
    ***IN GOD WE TRUST***

  3. #3
    Senior Member RACING JUNKIE
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    Dart pro one heads, good set of pistons, a sfi balancer, cam is depending on the budget.... well for that matter so is everything?

  4. #4
    Senior Member RACING JUNKIE
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    Re: 400 sbc build???

    Quote Originally Posted by justin45
    im bout to start on the rebuild of my 406 sbc anybody have any tips for makin good power on one??? its gona be a street motor in a 86 gmc swb
    That is kind of a loaded question, we really need more info on what your intended purpose is and what you've already got.

    Is it a weekend warrior for bracket racing, a pulling truck, mud truck etc?
    Are you wanting more torque or just upper RPM horsepower or both?

    In general a good set of flat tops, some good breathing heads, a 280 magnum cam, a performer RPM air gap and holly 750dp would wake it up nicely.
    ***IN GOD WE TRUST***

  5. #5
    Senior Member RACING JUNKIE
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    It's a budget thing, it depends what you want to spend or can afford too spend, Dart steel heads are about $700.00 good heads for the street or racing (you will have to drill the steam holes in the heads if you do a lot of street driving) decent cam, intake, carb and headers and you're looking at around 450 HP, all for less than $2,000.00 in parts.

    JMO

    Zip.

  6. #6
    Senior Member DYNO OPERATOR
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    IF YOU RACE IT,MY 406 ENGINE COMBO MIGHT GET THAT LIGHT S-10 INTO THE VERY LOW 10'S TO MAYBE MID NINES ON MOTOR.THIS IS A FLAT TOP PISTON MOTOR.

  7. #7
    Senior Member SENIOR BUILDER
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    well its not gona be raced much and i want to have bout 10:1 compression so i can run pump but i was thinking bout getting 5.7 rods wth flat tops and 2.05 valves wth a big roller, im planning on using the stock heads and crank but im thinking but offgrinding it to stroke it and im not to sure what im gonna forsure do to it yet but i ana build it on a low budget

  8. #8
    Senior Member DYNO OPERATOR
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    Quote Originally Posted by justin45
    well its not gona be raced much and i want to have bout 10:1 compression so i can run pump but i was thinking bout getting 5.7 rods wth flat tops and 2.05 valves wth a big roller, im planning on using the stock heads and crank but im thinking but offgrinding it to stroke it and im not to sure what im gonna forsure do to it yet but i ana build it on a low budget
    i have a used cam for sbc 265-400 cid,i took out of my 406 early this year because i had a new solid roller cam,new heads,intake&carb installed.im trying to sell all of it if your interested.engine builder said the cam and valve train looked good.cam is a hydrulic comp cam #12-250/grind#cs xe284h-10.
    240/246@50 507/510 lift,carb is aed 750cfm,dont know manufacture of roller rocker arms but they are purple and 1.5 ratio.push rods are comp cam.lifters are comp cam.also have a open plenium intake.this combo with a set of proline heads took my pump gas 3500lb monte carlo to a best time of 11.60 in the 1/4 mile on m/t drag radials.you can have it all for $400.00.if you need pic's let me know and i can e-mail some to you.and yes i did drive the car on the street.

  9. #9
    Senior Member SENIOR BUILDER
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    the cam is to smal but how much would u want for the lifters and rocker arms and what kind intake is it?

  10. #10
    Senior Member RACING JUNKIE BEAST477's Avatar
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    Quote Originally Posted by JEFF69Z28
    Quote Originally Posted by justin45
    well its not gona be raced much and i want to have bout 10:1 compression so i can run pump but i was thinking bout getting 5.7 rods wth flat tops and 2.05 valves wth a big roller, im planning on using the stock heads and crank but im thinking but offgrinding it to stroke it and im not to sure what im gonna forsure do to it yet but i ana build it on a low budget
    i have a used cam for sbc 265-400 cid,i took out of my 406 early this year because i had a new solid roller cam,new heads,intake&carb installed.im trying to sell all of it if your interested.engine builder said the cam and valve train looked good.cam is a hydrulic comp cam #12-250/grind#cs xe284h-10.
    240/246@50 507/510 lift,carb is aed 750cfm,dont know manufacture of roller rocker arms but they are purple and 1.5 ratio.push rods are comp cam.lifters are comp cam.also have a open plenium intake.this combo with a set of proline heads took my pump gas 3500lb monte carlo to a best time of 11.60 in the 1/4 mile on m/t drag radials.you can have it all for $400.00.if you need pic's let me know and i can e-mail some to you.and yes i did drive the car on the street.
    You guys need to pm each other. This is not the classified section.
    BEAST477






    Only a rich man can afford to use cheap parts.

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