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Help with 400sbc build
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Posted: 10/05/12
10:09 AM
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Building a 400 sbc. want opinions on what cam and accessories to use. 2 bolt main
Looking to put 215cc intake runner aluminum heads by edelbrock (victor jr's) Need some ideas on chamber sizes. Thanks
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68scott385
Enthusiast
| Posts: 622
| Joined: 05/09
Posted: 10/05/12
01:04 PM
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they come in two sizes, 64 & 70cc, the answer depends on what you're looking to get in the way of compression ratio
http://www.kb-silvolite.com/calc.php?action=comp
use this link to play with the numbers and get a good idea of how different changes affect the compression ratio
 
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pepsi1
Enthusiast
| Posts: 298
| Joined: 10/11
Posted: 10/05/12
08:50 PM
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welcome to Car Craft FireBirdJimm:
Jimm I'm "assuming" you are using your build for a street/strip application correct. 
Something to have fun with. Do you want that Rumpty-Rump sound of the "old muscle cars" Because you didn't mention what car you have, or what trans your using. With that said let me see if I can give you some options...  
Bob
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pepsi1
Enthusiast
| Posts: 298
| Joined: 10/11
Posted: 10/05/12
09:43 PM
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Jimm:
What type car
What application street-strip or both
Automatic or a manual trans
Rear gear ratio
How tall are your rear tires
I just looked through Jegs for cams, and they have enough to get get you going. Their cam kits are really inexpensive.
So let us know...
Bob
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Posted: 10/06/12
04:25 PM
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thats a good link Scott. i agree Bob, gonna need much more info for a cam recomendation. are we going hydraulic flat tappet, solid, roller? im gonna go out on a limb and guess were talking about a firebird?
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Posted: 10/14/12
05:45 PM
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I did a 406 for a buddy. .030 over, ft Kb pistons, 350 5.70" rods, stock oil pump,oil pan, RHS 215 cast iron heads w/72 cc chambers(approx 10.0 to 1 comp).500" summit cam 236*@.050", edelbroch rpm intake 750 vac sec Holley. it was in 85 chevy 1500 pickup that ran 13.0 @ 105mph on street tires! 2200-2400 stall 3.73 gears.. it's a torque motor, just extend the rpm range a little. on a budget, use stock type cast dished piston with vortech heads(64cc) and a cam with no more than .450" lift but with around 230-236 duration at .050" (1971-73 Lt1 cam)
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