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Old 27th-April-2007, 12:00 AM   #1
KEITH'S75CUSTOM
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bbc or sbc

i was just wondering what would be faster a small block or a big block pushing the same horsepower.
or a 400 big block vs a 400 small block

Last edited by KEITH'S75CUSTOM; 27th-April-2007 at 12:03 AM.
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Old 27th-April-2007, 02:21 AM   #2
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Why? do you have access to both of them?
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Old 27th-April-2007, 02:48 AM   #3
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if i had an extra 1000 bucks laying around id have access to one of them. i am just curious though
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Old 27th-April-2007, 06:54 AM   #4
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If both had equal HP the BB would still have more torque. If you have a heavy car and an automatic trans that would normally make it run quicker ETs. JMO, RM
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Old 27th-April-2007, 08:21 AM   #5
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If they had the exact same power levels? SB for sure. Less rotating mass, less weight.
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Old 27th-April-2007, 11:11 AM   #6
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Ideally you can get better flowing heads for big blocks (out of the box). So a 400small block vs. a 402 big block...so with similar builds, the big block would end up the leader, because with better heads it can breathe better and make more power.

But as per your question...it's a toss up.
IF they both make the same power, and they're both similar cubes, the outcome will end up being quite similar as well.
The big block uses longer rods and has a larger bore, while the small block is lighter weight and has a larger stroke.

Now, if you were comparing a 400hp 350 small block vs. a 400hp 454 then I would definitely say the 454 would win. It will be making LOADS more torque at all RPMS...not to mention 400hp is cheaper to get out of a 454 than a 350!
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Old 27th-April-2007, 11:35 AM   #7
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Well said!
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Old 27th-April-2007, 01:02 PM   #8
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Big Blocks are awesome, but they weigh more and are harder on the rest of your drivetrain then a small block would be.

Small Blocks are good enough for a street car though in my opinion. Look at what cars today are running. Its all about haveing the right combination of parts etc.

Build a 406 SBC, that should be enough for your needs. They can be built 500hp N/A add some juice and your 600-650hp area

You won't have any clearance issues with the small block either.
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Old 27th-April-2007, 01:12 PM   #9
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i would rather have a 383 stroker than a big block any day
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Old 27th-April-2007, 01:24 PM   #10
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Quote:
Originally Posted by nova_75_77 View Post
i was just wondering what would be faster a small block or a big block pushing the same horsepower.
or a 400 big block vs a 400 small block
almost sound like:

"WHATs HEAVIER A POUND OF FEATHERS OR A POUND OF BRICKS???????" LOL!

i think u would have to take into consideration the TQ rating also, but if both are the same HP/TQ, & in the same car. i think the small block, only cause of weight. just my .02 cents


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Old 27th-April-2007, 01:32 PM   #11
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a 400 BBC
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Old 27th-April-2007, 01:39 PM   #12
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a 400 BBC
im thinkin a bored 396, but correct if im wrong please......

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Old 27th-April-2007, 02:20 PM   #13
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I think a 1968 "396" was the only year the motor was ACTUALLY 396ci.

1969 and After "396's" were actually 402ci??

It was either 1969 or 1970 where Chevrolet lied about the actually cubic inches of the "396 "motor.

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Old 27th-April-2007, 02:26 PM   #14
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I have had several nice small blocks and they were fun. I'm on my first BB now though and I must say I am sold on BBC's. I doubt I will ever build another small block.

Any of you guys that don't want big blocks just send your bb parts my way thanks.
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Old 27th-April-2007, 03:20 PM   #15
KEITH'S75CUSTOM
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Quote:
Originally Posted by LIL NOVE View Post
im thinkin a bored 396, but correct if im wrong please......

JOHN
yeah thats what i had in mind. or theres always the olds 400 CI bb but thats not a chevy
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