ok what is the difference between a short block, long block, big and small block? - Team Camaro Tech
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post #1 of 15 (permalink) Old Feb 6th, 05, 03:48 PM Thread Starter
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I see the terms thrown around alot, but don't really now the difference. I assume that a sbc is anything that is below some arbitrary cu inch amount(400).
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post #2 of 15 (permalink) Old Feb 6th, 05, 03:54 PM
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short-block typically means w/o heads whereas a long-block generally means w/heads and manifold if im not mistaken. sbc = small block chevy generally.

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post #3 of 15 (permalink) Old Feb 6th, 05, 04:12 PM
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Welcome Camaro&HogMan, kick off your shoes and stay awhile. [img]smile.gif[/img]


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post #4 of 15 (permalink) Old Feb 6th, 05, 04:18 PM
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OK thanks for the welcome imma neby here too [img]graemlins/thumbsup.gif[/img]

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post #5 of 15 (permalink) Old Feb 6th, 05, 04:19 PM
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* Newby. dam wheres that spellchecker?

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post #6 of 15 (permalink) Old Feb 6th, 05, 04:31 PM
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Dawg,
Small Blocks and Big Blocks are two totally different engine families. The Small Block Chevy started out as the 265 in 1955 and grew up to the 400 in the 70's. It also includes most of the 80's and 90's "small blocks" such as the late LT1 and the Vortec engines up until 99. All of these engines are based on the same basic engine block, dimensions are all the same etc. With some minor exceptions, they are all interchangable.
The Big Blocks started out with the 396 and go all the way up to the latest 502's etc. They also share the same basic engine bolck and dimensions, with a few exceptions.

A "long block" refers to a basic engine with the heads on it. A short block is just the bottom half, with no heads.

Hope this helps explain it,

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post #7 of 15 (permalink) Old Feb 6th, 05, 04:37 PM
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the terms "short block" and "long block" refer to new or rebuilt replacements engines.
a short block is just a block with the crank and pistons installed- you have to put a camshaft, heads, intake manifold, and a bunch of other stuff on it to get it going.
a long block is a short block with a cam, heads, and maybe an intake manifold already bolted onto it.
a "small block"- in Chevy terms- is the Chevy family of V8's that were made from 1955 until present that range in displacement from 262 inches (4.3 liters) to 400 cubic inches (6.6 liters) as manufactured. these angines are no longer installed by GM in any new vehicles, but you can still buy new engines from GM. in new vehicles, they have been replaced by the "LS" family of engines like the LS1 in Corvettes. Chevy is going to put a 427 inch "small block" in the '06 Vettes, which is not to be confused with the 427 big blocks from decades past, which i will get to next..
a "big block" describes the family of Chevy engines made from 1965 to present that range from 366- 502 cubic inches and are physically bigger and heavier than the small blocks. you can still get the 496 inch (8 liter) in the new trucks.
the most popular big blocks range from 396-502 inches, with the tall deck truck 366 and 427's not being so popular.
as you can see, there is no real cubic inch cutoff point for small block to big block, but you can definitely tell a small block Chevy from a big block Chevy just by looking at them- unlike Olds, Pontiac, or Buick engines- which all look pretty much the same whether they are a 307 or a 455.
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post #8 of 15 (permalink) Old Feb 6th, 05, 04:38 PM
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dang.. Bill posted while i was composing my reply...

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #9 of 15 (permalink) Old Feb 6th, 05, 05:27 PM
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Its the fast typing [img]smile.gif[/img]

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post #10 of 15 (permalink) Old Feb 7th, 05, 01:55 AM Thread Starter
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thanks guys, appreciate the education
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post #11 of 15 (permalink) Old Feb 7th, 05, 02:27 PM
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Annnnnddd,, you may have heard of a fitted block. No crank, cam rods, just pistons , pins , rings in a new block... This is getting like Burger King.

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post #12 of 15 (permalink) Old Feb 9th, 05, 10:21 PM
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Let's not forget the crate-only BB 572!
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post #13 of 15 (permalink) Old Feb 10th, 05, 03:14 AM
 
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And believe it or not GM installed the very last of the original type motors with side motor mounts in a VAN what was it last year/year before last?? (Darn years are getting away from me??)......

SO the second type casting, original motor had one heck of a long production run....

1958 - 2003/4(????)

AND I still say GM obsoleted the greatest motor made!!!!!!

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post #14 of 15 (permalink) Old Feb 10th, 05, 08:29 AM
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they still put the "old style" big blocks in 3/4 ton HD and bigger trucks- the big 496 (or 8200 in Vortec speak) is essentially a tall deck big block with LS1 style heads on it. so the "old school" stuff aint totally dead yet.
it's progress and economics- the new gen 3 engines are simply amazing and are already in everything from big trucks to the Grand Prix and everything in between, so it makes more sense to use the same engine across as many platforms as possible.
i wonder how much longer before they start phasing out the crate motors and replacing them with even more potent LS derivatives and sell them with an oil pan that will clear any old chassis and generic motor mount adapters to make them a drop in install. 5 years-maybe?

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #15 of 15 (permalink) Old Feb 10th, 05, 10:05 AM
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Quote:
Originally posted by novaderrik:
they still put the "old style" big blocks in 3/4 ton HD and bigger trucks- the big 496 (or 8200 in Vortec speak) is essentially a tall deck big block with LS1 style heads on it. so the "old school" stuff aint totally dead yet.
it's progress and economics- the new gen 3 engines are simply amazing and are already in everything from big trucks to the Grand Prix and everything in between, so it makes more sense to use the same engine across as many platforms as possible.
i wonder how much longer before they start phasing out the crate motors and replacing them with even more potent LS derivatives and sell them with an oil pan that will clear any old chassis and generic motor mount adapters to make them a drop in install. 5 years-maybe?
It'll be a long time before they completely get rid of em, but I'd expect to see LS-derived motors with special distributors to utilize the new head designs and such on a computerless old-school type motor.

It would be really nice to see a 'hybrid' motor, using SBC mounts and patterns (for trans, accessories, etc), but using LS-type heads, internals, and block design (6-bolt mains and such).

Some kind of crank-fired or magnetic pickup ditributor since the LS style internals have no provisions to turn a classic type dist.

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