2000 green hornet

What is the difference between a small block and a big block motor? Is it something more than the size of the displacement of the combustion chambers? Does a small block or a big block have some type of advantage in the amount of power they make? Andy

hubes

the big block is basically a big small block, it can have a much larger displacement and can therefore make a lot more power, they also weigh more. the small block has a 4.4 inch bore spacing, whereas a big block has a 4.84 inch bore spacing. also the old small blocks had a deck height of 9.025 inches, and the big blocks have either 9.8 or 10.2. the new gen 3 and gen 4 small blocks have a 9.24 inch deck height. hope this helps

AU N EGL

Arn't most of the new Chevy LSx small blocks aluminum vs the big block is cast iron? Big weight difference.

hubes

you can get aluminum big blocks, but theyre expensive, oh, and btw, it would be awful hard to put a big block in a C6 if thats what your thinking

jschindler

So what would be a big, big block?

Yeah, I guess a 540 or 572. Maybe something from Sterling!

Sorry, I just had to bust your ***** over that one!

Mr. Lucky

Already been done:
http://forums.corvetteforum.com/showthread.php?t=923437

Mr Mojo

If I'm not mistaken, the 427 Andy refers to is still a small block.

Also World Products has a 454 small block.

clem zahrobsky

the big difference is the external diamentions because even the 7.0 liter gen III engine is considered a small block because the external diamentions are the same as the 5.7 liter use in the C-5 corvettes