I've heard of a 427 small block. Does it really exist. Is there anything bigger in a small block and are they hard to find?

 

The biggest SB chevy made was the 400, Now when you include strokers, you can get 434ci. There are most likely other combinations out there, that I don't know about, and can't comment on. So I read this ? as if you were asking about chevy only.

Later
JOhn

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82 Firebird,355,Cam 224/234, .466/.488,TH350 Tranny,650 HolleyDP,Hooker Headers(I.E. POS) Manual steering
Best 8th et 8.62@80mph.
NEW for 01
A 408,dart iron eagle heads,street dominator intake, 750 SD,cam 229/239, .497/.520, Also a big hole in the hood.
Shooting for 12's.

 

The biggest small block I've seen was in Car Craft or Chevy High Performance a couple of years back. It was a 454 c.i. small block. They were trying to see if they could build a small block with the displacement of the legendary big-block 454.

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1992 Camaro Z28; Engine:383 w/Edelbrock RPM ported heads. Lunati Solid Roller Cam 224/232 .502/.502, Fluidampr, 1.5 Roller rockers, 30 lb injectors. Haltech E6GM DFI, SLP 1 3/4" headers, 4" Mufflex, T56, 4.10. Super Ram.

Mo steel for Mo stremph!

 

The biggest small block that was ever was a 468 CI made by John Lingenfelter using an olds rocket block

 

Actually i remember in an old issue of CC or HR someone had written in asking the same question, sort of anyway.
They were asking why noone runs a small block in pro stock as it seemed possible to make 500ci. They replied that a few years ago one of the big pro stock guys did in fact build a 500ci small block but they couldn't get the same power out of it as the BB based 500s. There just is no way to get the head flow you need to make pro stock HP in a small block paskage, despite the weight savings.
Then again, CC and HR have been known to smoke crack, but they did seem like they were serious.
...ed