427w small block ford rev potential

[blykins]

Mark, just curious why you would say that? Because it's a 3" journal? I take 3" mains on BBF's to 8500-9000.

Although most guys are using 2.750" mains on Windsors these days, I would have no issue turning some rpm with a factory block either (until you make enough horsepower that the block destructs....)

[Mark O'Neal]

Originally Posted by blykins

Mark, just curious why you would say that? Because it's a 3" journal? I take 3" mains on BBF's to 8500-9000.

Although most guys are using 2.750" mains on Windsors these days, I would have no issue turning some rpm with a factory block either (until you make enough horsepower that the block destructs....)

The 3.000 Windsors get cap walk when you get much over 6,200. The Cleveland mains are fine....but it's no longer a Windsor block.

[blykins]

Originally Posted by Mark O'Neal

The 3.000 Windsors get cap walk when you get much over 6,200. The Cleveland mains are fine....but it's no longer a Windsor block.

I agree, as a whole, the factory blocks can often be found lacking. It seems it's a craps shoot though, as to which one will fail. I've seen 600+ hp factory block 347's and then I've seen 500 hp 347's split down the middle.

I've seen a few guys running 3.85" and 4" strokes on factory 351W blocks turning some rpms without issue, but I think the general movement for performance oriented builds has went toward the aftermarket blocks.

I was trying to remember if I had built any factory block Windsors turning some rpm, but none come to mind. They all are aftermarket block builds.