I was in school to day in the bomb lift shop and got bord and only had a pencel and paper and was try ing to figure out the most stroke I could get in my small block.
I was thinking crazy, Useing my stock 89' flat taped lifter 5.7L 9.025'' deck block I started doing the numbers and the biggest stroke I could get was,
I was thinking, get a 3.850 stroke crank and off center grind(.025'')it for another .050'' of stroke.
3.900" keeping the piston hight over 1" with 6.000'' rods.
I could use an easy to find off the shelf 1.000" forged piston and and have the piston .030'' below the stock deck hight . So there would be plenty of room if I needed to take .010 or 0.015 off the deck. Or add a little more stroke.
4.040'' bore X 3.900'' stroke = 395.8 cu.in.
4.030'' bore X 3.900'' stroke = 394.8 cu.in.
With grinding the block and takeing a little off the rods would I make enought room for the 3.850'' stroke crank ground to 3.900''?
If it the pistons can clear the crank with the 6'' rod in between then I shouldn't inter fear with the crank, but I might be wrong.
Any ideas on what I could do?
I put this over in advanced tech too, but not a hole lot of people view that stuff.
I know the answer is part fact and part opinoin.

 

I really don't think it would work at all. You would have to grind out a lot of meterial at the bottom of each cylinder wall and around the oil pan seal area.

You could however cement the bottom half of the block and that would give yo the opritunaty to grind away at the cylinder walls without getting worried about hitting water jackets.

As for the pan, I have no idea how you would get around that.

I've heard of people building 396's and such but I have no idea how they did it.

I played it safe and stuck to something that has been proven and tested for years. I built a 383!

 

The people that build 396 sbc's use a 3.875'' stroke crank and a block bored to 4.060''.
If nothing else I turn it into a 383+, I'll bore it and use a 400 crank with 350 mains off center ground.