Rothman

iTrader: (4)

Just wondering which parts from an LS-1 will not fit on the 6.0L block. Or will everything fit? Also if anyone knows how to figure the displacement between cylinder size and stroke it would be much appreciated.

Race Car Driver

Don't switch to an iron block unless you're adding 400-500 hp.

Ben R

Formula for Displacement:

bore x bore x stroke x number of cylinders x .7854 = Cubic Inch Displacement

If you use a 6.0L block you will have to drill and tap a hole for the alternator bracket. It's pretty straight forward.

Rothman

iTrader: (4)

by adding 400-500 hp do you mean on top of the baseline or total hp?

Rothman

iTrader: (4)

Also, why not the Iron block? From what I've read it's only around 80 lbs heavier, and If I go with a 427 heads cam N\A combo it should be bad ***.

strokedls1

iTrader: (1)

It adds about 100 lbs. He is talking about making that much power rear wheel total. If you go big displacement it is worth.

jrp

iTrader: (16)

to go 427 with the 6.0 block you'd need a 4.060 bore and 4.125 stroke. if you want 427 displacement i'd opt for the darton drysleeved ls2 or if you have the money go wet sleeve. the larger bore 4.125 will unshroud the valves and allow the heads to breath better. add the 4" stroke and your good to go.

otherwise i'd stick with a 408 using the iron block; 4.030 x 4.00

Rothman

iTrader: (4)

I hear nothing but horror stories about these re-sleeved engines. I know the ones that work, work great but the percentages of ones that seem to be failing are to substantial to ignore. That's why I was thinking about the iron block. Well, that and the fact that their dirt cheap. Is ther any other reason besides weight to avoid the iron block?

ArcticZ28

iTrader: (14)

Nope. The iron block is 65 pounds heavier, it's in the GM LS1/LS6 Performance book. I've always heard 80-100, but I just read that.

Rothman

iTrader: (4)

Yeah I have the same book and read the same thing but wasn't sure what to beleive since I've heard so many things.

strokedls1

iTrader: (1)

I have had both blocks and the difference is about 100 lbs. I have weighed the blocks. You could also look at the ls2 block if you don't want the weight penalty. I agree that the resleeve leave a lot to be desired in terms of leaking coolant.

dragonZ28

iTrader: (32)

I picked up the iron and aluminum shortblocks by hand, and the difference is much more than 60lbs.

ArcticZ28

iTrader: (14)

It definitely feels like it, I just find it hard to disagree with written (supposed) facts in a book. But if strokedls1 says he weighed it, I believe it. That MF'ers def much heavier and I also speak from experience.