Differences between 4.8L, 5.3L and 6.0L

[MKader17]

I know that pretty much any mod from the 4.8 will fit the 5.3 wil fit the 6.0 and all combonations, but what are the different internal components that stop a person with a 4.8 from just boring and stroking (whatever is neccessary) to obtain the 5.3 or 6.0.

My question sparks from seeing plenty of people swapping out the 4.8/5.3 to the 6.0 and I figured if a simple rebuild with bore and stroke were possible somebody would already be doing it.

If this question has already been answered I'm sorry, I searched but couldn't really find anything.

Kader

[RedHeartbeat]

The engine block bore is the same for the 4.8/5.3 only the crank and rods are different, shorter stroke. The 6.0L has two configurations, low compression LQ4 and high compression full floating pistons in the LQ9. The 4.8/5.3 engine doesnt have enough wall thickness to handle being bored out to 6.0 without being sleeved. By that time its cheaper to buy an LSx block. I haven't heard of anyone putting a 4.8 crank into a 6.0 block to make a high reving engine.

[AdioSS]

it only makes sense to destroke an engine if you have to meet class displacement limits.

[MKader17]

The engine block bore is the same for the 4.8/5.3 only the crank and rods are different, shorter stroke. The 6.0L has two configurations, low compression LQ4 and high compression full floating pistons in the LQ9. The 4.8/5.3 engine doesnt have enough wall thickness to handle being bored out to 6.0 without being sleeved. By that time its cheaper to buy an LSx block. I haven't heard of anyone putting a 4.8 crank into a 6.0 block to make a high reving engine.

How does the 6.0L compensate for the thickness without going to a new block. I don't know too much about engines but it seems the only way to have thicker walls is to space the pistons farther apart. Which would mean a slightly longer block and probably a different crank and camshaft as well....

[RedHeartbeat]

they cast a larger bore into the piston liner area on the 6.0. The 6.0 block is a different block than a 4.8/5.3 block. The 6.0 block can be bored out +.030" larger to make it a 4.030" bore, too. The 4.8/5.3L block can be bored out to fit an LS1 piston up to 3.905" bore making it a 5.7L if you have that done.

[AdioSS]

a longer block is not needed. It could help, and I could see it happening in the future (like the NASCAR R07) but that is unlikely.

The old 400 block and the LS7 each had a 4.125" bore. The OLD 267 SBC had a 3.5" bore. THey all share the same bore center to bore center distance of 4.400 inches. It is possible to get a bore up to 4.200" but things get hairy around there.

[thunder550]

The 6.0 block can be bored out +.030" larger to make it a 4.030" bore, too.

I've actually heard that a 6.0L block can be taken as far as .080" over, but I've never seen it.

The 4.8/5.3 block bored to accept an LS1 piston and with a 4.00" stroker crank will make a 383...not too shabby for a block you can pick up for $100 or so.