i have a 4.8l block and was curious as to if it could be built into something bigger?

 

up to a 5.7 i believe

 

X2 I also believe it can be punched out to a 5.7, but not 100% someone will correct me if im wrong im sure.

 

Nope, you can built a 383 out of them,

Bore to 3.905" and 4" stroker crank

 

didnt think about a stroker crank, but thats pushing the limit of the cylinder walls right?

 

4.8/5.3 blocks can be safely bored to 3.905. Its rumored that the blocks were originally designed to be turned into an iron 5.7 but they never did.

 

Iron 383 would be the way to go... 5.3 and 4.8 blocks are identical.

 

Sonic test first!

Make sure your machine shop sonic tests the block before machining anything. Not all blocks are perfectly identical. Case in point...my most current 5.7L build started with a 5.3L block and just with a stock LS1/6 99mm bore (3.898") my cylinder walls on #2 and #6 are at minimum wall thickness. On all the other bores I could have gone to 3.902-3.905" but since #2 and #6 did not allow it I was stuck with a stock bore, which is fine.

Also keep in mind that with the thinner walls, more heat will be transfered through the cylinder walls into the cooling system, so be 100% sure of your radiator size and efficiency with a fan.

 

Only with high revs will you be pushing anything to it's limits, but the bored over 5.3L block can handle a 4" crank rather well. No machining necessary if you get the correct rods.

 

ok well i have a 4.8 block, and im going the 383 route, so i need a 4" stroker crank and bore to 3.905, just having the machining done how much should i expect to pay?