What is an LS1?

[STATIC]

So, are 4.8L and 5.3L engines LS1's? Or is it just that they have LS1 blocks. Just looking for clarifacation!


THX, PHIL

[1BADC10]

4.8 (???) & 5.3 (LM7)- both use same blocks, different internals, different heads (I think)
5.7 (LS1) - block all it's own (more ci)
6.0 (LQ4/LQ9)- block all it's own (more ci)

I believe the external engine & accessory mounting design is the same b/t the 4.8/5.3/6.0 motors, but that LS1 (5.7) is definitely different. Someone else here can definitely point out more differences than I, but that should be the basics.

[trever1t]

Bore, stroke and head chambers vary but same external and most internals same. A cam from one will fit the other, etc.