Thread: 5.3L V8 gas?

Originally Posted by chad27

without turbo, supercharger, i dont think 93 will make enough diff to outweigh cost

The LS4 has a 10.0:1 compression ratio. Without premium it is pulling quite a bit of timing to prevent knock.

Originally Posted by Sabrewings

The LS4 has a 10.0:1 compression ratio. Without premium it is pulling quite a bit of timing to prevent knock.

dont listen to anything other than this. any less than 91 will cause significant knock.