Originally Posted by Robert AMG

The C32 has in tank fuel pump and with Jerry tune it didn't need any fuel mod, Afr is good in my car between 12 and 13 at max at 22 psi, and he can also lower it if i want to 11.5, but the 32 engine give his highest power at 13 AFR and it is safe in this engine, you can go to 13.5 and still safe.