pinking ,pre ignition and detination I assumed they where all the ??

it made 207bhp before I put the new head on it so its got good power for a 1.6cvh EFI


Ofab, 195, beiges, standard C.R kent35 uprated fuel pump and 60 psi fuel pressure and a CNC head from rick woods with over size valves

I even had the same problem before I fitted my fuel pump !
Im wondering if upping the fuel pressure could cause this ~????


forgot to mention it sounds like a rattle if that makes sense ?