what timing can i give to a shevy silverado 2005 5,3l I live in belgium europe and we have 98 octane of fuel over here (always) and i just purchased the hp tuners program I know on the old cars with maual timing icould advance the timing with 6to 7 degrees whithout a ping and there whas abig diference in drivebilety and performance
does anyone have any experiance or sugertions