Porting LS 862 Heads for Velocity
Porting to improve flow while maintaining decent port velocity for the 4.8 Turbo build.
Castings: 2002 862 upgraded to Factory LS1 2.00” Intake valves and 1.57” stainless steel exhaust valves. Fresh 5 angle valve job and surfaced .030”
Bowl cut/blend
Guide boss reduction
Rocker stud lump reduction
Port clean up
Leaving both the Swirl Ramp and rocker stud bump to control port volume. Looking for 205-210cc intake volume.
80-83cc Exhaust volume.