Thought i'll add a few pictures here just for fun.
The first is a stock used head. Showing the bowls behind the valve seats, both on the intake and exhaust side. Look how the seats are not blended with the bowls due to machining tolerances. Watch the exhaust port how carbon builds up due to turbulence where the seat steps down to the bowl.
Next is after the head porting and polishing is done. Intake left rough, exhaust ports and combustion chamber is polished to avoid carbon buildup as possible. Seats are not yet recut, and head is not decked yet.
Third is the finished product, head decked for increased compression; valve seats recut; valves installed, lapped and shimmed to proper tolerances with the reground cams - all ready to install.
These with the intake mods, exhaust and an ecu flash bring roughly 58-60hp with more power everywhere in the power band.
Last edited by Oyabun; 04-06-2019 at 10:35 AM.