- Is it optimal, in terms of airflow volume and velocity improvements to take more material out of the upper portion of the intake ports on both the head and intake manifold?
- Is deshrouding the valves out to the cylinder wall beneficial in the turbo application?
- With a 5-angle valve job, what kind of back cut would be optimal on the valves?
- Is a land-to-face radius on the exhaust valve wothwhile for the turbo application?
- From what I've read, it might be wasted time enlarging the ports to a gasket when airflow typically sticks to the upper portion of the port.. so is just making the side and lower edges of the port clean and square (on both the head and manifold)?
- Does it pay off to leave a bit of a ridge (~ 1/8") at the bottom of the intake port on the head side in order to reintroduce fuel into the upper airstream?
Seems that the most gains are to be had by raising the upper portion of the port and taking out as much material from the port opening on back.
- Is it true that if you open up the ports to the gasket, that despite them being physically bigger, they consequently lose velocity?
- Are the exhaust port/valve face coatings available from Techline or somewhere similar?
thanks for any insight,
- Is deshrouding the valves out to the cylinder wall beneficial in the turbo application?
- With a 5-angle valve job, what kind of back cut would be optimal on the valves?
- Is a land-to-face radius on the exhaust valve wothwhile for the turbo application?
- From what I've read, it might be wasted time enlarging the ports to a gasket when airflow typically sticks to the upper portion of the port.. so is just making the side and lower edges of the port clean and square (on both the head and manifold)?
- Does it pay off to leave a bit of a ridge (~ 1/8") at the bottom of the intake port on the head side in order to reintroduce fuel into the upper airstream?
Seems that the most gains are to be had by raising the upper portion of the port and taking out as much material from the port opening on back.
- Is it true that if you open up the ports to the gasket, that despite them being physically bigger, they consequently lose velocity?
- Are the exhaust port/valve face coatings available from Techline or somewhere similar?
thanks for any insight,