A Typical BOPORT 5 angle Valve Job Prior to blending

The current main focus of Boport Racing Heads is airflow. As a service, I do offer additional machining to compliment the portwork I do. These machining services are not offered without the minimum of Stage 1 porting.

I work very closely with a performance automotive machine shop that performs machining on all of my head work. Together we have developed machining practices to meet my strict demands for precision and quality. We have spent countless hours developing valve seat and valve profiles to accentuate the cylinder head airflow that I produce. The valve seats and valve play and important role in air flow and charge motion as it enters the combustion chamber. The valve seat shape and it's transition into the port can literally make or break a port's flow. I have developed a combination of valve seat profiles for a variety of heads through countless hours of flow testing. I highly recommend that you allow us to machine the valve seats in your head for the maximum flow potential of the ports that I develop.

We do not use stones to grind valve seats, which is a common practice among typical machine shops. It is a fast and inaccurate way to machine seats and utilizes technology from the 70's. My seats are machined on a $30,000 Sunnen VGS 20 machine, using custom developed Newen cutters. There is no comparison to stone ground seats in terms of seat concentricity, repeatability of seat depths and profiles from cylinder to cylinder. This tooling ensures a perfect valve seal right from the get-go as well as equal flow characteristics from cylinder to cylinder.

This process is time intensive, and you will notice the price for this machining service may be a bit higher than what your typical machine shop charges. Hopefully you understand that there is a difference, and you get what you pay for.

Machining Services
Seat cutting (valve job) includes disassembly of your head, jet wash cleaning, glass bead cleaning, magnaflux inspection for cracks, full head check-out for wear and straightness, custom seat machining, thorough cleaning, establishment of installed heights and finally re-assembly of the valves, springs and retainers originally removed from head.

2.3 Ford with stock valve size -$175
2.3 Ford with oversized valves -$225

We also offer high lift roller cam head set-up for an additional fee. Price for establishing proper geometry and HLA shimming for cam clearance is based on shop labor rate of $65/hr. This operation is typically performed in under 2 hours if the supplied parts are in spec.

Solid lifter conversions can be performed as well at an additional fee. Please contact me regarding pricing.

Other machining services are available, please contact me with any questions you may have.