One of the premier Harley Davidson machine shops in the USA, Short Block Charlie’s specializes in performance head modifications and engine building. We are located in Tempe, Arizona, and have a summer facility in Montana. We are a Sunnen machine shop with the latest equipment available. Calls us or send us an email!

There have been design and procedure changes in our cylinder head program during the past 5 months. From port finishes to our NEW CNC valve seat machine, and computer soft-ware. These changes we put us one step ahead of our competitors in this industry.

INTAKE PORT FINISH

Over the past 5 months we have changed the surface finish on our intake port runners. Rather than employing the standard sanding roll finish we now use a DIAMOND tool cutter to secure a finish which dynamically enhances the air flow and air velocity through the intake port.

Computer Soft-ware

We have purchased soft-ware which assists the optimum design of ports. We can now simulate the air flow through a given port. With this program we can change port shape, valve seat angles and obtain an accurate reading of what these theoretical changes will yield in both physical air flow and port velocity. This soft-ware can duplicate both swirl and air tumble situations. An added benefit is that we have a 3-D snap shot of ports and combustion chambers rather than a linear reading.

CNC Profile Editor

CNC MACHINED VALVE SEATS

Our NEWEN B-B CONTOUR valve seat machine, purchased in August. Employs machine and the Port-Flow soft-ware which allows us to transfer air flow simulation into reality to design and cut any type of valve seat profile imaginable. With this machine one designs the seat angles on CAD present this data to the machine and a CNC machine valve seat is cut with a single point CBN cutter blade. The finish and angles are with in .0001 accuracy to blue print.

Results

This combination puts us in a unique position among our competitors.  We have raised the bar in cylinder head porting.  Our drastic changes in air flow numbers and port velocity has resulted in more torque and horsepower on the dyno runs.

SBC TRUCK

SBC CUSTOMER SERVICES

CYLINDER HEAD PORT VOLUME SHEET

CYLINDER HEAD BASELINE PROCEDURES

Coming Soon!!

• Super Flow dyno tuning center

• Twin Cam electric compression release installation kit

• Timken Bearing install kit, 03 engines and newer

• Pro 1 Racing Heads

SERVICES