Time to work on your Engine to increase performance?
OPTION # 1 – THE 1397 ‘BUSA PACKAGE (84 MIL)
- Mildly Ported Head
- Two Intake Cams
- Optional: Power Commander or ECU Mapping
Option # 2 – The 81 Mil
- Drop in Piston Kit
- Uses the Stock Block
- Z Intake Cams
Option # 3 – Special Crank
- Weld Up & Install Custom Crank
Other options are available including
- Throttle Body Conversions for Custom Nitrous Kits
- Full Blown Cylinder Head Conversion
- Oversize Valves and or Springs
- Street / Strip Porting
Cylinder Head Porting Defined
Porting is basically opening up, re-configuring and re-surfacing the ports of a cylinder head. Why port a cylinder head? The simple answer is to let the engine breath easier and more efficiently and therefore produce more power.
Cylinder head ports fall into two basic designs; the Straight Shot port and the High Approach port. In a Straight Shot port, the design allows for a line of sight from the inlet directly to the front opening of the intake valve. Sometimes this design gives a lower flow value but because it is straight, we attain higher velocity of fuel/air entering chamber. It also creates a turbulent spin or swirling in the combustion chamber, yielding a more efficient and more complete burn.
A High Approach port is where a turn is necessary in the port design. The term "high approach" comes from angle of the last section of the port relative to the valve - it is more in-line with the valve stem.
We take advantage of this to get a full volume flow path in the complete 360° circumference of the valve. Making a turn to an airflow is problematic but we caress the turn - making it as moderate and efficient as possible - to use it in our favor. The straight shot into the opening yields a fuller, more uniform flow around the entire valve curtain. The advantage is that the complete valve opening is used more completely.
Which approach we take is based on the original design of the head. For example, the 1986-1990 GSXR head uses a Straight Shot port while the 1991-1992 GSXR head tends toward a High Approach port. The Hayabusa head allows us to use parts of both for the ultimate hybrid design.