What valve springs should I run?
Valve springs should generally be chosen based on compatibility with the camshaft style and pattern that you plan on using. The chart below lists general guidelines that will help you to decide which spring to run based on pressure requirements for different types of camshafts. Your valve springs must also have a coil bind clearance of at least .060” over the peak lift of the camshaft that you are planning to use. All fully assembled cylinder heads offered by RHS® will show maximum valve lift in their respective tech sheets.
Also, if you are looking at running a set of beehive springs, you’ll note that they typically will have lighter open and seat pressures than comparably rated conventional springs. By far the best way to choose a set of valve springs is to go with your camshaft manufacturer’s recommendation after first verifying that the valve springs will satisfy your cylinder head’s spring pocket diameter and installed height requirements. You can also get help with a valve spring recommendation by either Emailing us or contacting RACING HEAD HELP at 877-776-4323.
General Valve Spring Pressure Recommendations*
|Camshaft Type||Seat pressure (pounds)||Open pressure (pounds)|
|Hydraulic and solid flat tappet||100-130+||270-350+|
|Solid roller (street pattern)||150-180+||450-600+|
|Solid roller (race pattern)||190-300+||600-1000+|
*General guideline only –consult with your camshaft manufacturer for an exact valve spring recommendation, or contact RACING HEAD HELP™ at (877)776-4323 to verify valve spring specification based on application. Racing Head Service® assumes no liability for engine damage due to improperly chosen valve springs.