If you're making over 30lbs of boost/drive pressure or over 3500rpm with your 1989-1998 Dodge 5.9L Cummins, Hamilton Cams 07-S-001 Beehive Valve Springs will help fix several negative things that you're experiencing. First, valve float, which can cause serious damage to the valvetrain. Second, intake and exhaust valves can be blown open by boost and exhaust drive pressure which allows reversion. Reversion can hurt your power potential by allowing exhaust gasses to enter the cylinder on the intake stroke. Inert gasses in the exhaust, when re-introduced into the cylinder shield the fuel particles from oxygen in the cylinder.
This does a few things that negatively affect power. It increases the time delay from start of injection to start of combustion, it decreases the maximum pressure and maximum temperature reached in the cylinder and it increases the total time needed to completely burn the available fuel. Correct valve spring pressure is a very important piece of power production.
Hamilton has seen 10-12 hp increases with customers changing their 60Lb. spring to their beehives. These springs will work well up to 5,000 rpm with moderate cams. If you are spinning over 5,000 with a healthy cam, and/or larger valves, then you need to look at going to the Hamilton Cams dual spring for safety and valve control.
- For Moderate Cams
- Work Well Up To 5,000 RPM
- Includes Beehive Springs, Retainers & Locks
Shipping Restrictions Apply This product can not be shipped to these states: CA
|YEAR ||MAKE ||ENGINE |
|1989 ||Dodge ||5.9L 12V Cummins |
|1990 ||Dodge ||5.9L 12V Cummins |
|1991 ||Dodge ||5.9L 12V Cummins |
|1992 ||Dodge ||5.9L 12V Cummins |
|1993 ||Dodge ||5.9L 12V Cummins |
|1994 ||Dodge ||5.9L 12V Cummins |
|1995 ||Dodge ||5.9L 12V Cummins |
|1996 ||Dodge ||5.9L 12V Cummins |
|1997 ||Dodge ||5.9L 12V Cummins |
|1998 ||Dodge ||5.9L 12V Cummins |