Brian Crower Mitsubishi 4G63 Eclipse/Evo Single Spring & Titanium Retainer Kit BC0100
Your stock valve springs can fail in 3 different ways.
They can "bind" and get stuck, losing their ability to open and close the valve. This is an easily diagnosable failure. Depending on how it binds, it could cause failure to other engine parts.
They can "break" into pieces dropping the valve into the combustion chamber and consequently ruining your bottom end.
"Valve Float" is a hard to diagnose condition where the valve spring rate is not high enough to fully extend the spring and close the valve after a complete rotation of the cam before the cam comes back around again. So what ends up happening is that when the cam is spinning fast (high rpm) the valve never closes, and combustion leaks out of the engine, and the engine loses power.
Note: Spring Pressure: BC1100 Seat: 1.550" @ 84 lbs / Open: 1.000" @ 235 lbs / Coil Bind: 0.935" (no machine work required)
Car Make: Eagle Mitsubishi
Car Model: Eclipse Talon Evo 1-9
Seat Pressure: 1.550@84 lbs
Open Pressure: 1.000@235 lbs
Coil Bind: 0.935Applications: Mitsubishi 4G63 Eclipse/Evo
Part #: BC0100
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