Hello

Does anybody drive GSC S1 camshafts in his evo 9? I have installed two weeks ago new Billet S1 camshafts and know i have a tickering noise between 2000-4800rpm. When the engine is cold the car runs perfect and then when the engine gets warm the tickering starts. Now i changed the lifters but the problem is still here. I also checked the rod bearings and they are like new,

Regards

 

With the more aggressive ramp rates, they will make a bit more valve train noise. But an actually ticking is usually a lifter no pumping up. Even new OEM lifters have a tendency to tick.