what kinda rpms could an STOCK opel motor take, valve springs, ect? I have only reved mine to the factory redline (6100rpms)
As soon as the cam profile is changed, or valve sizes are increased (heavier valves) then the rpm limits are changed for a given valve spring pressure. What cam are you going to use? Solid or hydraulic?BetaCarotene said:so on the 2.0 im building......the stock valve springs can handle 6500 safely? also there will be a custom cam involved
what kinda of rpms could valve springs with 210lbs take. Im looking for somthing to rev to about 7500rpmsRallyBob said:You'll be borderline with stock springs (late model springs are 180 lbs). I'd try to get something with 210 lbs or so. Early springs are not sufficient at all (150 lbs).