Originally Posted By: A_Harman
Originally Posted By: dave1251
Look at GM'S engineering of the Corvette V8 and the maximum amount of pressure is 180,000PSI for max lobe/lifter interface. This was the rule of thumb for GM going back to the 50's.
Where did you hear this number? I have worked with GM on various valvetrain projects over the past 6 years, and they do not allow sliding contact stresses this high in production engines.
A_Harmen I would like to provide my sources, but rest assured that neither are in good standing with GM especially both are quite frank and both have I do not care attitude. But the information is available. A lot "OEM" parts makers that provide parts for older GM V8's like to advertise this standard also.
Originally Posted By: dave1251
Look at GM'S engineering of the Corvette V8 and the maximum amount of pressure is 180,000PSI for max lobe/lifter interface. This was the rule of thumb for GM going back to the 50's.
Where did you hear this number? I have worked with GM on various valvetrain projects over the past 6 years, and they do not allow sliding contact stresses this high in production engines.
A_Harmen I would like to provide my sources, but rest assured that neither are in good standing with GM especially both are quite frank and both have I do not care attitude. But the information is available. A lot "OEM" parts makers that provide parts for older GM V8's like to advertise this standard also.
