stock timming gear set question.
08-10-2009, 11:18 AM
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stock timming gear set question. i read somewhere that the factory timing set is made to where when you install it dot to dot its actually 4 degrees retarded. that the gm did this for emissions or something. and that's why aftermarket cam usually have 4 degrees advance ground into them. is there any truth to this?
08-10-2009, 06:55 PM
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i read somewhere that the factory timing set is made to where when you install it dot to dot its actually 4 degrees retarded. that the gm did this for emissions or something. and that's why aftermarket cam usually have 4 degrees advance ground into them. is there any truth to this?