Quote:
Originally Posted by GRX
350 rockers on a 250 ... no can do. Distance from fulcrum/stud to valve tip is greater. That is why the ratio is different.
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alright
1.75 ratio is compulsory ratio not selectable from chevy engineer ?
but i see after market rockers for l6 250 in summitracing with 1.5 so what they are ??!!
in overall is my theory right about lower valve lift with lower ratio of rockers(my mean lower than 0.425 valve lift) and no need zddp or not ?