Quote:
Your theory of lower ratio means lower lift is correct, but that will not negate the need for proper break in lube. The cam to lifter is the critical problem area and that will be under high pressure no matter what. You have to have some valve spring to make the motor run. A better bet would be to use stock springs for break in then upgrade the springs if desired
|
break in for 20 minutes of first runing need but my means is
if we have lower valve lift ratio than 0.425 then we need lower pressure springs so with low pressure springs and low lift no need to add zddp additive for every change of engine oil
anyway if i use recommended springs for 0.500 lift then if i use sj oil again need to add zddp or with sj grade oil no need ? in iran all grade availble
sc sf sg sj sl sm sn
someone tell me if you use sj oil in engine with high lift cam and high pressure springs no need to use zddp but if you go on sl sm sn oil grade then zddp is important to add to your engine oil is this true ?
in iran zddp additive unavailble for this reason i talked about this subject
overall we cant change 250 rocker arms for lower ratio no problem i got it