Posted by MLPANKEY on July 19, 2013 at 17:44:13 from (98.68.178.10):
In Reply to: Oil posted by buickanddeere on July 19, 2013 at 16:35:23:
I agree with buick and deere oil viscosity should be looked at and only looked at in ensuring a good oil wedge is developed when performance clearances have been used on main and rod bearings . Usually needs a higher volume pump to. I haven't seen a tractor engine come in my shop yet with performance clearances until it leaves my shop either though .Most of them that arrive at my shop takes a breaker bar to turn the crank with no rods/pistons connected and they just cant figure why it doesnt run well lol. Before it leaves my shop they can turn the crank with one hand grasping the snout of crank. As for zinc well I never read a oil label to date to see what the zinc quantity is or isnt. On a solid lift cam I do use cam breakin lube everytime . I have cams, solid lift cams with .320 lift on the cam mushroom lifters for a agressive ramp profile with 1.85 rockers you can figure the net valve lift .Valve train is light so it doesnt take over a 920 or 944 comp spring with 120 lbs on seat. Valve springs spring rate and not breaking a camshaft in properly will be more detrimental to a camshaft than zinc or no zinc will matter in my humble opinion
This post was edited by MLPANKEY at 17:56:54 07/19/13 4 times.
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