something went wrong with the engine in my plow truck so I found a low mileage replacement in the form of a 1990 305 from a c1500.
not being sure that the little 305 is up to the task of pushing snow and counter balance weight in a 3/4 ton truck, I've decided to put a bigger cam in the engine in hopes of bolstering performance all around. the nice thing about this is that the factory cam is SOOOO small, that it doesn't take much of a cam at all to increase performance through out the entire range.
FWIW, the cam I've chosen is a single pattern 204°/204° @ 0.050" lift (260°/260° advertised) and has 0.427" lift on intake and exhaust. this is a flat tappet engine. new lifters and appropriate springs are also part of the upgrade. this is still a small cam by just about anyone standards.
so, what do I use to break in the new camshaft at start up?
I've seen several break in oils available, but most of them are being advertised as containing no friction modifiers to aide in break-in. this makes sense for a full rebuild (not sure that I agree, but I it makes some sense), but for an engine that is all ready broken in except for the cam, I'm not sure that a oil without friction modifiers is really that good of an idea.
I'd prefer to buy the right oil, vs putting in an additive if at all possible.
the long term plan is to run it on a ZDDP rich oil for the remainder of my ownership.
any suggestions on specific oils to use?
not being sure that the little 305 is up to the task of pushing snow and counter balance weight in a 3/4 ton truck, I've decided to put a bigger cam in the engine in hopes of bolstering performance all around. the nice thing about this is that the factory cam is SOOOO small, that it doesn't take much of a cam at all to increase performance through out the entire range.
FWIW, the cam I've chosen is a single pattern 204°/204° @ 0.050" lift (260°/260° advertised) and has 0.427" lift on intake and exhaust. this is a flat tappet engine. new lifters and appropriate springs are also part of the upgrade. this is still a small cam by just about anyone standards.
so, what do I use to break in the new camshaft at start up?
I've seen several break in oils available, but most of them are being advertised as containing no friction modifiers to aide in break-in. this makes sense for a full rebuild (not sure that I agree, but I it makes some sense), but for an engine that is all ready broken in except for the cam, I'm not sure that a oil without friction modifiers is really that good of an idea.
I'd prefer to buy the right oil, vs putting in an additive if at all possible.
the long term plan is to run it on a ZDDP rich oil for the remainder of my ownership.
any suggestions on specific oils to use?