This was in the regular Mustang forum, should have been here. Sorry guys....
Hello, I'm working on a '65 Mustang with a 302 engine, somewhere between 380-400 horsepower, (performer rpm cam, intake and heads, 9:5:1 compression), Holley fuel-injection. Engine has about 500 miles on it, and is built on a Jasper class II shortblock, (i.e. - it was built by someone who knew what they were doing
I'm trying to find an oil burning problem. The engine doesn't throw any blue on start-up, but will gradually start to blow blue smoke out one pipe as the engine warms up. It didn't do this after it was built. Sometimes the smoke is just a little, sometimes it is a lot. I can really get it going sometimes by turning on the air-conditioner and loading it down at idle. I've added an oil/air separator to the PCV system, with little change. Which valvecover should the pcv/oil/air separator be in? I'm pulling about 14 inches of fairly steady vacuum with the fuel injection, which is pretty good for such a radical camshaft. I'm running 15w-50 mobile 1 performance synthetic for oil. Compression looked good across all of the cylinders when I last checked. I'm pretty easy on this engine, rev-limited to 6000 rpm, never race. Just like to cruise around town every so often.
My current ideas are:
PCV issue
Intake manifold gasket.
I would really like to think that the rings are okay, if I had broken a ring, I should be seeing blue smoke all of the time, right? I should also see a drastic change in compression on that cylinder, correct?
Any ideas would be greatly appreciated!
- Eric