Hey guys,
I need a little help. Got a new build, running a 351w with Edel Perf RPM intake and heads, MSD ignition and dist, Comp cam (224 degrees and .501 lift on both int and exh). Road Demon 725 carb and then tried a Holley 600. Engine only has been run about three hours, including the initial breakin run and car has only seen about 40 miles of road time.
Problem is this: I cannot lean out the mixture and it seems that the cylinders are loading up with fuel that is seeping past the rings and into the
oil. I changed the
oil and the
oil was thin with a heavy odor of gas. The exhaust is blowing white to greyish smoke that reeks of the smell of unburnt fuel. The White smoke is not coolant as the water level has been constant. Tried the two above mentione carbs with no luck. On the Holley I lowered the Power Valve from a 6.5 to a 4.5 and I jetted down from 64's to 62's. Manifole Vacuum is between 11 and 12 and timing is set at about 13 degrees intitial. Fuel pump is an Edel mechanical and fuel pressure fluctuates between 6 and 7 psi.
My big concern is the oil pressure. When I changed the oild and then started the engine the next AM the pressure was between 50 & 60 PSI. Once the engine reached operating temp of 180 degrees the oil pressure dropped to between 20 and 25 psi and won't rise any higher.
I have seen posts regarding wrong oil filters, bad fuel pump diaphragm, or bad oil pumps being the culprit.
What is a good starting point?
Also, as for the oil filter, I don't have a remote system and the standard filter that the 351W calls for is too large to fit between the engine and the frame rails. The local parts guy told me I had to use a short filter and he sold me an STP 16. Is this the correct short filter for my engine?
As for the fuel pump being an issue, I have twice had to change the gasket at the pump due to a small leak that appears to be coming from the between the flange and the timing case cover. However, this morning I noticed oil on the top of the fuel pump and I could not detect any leakage at the pump to timing cover flange. I don't know where the oil is coming from. Could it possibly be coming from within the pump indicating a blown fuel pump diaphragm?
Any help would be deeply appreciated.
Tony
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