hemiEssex
Active Member
In my 65 Coronet I have a 68 440HP motor. Bored 40 over, stock crank, iron heads, cammed, eddy performer manifold, headers and 3 inch exhaust. I purchased the motor mount kit from Schumacker as i did not like the way the previous owner had shoehorned the engine into the car. I purchased the mount kit, oil pan and pickup and trans adapter to run the new style tranny with it. I used 15/40 Rotella T oil in it after breaking it in on Breakin oil, draining it and added a Delco oil supplement to it. I drove it on its maiden voyage 900 miles. It worked fine all the way there. When I parked it and then fired it up again, i lost all oil pressure. After alot of hums and haws, a friend suggested that my newly installed Fram oil filter may be the culprit and to try and change it before tearing into the engine. I changed the filter and up came the oil pressure right away. So I brought it home and changed the oil and filter again and used a Mopar filter. Also for good measure I changed out the stock oil pump for a Mopar performance high vol pump just to make sure everything was good. On their website the pump is recommended for street and lightly modified engines. Now for my questions:
When I drive it at 2000rpms the pressure stays at 65-70lbs. When I punch it it drops drastically to 15 lbs and I can hear the valves start to rattle like they are starving for oil(I have only done this once to see how low the pressure drops) Am I sucking the pan dry with the hi vol pump? or could the pickup be plugged from the oil filter failure? It is coming on to winter here so I am going to pull the pan anyways to get a look at the pickup etc. When I am doing this I think I would like to install a deep sump pan, windage tray and pickup. Anybody think it could be something else?? Loose bearing tolerances? Oil passage blockage? I am stumped. At idle it maintains pressure at highway speeds it maintains pressure, is the oil getting foamy? is the pump going to bypass? The pan take 5 liters with the filter. Other than than the motor sounds good with no knocks or valve train noise, but I am worried that I am going to blow it up.
Any help would be appreciated. It is a street driven car, but i would like to give it the occasional poke down the drag strip when I feel it is running properly.
cheers
Steve
When I drive it at 2000rpms the pressure stays at 65-70lbs. When I punch it it drops drastically to 15 lbs and I can hear the valves start to rattle like they are starving for oil(I have only done this once to see how low the pressure drops) Am I sucking the pan dry with the hi vol pump? or could the pickup be plugged from the oil filter failure? It is coming on to winter here so I am going to pull the pan anyways to get a look at the pickup etc. When I am doing this I think I would like to install a deep sump pan, windage tray and pickup. Anybody think it could be something else?? Loose bearing tolerances? Oil passage blockage? I am stumped. At idle it maintains pressure at highway speeds it maintains pressure, is the oil getting foamy? is the pump going to bypass? The pan take 5 liters with the filter. Other than than the motor sounds good with no knocks or valve train noise, but I am worried that I am going to blow it up.
Any help would be appreciated. It is a street driven car, but i would like to give it the occasional poke down the drag strip when I feel it is running properly.
cheers
Steve
