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Ted (5/21/2016)
charliemccraney (5/20/2016)
I watched my in truck video during the last pass I made, paying attention to the oil gauge. The pressure drops a lot, not slightly, by the time I'm at the end of the track so that is something I will have to resolve before I race again.
I installed a gate, made out of piano hinge, on the baffle. Maybe that is not allowing oil to flow as well back to the pickup. Will get a pan gasket set and check things out. Charlie. As long as the oil pan gate door swings to the back, you should be good in that regard. How many quarts of oil do you carry within the pan including what’s in the filter?
Ted, you asked this in http://forums.y-blocksforever.com/Topic119711-1.aspx, so I'll start a new thread to answer and hopefully resolve the issue.
The gate door does swing to the back. I normally run 6 quarts total, according to the shop manual.
In addition to the high rpm drop, which is significant, I notice that the pressure starts to flutter at about 2300rpm. This is consistent whether the oil is hot or cold but of course, the pressure is higher when cold.
I did add a quart, for 7 total. It changed nothing with the flutter and there is not a good place to test the higher rpm aspect close to home.
The plan is to pull the oil pan to verify pickup clearance, 1/4" to 3/8", try to devise a way to observe that the gate is working properly or remove it altogether for testing, the factory baffle will still be in place, and try an additional quart or two.
Here's the post about installing the gate, http://forums.y-blocksforever.com/Topic1469.aspx?. Looking back at that, I may need to trim more off of the baffle. It was designed for low rpm street use, so it's possible it doesn't allow enough flow back to the pickup in performance situations. Also possible is without additional clearance under the baffle, there is not enough surface area for the oil to open the gate as effectively as I thought.
Lawrenceville, GA
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