olds 455 rear main cap question

[1Bad4558]

Can someone explain to me how the rear main cap gets it's oil. The reason I'm asking is because I made me a baffle that bolts down under the oil pump that is gonna keep the oil from rising up the back of the pan under hard acceleration.

 

[jetsetw31]

I'm straining to see how anything bolted under the oil pump will work at all. Did you mean bolted to the oil pump bolt but, on top of the oil pump? Most baffles are part of the oil pan itself. The rear main cap is the first point of the oiling system. Roughly, the oil goes from the pump, to the rear main, to the block, the mains, the cam, the heads, and then back to the oil pan.
Olds has one of the best oiling systems in GM. The only weak point is that the oil pump is too good. The Olds oil pump's cover actually flexes under high loads. (The most popular fix is to double the cover for stiffness.) Most Olds engine builders put restrictors in the mains to slow down or limit the oil to the valve train and keep more oil in the mains so they live at higher power levels.

 

[jetsetw31]

Nope. The mains get oiled first. But in stock form, the pump over oils the valve train and takes pressure from the mains. Thats where the restrictors come in. They all do the restrictors Mondello, Miller, and Trovato.

 

[art]

I thought it (the oil) went from the pump up through the cap to the filter, then to the mains and the cam and lifters etc. I concur that most baffles are part of the pan or are hung off of the main cap bolts. I would be curious to see what you made. Got any pictures?

 

[1Bad4558]

My phone won't load the pictures. It's hard to describe but the baffle goes in between the oil pump and the main cap. It all bolts together with the oil pump bolts. The baffle sits right on the back of the pan.

 

[FE3X CLONE]

If you look at the picture below, there is a baffle that goes between the main cap and the oil pump. This helps to keep oil from sloshing up into the crank when accelerating.

The rear main cap gets it's oil directly from the oil pump. Oil enters the pump through the pickup tube and exits the pump directly into the main cap.

 

[1Bad4558]

Okay I made one similar to that. So there is no threat in obstructing oil flow to the main cap.

 

[jetsetw31]

That looks more like a crankshaft scraper.
Here is one for a sbo.

 

[jetsetw31]

As long as the part in between looks like the oil pump gasket, there should be no problem with flow.
T

 

[jetsetw31]

I thought it (the oil) went from the pump up through the cap to the filter

Your right. I forgot to add the filter.