Originally Posted by miles
Got A 455 Olds Mounting A 871 Blower On It, Its Has Stock Valley Pan Intake Gasket Which I Don't Think Is Quite Enough To Handle A Blower With 6 Lbs Of Boost.would Like To Run The High Performance Fel-pro Intake Manifold Gasket.my Question Is It Necessary To Run The Vally Pan Intake Gasket To Keep A Little Restriction On The Oil Flow,or Can I Just Leave Out.
Any Help Is Always Appreciated !!
I'm not sure why you don't think the stock sheet metal intake gasket is less likely to seal than a composition gasket. First, do not reuse the old gasket, get a new one. The embossed beads around the ports create the seal and they get flattened out when the intake is torqued. Second, be sure to run a bead of RTV around each of the water ports on both sides of the gasket.
I'm not sure what you mean by "oil restriction". The stock gasket does keep hot oil off the bottom of the intake. If you have your heart set on using composition gaskets, you can take the old sheet metal gasket, cut off the sealing flanges, and snap what's left under the inside lips of the heads, in the valley. This serves to keep the oil off the intake and is free (as compared to the pricey aluminum bolt-in tray from Mondello.