I want to turbo my D16Y8 and i was wondering about the oil feed and return lines, do i need to weld a bung hole to it? or can i just make a hole, tap it, and then screw a nozzle into it?
The way it is done is a combination of drilling, taping and JB weld. The hole has to be above the oil level in the pan, so it would be best if you can find directions on exactly were to drill. There may be a hole for an oil return line on the block. D16Y8 engines are not in my references for this.
But if you down load the directions for turbo installation on the Miata engine, you will see how it is done with these kits (flyingmiata.com).
T3 T4 T3/T4 T04E T66 T67 T70 GT45 GT30 Turbo Oil Drain Line Kit Oil Return Line, Oil Return Gasket for Garrett HKS TB28 T2 T25 T28 Turbo, Mitsubishi TE06H TD07 T06H-25G Turbo Oil Return Gasket, Garrett T3 T4 T04B KKK K26 K27 Turbo Oil Return Gasket, TD07 T06H-25G TD06SH-25G T67 Turbo Oil Return Gasket, IHI RHB4 RHF4 RHB5 KKK K03 K04 Turbo Oil Return Gasket, IHI RHB4 RHF4 RHB5 KKK K03 K04 Turbo Oil Return Gasket, 17" T3/T4 T04E TURBO OIL DRAIN LINE KIT OIL RETURN T3, Turbo Oil Feed+Return Line Kit For T3/T4 T66 universal, COMPLETE OIL FEED & RETURN LINE KIT T25/T28 GT30 TURBO, T3/T4 T3 T4 T04E T60 OIL FEED LINE & TURBO OIL DRAIN RETURN KIT, Universal Turbo Oil Line Kit Oil Feed Line + Oil Return Line T70 T66 T61 T3/60-1, Turbo Oil Drain / Return Pipe Kit Borg Warner KKK K03 K04 AUDI VW Skoda, Turbo Oil Drain / Return Pipe Kit Mitsubishi TE06H TD07 TD08, Turbo Oil Return Flange Garrett T2 T25 1/2PT female, Turbo Oil Return Flange 8AN Garrett GT15 GT17 GT20, Turbo Oil Return Flange 10AN TRUST T67-25G 06H-25G T78, Turbo Oil Return Flange 8AN Garrett T25 T28 / 44mm M8, Turbo Oil Return Flange Mitsubishi TE06H TD07S T67-25G, Turbo Oil Return Line kit 10AN Garrett T3 T4 T04B 04E T66 to 20mm Barb, Turbo Oil Drain / Return Pipe Kit IHI RHF5 RHF5H RHF55 RHF5HB VF, Turbo Oil Drain / Return Pipe Kit HITACHI HT12, Turbo Oil Return Flange 8AN SUBARU VF34 VF22 VF43 VF38, Turbo Oil Drain / Return Pipe Kit Garrett BB GT25 GT28 GT30 GT35 GT3076R GT3582R, Turbo Oil Return Flange 10AN Garrett T3 T4 T04B 04E T66, Turbo Oil Feed Braided Line / NBR return GARRETT T3 T4, Turbo Oil Feed / Return Line Kit GARRETT T3 T4 T3/T4 T04B T04E, Turbo Oil Feed Line & Return Pipe IHI RHB3 RHB31 RHB32, Turbo Oil Return Flange 41mm IHI RHF5 RHF5H SUBARU VF, Turbo Oil Return Flange 44mm Garrett T25 T28 TB25 TB28,