When I tore the engine down, I noticed most of the lifters had the oil inlet down, but some were up. However I thought I'd ask which way is the best way for them to go. Here's a pic of what I'm referring to:
StockLifter_OilInlet.jpg [ 37.01 KiB | Viewed 642 times ]
In the pic, you see one with the oil inlet exposed to the camera. The other lifter has it pointing down.
My gut feeling is the hole should go down but obviously, if the factor installed some up and some down, it can't matters all that much...but I thought it would still make for a good discussion.
BTW, I just find it is neat that the lifter creates enough of a seal in its bore to allow oil pressure from the pump to pressurize that area between the machined surfaces, push oil into that hole, up the pushrod, and onto the rocker x16.
89 Ranger Supercab, 331 w/GT40p heads, ported Explorer lower, Crane Powermax 2020 cam, 1.6RRs, FMS Explorer (GT40p) headers, Slot Style MAF, aftermarket T5 'Z-Spec', 8.8" rear w/3.27s, Powertrax Locker, Innovate LC-1, GUFB, Moates QuarterHorse tuned using BE&EA