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:

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.

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...Always Somethin'

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

Member V8-Ranger.com

Doesn't matter. They can go either way.

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'92 Mustang GT
A9P (AOD to TKO swap)

It's called hydraulics :)

Hole position doesn't matter. The area between the two raised areas becomes a chamber with pressurized oil that then feeds that hole.

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85GT, 302 w/Dart Windsor Jr heads, Crane 2030 equiv. Performer 5.0, 75mm TB, 88mm slot MAF, 34lbs injectors, BBK shorties, 5spd converted to 4R70W with Baumann controller, 9" rear w/3.25s
A9L running A9P bin via Quarterhorse w/LC-1 WB

In that case, I'll put all the holes UP.

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...Always Somethin'

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

Member V8-Ranger.com

you did keep track of your lifter order correct? as they said, it doesn't matter up/down, but lifters do "seat in" to their bore in the block. if you're not putting new ones in, best to use them in the same order as they were before. Which I'm sure you know already, but just a reminder :)

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1978 Mustang II King Cobra
89 5.0HO, Stock Short Block, Edelbrock 4bbl aluminum intake, Holley 650 double pumper, MSD 6AL, Ford F303 cam, 1.7:1 Crane Roller Rockers, Pocket Ported stock heads, Hedman Long Tube Headers
5 spd Manual
Full roll cage, 9" full floater w/Currie trac lock/373 gears, RCI Fuel Cell
Project Page: http://www.brandttuning.com/projects.htm

I was going to do that until I heard that keeping order wasn't important with roller lifters. So no. They are all in a box and I have zero clue which goes in what bore. I probably should've done that but as it turns out, this is not even the original block they came out of. This is an 87 YYY block. The original Explorer block was an XXX block. So given I've swapped blocks and cams, I don't know that order could matter at all.

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...Always Somethin'

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

Member V8-Ranger.com

ive always put them up, ive never labeled pushrods rockers lifters etc.. im known to throw them in the valve cover half way sequentially then just tossin them back in when the time comes

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http://www.efidynotuning.com/ford/

I never kept track of the order the lifters were in...

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90 GT - In storage, waiting for an engine... probably 351w based and EEC-V for CoP.
87 LX N/A 2.3 - CZAJL & EDIS
http://tunexchange.mustang-tech.org/ - RIP
http://www.SeattleBlueOvals.com - My Local Site

If we knew what we were doing, we wouldn’t call it research, would we? - Albert Einstein

if it's a different block it won't matter. It probably doesn't matter even if it's same block, but it doesn't hurt either. If it's flat tappet lifters, you absolutely have to keep track if you're doing a rebuild, and you always want to install new lifters with new cam. As I grew up doing rebuilds with flat tappet, I keep my rollers in order out of force of habbit.

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1978 Mustang II King Cobra
89 5.0HO, Stock Short Block, Edelbrock 4bbl aluminum intake, Holley 650 double pumper, MSD 6AL, Ford F303 cam, 1.7:1 Crane Roller Rockers, Pocket Ported stock heads, Hedman Long Tube Headers
5 spd Manual
Full roll cage, 9" full floater w/Currie trac lock/373 gears, RCI Fuel Cell
Project Page: http://www.brandttuning.com/projects.htm