First I could only get 3 out, then reloaded and tried, up to 4, 5 then eventually 6.
I think time only actually passes when you are at the screen that you can choose Disenchant, Item, Spells, Soul gems.
I would immediately hit right to get into the item menu, then try to be speedy to pick the item, hit a, then quickly left,down,right to pick enchants, repeat.
And I actually renamed each item as well. I used controller when testing 4 and under items, I switched to a usb keyboard when I got tired of retyping everything. I just named it Smith Shirt+, Smith Ring+, etc. So I did the smith shirt, ring, necklace, bracers, a daedric sword and a pair of boots.
+1
I have the Xbox 360 version and was am able to do 4 items with two enchants on each in the 30 second window. The time is definitely GAME TIME and not real time (at least on the 360 version). This is to say, that if you press the start button to pause, or press the Y button to rename, the timer stops.
A couple of useful tips:
1. Put all of the enchantable items that you aren't trying to enchant at the moment in a chest or barrel so that you don't have to wade through irrelevant items when speed enchanting. This has the added advantage that you can just select the first item and when you are done, the second item is auto-selected as the first is already enchanted. Also stash all soul gems that you don't plan on using so those don't get in the way as well.
2. Work out what gets what ahead of time and write it down.
2. Stay focused and work in short, quick bursts. That is, drink the potion, use the enchanter, select the first item, quickly go to enchants, select the desired enchant, go to gems and select it, press y, then chill out as you name the item, knowing that the clock is stopped. After you are done with the first, pause it. And get your priorities straight in your head. That is, OK, next is the Helmet with the Fortify Magic Regeneration Enchant. Then unpause and execute.
3. Start where the last enchant finished. That is, the first enchant is goes: Item, Enchant, then Gem. The second enchant goes: Gem, Enchant, Item. It's faster this way with less menu scrolling. That said, it can be easier to do the item before the enchant as the irrelevant enchants will be grayed out, making it easier to identify the desired applicable enchant. So, sometimes I will go: Item, Enchant, Gem; Gem, Item, Enchant.
4. Chill out. If you get too worked up or confused or sense an imminent brain fart, just pause it. Think about what item and enchant are next and then proceed. You can pause at each screen. Select the item. Go to the enchant screen and pause. Figure out where you are going mentally then unpause and execute.
5. Try a "dry run" of just going through and selecting the pieces and enchants before you drink the potion, so that there are no surprises.
5. Save your game before you start. This way if you mess it up, you can just reload and try again. You can verify that you were successful by taking a good look at the item after you press the enchant and it asks you to confirm. The clock is paused here. Everything is locked in. So check to see that the numbers are right. If they are at base, then you should try again. It helps to check what the base is before you drink the potion. If you are doing a set of something, e.g. Pickpocket Gloves, Boots, Necklace, and Ring, it should be obvious as the numbers should match the first several pieces.
Eventually, if you get more fortify enchanting ingredients for potions this becomes less of a big deal, but for when resources are tight I hope you find this helpful.
