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Messages - a10t2

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Kegging and Bottling / Re: Quick, quick carbing question?
« on: November 03, 2011, 08:13:18 PM »
But a beer that's been on 8 psi long enough to equalize the pressure, will not be undercarbed.

Depending on the temperature. I keep my kegerator at 44°F, so 8 psi would be 1.95 vol.

The Pub / Re: The McRib is back!!!
« on: November 03, 2011, 05:23:48 PM »
I only eat there with the nephews. That place has a strangle hold on kids for some reason....

I seem to recall that even as a kid I thought the food wasn't very good. The toy surprise is how they get the kids in, isn't it? That and the playground. Or do all the franchise fast food places have playgrounds?

On-topic (ish), I don't think I've ever had a McRib, and the closest McDonald's is an hour away, so I doubt I will.

The Pub / Re: Why hide behind a Alias?
« on: November 03, 2011, 03:20:37 PM »
As far as I'm concerned, I don't feel that anyone that can't reveal their name can expect to be taken seriously.  Why would a reader assume that if someone is not willing to stand behind what they say, that they should be believed or taken seriously?

What do you have against someone being able to choose their own name? If someone doesn't like the name their parents chose for them and goes through the process to legally change it, do you take them less seriously?

Yeast and Fermentation / Re: Too Small a Starter or RDWAHAHB?
« on: November 03, 2011, 03:10:23 PM »
You probably did under-pitch, though not by a whole lot. With a brand-new pack, the MrMalty calculator puts it at 250-300 billion cells total.

A 24-48 hour lag is normal for most lagers anyway, IME.

Kegging and Bottling / Re: Quick, quick carbing question?
« on: November 02, 2011, 11:04:22 PM »
I set it to 15psi, it pours fast but doesn't foam up if I am careful.

I'm guessing it hasn't had time to equalize yet. In 2-3 days it'll probably be over-carbed.

All Grain Brewing / Re: Efficiency for no-sparge?
« on: November 02, 2011, 04:47:34 PM »
Batch sparge??? There are no batches with NO sparge methodology. Are we talking about the same thing?

Yes, we're talking about the same thing, just using different definitions. I think of no-sparge as a batch sparge with a single "batch". Either way, the lauter design and speed won't affect efficiency, and the math for predicting lauter efficiency is the same regardless of the number of batches.

All Grain Brewing / Re: Efficiency for no-sparge?
« on: November 01, 2011, 10:00:57 PM »
I do 60 min single-infusion mashes for almost everything, but I do crush pretty fine (0.75 mm). I use a slotted CPVC manifold and take about 3-5 min to drain the tun. IME I couldn't run off that fast using a braid - it just collapsed. I batch sparge, though, so lauter tun design and runoff speed shouldn't matter.

All Grain Brewing / Re: Efficiency for no-sparge?
« on: November 01, 2011, 04:51:02 PM »
You can make a 1.060 beer with a single draining of the mash tun after you vorlauf?

If your efficiency is 75% then you are doing that with 11 pounds of malt on a 5 gallon batch and that is certainly impressive.

You should write up your exact techniques so others can learn how you are able to achieve efficiencies on a no-sparge many don't quite get with a batch sparge or fly sparge.

I'd guess most home brewers aren't getting nearly 100% conversion efficiency. Their LHBS mill gap is set pretty wide, they don't pay attention to mash pH, etc. If you *can* get full conversion, then calculating lauter efficiency is simple and very accurate, in my experience. In the last 25-30 batches I've not missed my target efficiency by more than 3%.

On my last no-sparge, I used 8.5 lb of grain and 4.9 gal of strike liquor. The theoretical maximum efficiency would be about 72%. I ended up with 3.0 gal of 18.2°P wort, which is ~69% efficiency. So apparently that mash only reached ~96% conversion. That would be equivalent to using 14.2 lb of malt to make 5 gal of 1.075 beer.

To get 5 gal of 1.060 wort post-boil (6 gal at 1.050 pre-boil), mash 11.5 lb of grist (77% AICG) with 7.4 gal water. That's ~75% efficiency. If your conversion efficiency is only 80%, though, the overall mash efficiency will be 60%. If it reaches 90% conversion, the overall efficiency will be 68%, etc.

Extract/Partial Mash Brewing / Re: 5.2 stablizer and partial mash
« on: October 31, 2011, 02:23:19 PM »
Is it working out for you? I've never actually heard of anyone who was successfully able to use it to adjust mash pH.

All Grain Brewing / Re: Efficiency for no-sparge?
« on: October 31, 2011, 01:59:53 PM »
Doesn't this ignore the volume contribution from dissolved sugars?

Good point. Kai's spreadsheet assumes a solute volume of 0.63 L/kg, but of course that wouldn't be constant for all concentrations. Working with that assumption, though, the total volume ends up being ~8.8 gal, so the efficiency would be ~74%. You could probably just knock 10% off the un-corrected volumes and get a conservative estimate.

You do realize you are only calculating a volumetric efficiency of the water utilized, correct?

Exactly. If you're making the assumption that all the available sugars are uniformly dissolved in the water (100% conversion efficiency), then there are no other variables. If you measure the actual mash volume (which as malzig pointed out, isn't constant) and the actual runoff volume, the ratio between the two is the lauter efficiency. If you're getting an overall mash efficiency that's less than that, it's because conversion efficiency was <100%.

General Homebrew Discussion / Re: sanitized water
« on: October 31, 2011, 01:46:30 PM »
You could always plate your tap water and find out for sure. Just make sure you get a sample from whatever faucets/hoses/etc. you'd be using for the top-off water.

You don't need to use pre-boiled water to make up a batch of sanitizer though. The sanitizer itself will kill off anything that's in there.

All Grain Brewing / Re: Efficiency for no-sparge?
« on: October 30, 2011, 11:38:29 PM »
As long as your conversion efficiency is 100%, it's really easy to calculate what the efficiency will be for a no-sparge. It's just the ratio of the mash runoff to the total strike volume.

For example, if the grist weight is 12.5 lb (1.5 gal absorption) and the pre-boil volume is 6.5 gal, the efficiency will be 6.5/8.0 = 81%.

General Homebrew Discussion / Re: What do you want Santa to bring you?!
« on: October 30, 2011, 03:00:19 PM »
What's on your Christmas list for Santa to bring to you?

A paycheck, so I can keep brewing!

Whoa now! It ain't even Halloween yet!  ;)

Maybe it's Canadian Christmas? They do have Thanksgiving in October, you know. ;D

The Pub / Re: CD to mp3
« on: October 28, 2011, 01:51:20 PM »
petabyte hard drive
I think you could probably reduce the bitrate a little and be OK.  ;D

Yeast and Fermentation / Re: Pitching Rates: Wyeast vs Mr. Malty
« on: October 27, 2011, 10:34:54 PM »
Why did I think that a vial was 125 ml?

The Wyeast activator packs are 125 mL.

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