Hi all!
I'm planning a new recipy and I'm trying to figure out the amount of grain and water to use. I brew in a 25L pot and I'm not sure if I can do a regular BIAB or if I need to do a MaxiBIAB. So I plot in the details in the regular Calculator and it tells me to use 5736 grams of grain and 23,89L of water. I then plot in the same details in the Maxi-BIAB calculator and it tells me to use 5199 grams of grain and 22,83L of water. Why the significant difference between the two calculators?
I'm aiming for a brew length of 12L, OG 1,092 and the diameter of my kettle is 32 cm.
Hope anybody can help me out because I'm quite pussled by this.
Kristian
Post #2 made 14 years ago
Are your efficiency % figures the same ? they differ depending on which version you have some are default at 79% and some are 83%. set them both at 75% or lower since it looks like a big beer
Why is everyone talking about "Cheese"
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Post #3 made 14 years ago
Ok, I've set the efficiency % to 75 but I still get quite a big difference i grain and water amount. The Calculator tells me to use 6041g of grains and 24,08L of water, and the Maxi-Calc tells me to use 5754G and 23,18L. So there is still quite a big difference, any suggestions?
Post #4 made 14 years ago
Hi there okrist and welcome to the forum,
I think the easiest way around this one is if you can upload both calculator files. This will make things easy. Let us know if you need a hand in uploading the files.
Secondly, with such a high gravty beer, you'l need to knock your efficiency into kettle down to about 69% but we can have a look at that later.
Thirdly, as this will be your first BIAB, it's often a good idea to go with a more 'average' beer. This will mean you'll be able to do a reasonable batch size without having to employ any Maxi-BIAB techniques. For example a 1.050 gravity beer, you'll probably be able to just do in your kettle. The 1.092 beer however will not fit.
Cheers,
PP
I think the easiest way around this one is if you can upload both calculator files. This will make things easy. Let us know if you need a hand in uploading the files.
Secondly, with such a high gravty beer, you'l need to knock your efficiency into kettle down to about 69% but we can have a look at that later.
Thirdly, as this will be your first BIAB, it's often a good idea to go with a more 'average' beer. This will mean you'll be able to do a reasonable batch size without having to employ any Maxi-BIAB techniques. For example a 1.050 gravity beer, you'll probably be able to just do in your kettle. The 1.092 beer however will not fit.
Cheers,
PP
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Post #5 made 14 years ago
Hi okrist
The two calculators are slightly different in the values thay use for the calculations.
The Maxi uses the end of boil volume (EOBV) at 20c figure as opposed to the 100c figure I think the plain old calc uses, and hence the maxi figure is smaller
Also check your evaporation/hour figures are the same. I get around 4L/hr from a 45.5cm pot.
Personally I'd use the Maxi calculator as I think it is a newer version and more refined ( please feel free to correct me or confirm my assumptions guys)
Yeasty
The two calculators are slightly different in the values thay use for the calculations.
The Maxi uses the end of boil volume (EOBV) at 20c figure as opposed to the 100c figure I think the plain old calc uses, and hence the maxi figure is smaller
Also check your evaporation/hour figures are the same. I get around 4L/hr from a 45.5cm pot.
Personally I'd use the Maxi calculator as I think it is a newer version and more refined ( please feel free to correct me or confirm my assumptions guys)
Yeasty
Why is everyone talking about "Cheese"
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Post #6 made 14 years ago
Thanks for the replies Yeasty and Pistol!
I've attached the two calculator files. This is actually my fourth BIAB and I wanted to make a bigger beer this time, an imperial stout. Maybe I should swap some of the grains with extract to make things easier for me?
I've attached the two calculator files. This is actually my fourth BIAB and I wanted to make a bigger beer this time, an imperial stout. Maybe I should swap some of the grains with extract to make things easier for me?
You do not have the required permissions to view the files attached to this post.
Post #7 made 14 years ago
Good on you okrist.
The reason for the difference is the kettle trub value. The Calculator works on 18% so if you change the maxi-biab calculator field B8 to 18%, you'll find all the numbers agree.
You could add some extract but then it wouldn't be all-grain
,
What other beer styles do you like?
Cheers,
PP
P.S. Yeasty, both the calculators use EOBV at the ambient temp for their gravity calcs. The calculator should state this but it doesn't. Proper EOBV really should mean the volume at boiling point so it's not great terminology that we've used there.
The reason for the difference is the kettle trub value. The Calculator works on 18% so if you change the maxi-biab calculator field B8 to 18%, you'll find all the numbers agree.
You could add some extract but then it wouldn't be all-grain
,What other beer styles do you like?
Cheers,
PP
P.S. Yeasty, both the calculators use EOBV at the ambient temp for their gravity calcs. The calculator should state this but it doesn't. Proper EOBV really should mean the volume at boiling point so it's not great terminology that we've used there.
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Post #8 made 14 years ago
Thanks PP! I noticed the difference in trub % but I didn't realize it would effect the amount of grain needed for the brew. My favourite styles are IPA, imperial stouts and Abbey beers. Lately I've also gained interest in sour ales, but I don't think I will try to brew one yet
Post #9 made 14 years ago
okrist.
I had a beer get infected because of my bad housekeeping! It was sour but somehow I knew that I should hold on to it? The wild brew was one of the most refreshing of that summer! I only wish that I had kept the yeast I might be rich today? (I doubt it, I would have spent it on brew supplies)???
Please forgive this post! It is a super warm day! I have been outside drinking homebrew for three hours! It is the first warm day of the year. I am wearing shorts sitting in the sun and drinking "Fish Pee"! WHoo Hoo!!!!
I have said this before but it still holds true. Wait until you have a brew go bad? Tell everyone that it is a "Sour beer" they will drink your mistake! They won't say anything because they don't know what a good sour beer tastes like. Why waste a brew day?My favorite styles are IPA, imperial stouts and Abbey beers. Lately I've also gained interest in sour ales, but I don't think I will try to brew one yet
I had a beer get infected because of my bad housekeeping! It was sour but somehow I knew that I should hold on to it? The wild brew was one of the most refreshing of that summer! I only wish that I had kept the yeast I might be rich today? (I doubt it, I would have spent it on brew supplies)???
Please forgive this post! It is a super warm day! I have been outside drinking homebrew for three hours! It is the first warm day of the year. I am wearing shorts sitting in the sun and drinking "Fish Pee"! WHoo Hoo!!!!
Last edited by BobBrews on 15 Mar 2012, 02:01, edited 3 times in total.
tap 1 Raspberry wine
tap 2 Bourbon Barrel Porter
tap 3 Czech Pilsner
tap 4 Triple IPA 11% ABV
Pipeline: Mulled Cider 10% ABV
http://cheesestradamus.com/ Brewers challenge!
tap 2 Bourbon Barrel Porter
tap 3 Czech Pilsner
tap 4 Triple IPA 11% ABV
Pipeline: Mulled Cider 10% ABV
http://cheesestradamus.com/ Brewers challenge!
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Post #11 made 14 years ago
[Sorry, 'posted' this last night but forgot to hit submit!]
Wow! All big beers.
You'll either have to brew smaller batches or use some maxi-biab techniques which usually require a second vessel to heat water etc. (This second vessel can be as simple as a saucepan or kitchen kettle.)
I have to call it a night but some of the other guys might be able to give you a few tips.
PP
P.S. Good on you Bob
Wow! All big beers
.You'll either have to brew smaller batches or use some maxi-biab techniques which usually require a second vessel to heat water etc. (This second vessel can be as simple as a saucepan or kitchen kettle.)
I have to call it a night but some of the other guys might be able to give you a few tips.
PP
P.S. Good on you Bob
If you have found the above or anything else of value on BIABrewer.info, consider supporting us by getting some BIPs!
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Post #12 made 14 years ago
Fermenting: -
Cubed: -
Stirplate: -
On Tap: NS Summer Ale III (WY1272), Landlord III (WY1469), Fighter's 70/- II (WY1272), Roast Porter (WY1028), Cider, Soda
Next: Munich Helles III
5/7/12
Cubed: -
Stirplate: -
On Tap: NS Summer Ale III (WY1272), Landlord III (WY1469), Fighter's 70/- II (WY1272), Roast Porter (WY1028), Cider, Soda
Next: Munich Helles III
5/7/12
Post #13 made 14 years ago
Thanks, I will!stux wrote:Try the CE Calculator
viewtopic.php?f=74&t=1066
Last edited by okrist on 15 Mar 2012, 22:02, edited 3 times in total.
