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Old 03-26-2009, 01:53 AM   #1
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Default All grain to partial mash conversion

I'm attempting to convert an all grain recipe to partial mash and would like some advice. The recipe is from The Homebrewer's Recipe Guide and is an IPA with oak chips.

The AG recipe is as follows:

9 lbs. British Pale Malt
1/2 lb. Cara-Pils Malt
3/4 lb. Crystal (80L)
2 tsp. Gypsum
1 1/2 oz. Kent Goldings (Bittering)
1 1/2 oz. Kent Goldings (Aroma)
1 1/2 oz. Cascade (Dry Hop)
2 oz. Oak Chips
1 Packet American Ale Yeast

My partial mash recipe:

5 lbs. Amber DME
2 lbs. British Pale Malt
and everything else remaining the same.

I just started using Beersmith and the gravity is within range, but I don't know if that is all I need to look at for a proper conversion.

Any assistance using Beersmith for this would also be helpful.

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Old 03-26-2009, 02:01 AM   #2
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I would probally use Light DME instead of the amber to try and keep it in the color range of an IPA. The amber might make it a little darker than you would want

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Old 03-26-2009, 02:02 AM   #3
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If you look at this conversion chart it says that you'll need 5.25 lbs of LME and 4.2 lbs of DME.

If you are keeping 2 lbs of pale malt, then you are subbing out for 7lbs of malt and thus would need less DME than you have listed.

but i'm sure someone will correct me if i'm wrong

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Old 03-26-2009, 02:22 PM   #4
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I think he went with the DME at .65 lbs per pound of grain he is substituting instead of .60lbs like that chart uses. I have seen .6 or .65 in my search the past couple of days. If you do .65lbs DME per pound of grain you are substituting you will get 4.55 so I guess he rounded up?

All that being said this is all very to new to as well so I could be wrong as well.

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Old 03-26-2009, 09:34 PM   #5
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MgMt_Home_Brew,

You give me waaay to much credit. I simply added DME into Brewsmith until I got to the right SG.

Donner,

Are you saying that I would have to use Both DME and LME in this conversion, or are the amounts either 5.25 lbs. of DME OR 4.2 lbs. of LME?

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Old 03-26-2009, 10:31 PM   #6
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after rereading my post it should say OR instead of and. It's one of the other, not both, my bad.

The link i attached makes doing the conversions pretty easy (in case you haven't looked at it yet).

Again, sorry, LME or DME, but not both, at least not in those amounts. But i do also second using light or extra light extract for color.

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Old 03-26-2009, 11:38 PM   #7
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Thanks Donner,

That chart will make conversions a lot easier. Do you use any brewing software?

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Old 03-27-2009, 12:25 AM   #8
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i occasionally use beer alchemy (since i run a mac), but i haven't played with it enough to trust making the conversions. It's fairly easy to just total up my specialty grains and subtract that from the number of pounds i can mash. Once i know how much pale malt i can use i just sub the rest out as DME. After i do that i'll enter it into beer alchemy to make sure my numbers still yield the right gravities and then use the print out to aid me on brew day.

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Old 03-27-2009, 03:01 AM   #9
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check this out
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Old 03-27-2009, 12:03 PM   #10
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I have been reading the 2 links that are posted in here and they are both really helpful for converting recipes. The one that fivehoursfree posted seems much more thorough but they are both good.

Last night a attempted to convert BierMuncher's centennial blonde recipe and I think it turned out pretty good. I didn't account for the temp difference but the target OG was 1.040 and I hit 1.042-44. And that was using 5 pounds (including specialty) of grain and like 2.5 pounds of DME. I can't wait to see how it turns out.

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