Quote:
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Originally Posted by daggers_nz
hi there I wanted to take this partial grain recipe and get rid of the LME:
Pale (4.5 lb)
Crystal 10L (0.5 lb)
Carapils (0.5 lb)
Wheat (0.5 lb)
Light LME (3.3lb)
so I've calculated how much percentage each grain makes up in the total grain bill (excluding the LME) and then multiplied it by the mass of the LME to get the additional amount of each grain to add to the original bill.
ie. Pale = (4.5lb / 6lb) = 0.75
4.5lb + (0.75 * 3.3lb) = 6.975lb
and the end result is:
Pale (6.975 lb)
Crystal 10L (0.775 lb)
Carapils (0.775 lb)
Wheat (0.775 lb)
is this correct or have I done it wrong, missed anything etc. Left out the hops as that will stay the same anyway
thanks
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The LME is replaced directly with 2-row. You don't need to scale the entire grain bill. In fact, doing so will completely change the recipe.
You need to calculate the gravity of the LME you are replacing, then figure out from there how much grain to use. LME is 38 pppg (potential points per gallon or 1 pound of LME in one gallon of water will yield an SG of 1.038)
You need 125.4 points (38x3.3lbs) to replace the LME.
2-row is 37pppg (I think? Someone please correct?) however, you won't get 100% extraction. Let's figure 80% because I have no clue what your efficiency looks like. Sooo....
125.4/37/.8=4.23lbs of 2-row making your recipe look like this.
Pale (8.73 lb)
Crystal 10L (0.5 lb)
Carapils (0.5 lb)
Wheat (0.5 lb)
Light LME (3.3lb)
I just reread this and realized you said pale malt. The pppg may be different than 2-row, but the math is still the same.