Adjustments for full boils with hopped extract?

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blokeyhighlander

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I was in a pinch and had to purchase a kit (5 gallon batch) from the local shop. The directions for the kit have a 30 minute partial boil with:

3.3 lbs Muntons hopped amber LME
2 lbs Briess Sparkling Amber
1 oz hops (Cascade pellets, I'm assuming...)

The partial boil calls for 1.5 gallons of water to boil, plus the above ingredients.

My question is this - If I want to maintain the IBUs from the original recipe, what hop adjustments will I need to make on the Cascade pellets if I'm doing a full boil?

I don't know if there is higher utilization when doing full boils with hopped extract. Also, when I punch this recipe in to BeerCalculus, I have a much lower starting gravity than the 1.050 - 1.055 range that this kit states.

Anyone have any insight?
 

Bear419

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You are right, a full boil will utilize more hops than a partial boil. It's been a while since I've done IBUs by hand, but if you plug this into the trial version of beersmith, you'll have your answer.
 

FiddleTilDeath

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if you don't actually know which hops they are, you are not able to do this calculation. I say just use them and RDWHAHB! I'm 100% positive adding more hops will make you happier.
 

unionrdr

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Pre-hoped extracts should NEVER be boiled. It changes the hop profile brewed into it by the maltster. That's why I use plain DME in the boil for hop additions when adding some pre-hoped LME. I add the pre hoped stuff at flame out,cover & steep for 10-15 minutes.
 
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