Just to clear things up for my next batch.

Personally I don't see much of a point of a 30 min addition (never have). I would move that to 15 mins or less. I also think you need more hops in the dry hop (at least 2-3 oz for a beer like this). If not, my bet is your beer will taste much more bitter than aromatic/floral. If you brew as is it will be fine too (it just could be better in my opinion).

 

If you cannot get more hops before dry hopping, then I would do that for sure.

 

Too much? How so? Never heard of something like that. I routinely use 2-3oz in my IPA's.

 

Absolutely. I think you'll get more bang for your buck so to speak.

 

I typically only do 90 minute boils if the base malt is pilsener, to blow off more of the DMS precursors. A couple other reasons would be...

- if you want better mash efficiency via sparging more, and you need the extra boil time to get down to final volume.

- you want more melanoidin formation

 

Additionally, if you choose a 90 minute boil then you could bitter with less hops and also gain more efficiency. The hops leftover from bittering could then be shifted to 15-0-DH for more flavor/aroma. This is especially useful advice if you already purchased all of your ingredients and you don't want to revisit your LHBS.

 

I say try it and see how you like it. Also, should have added to the other reply, but too late to edit... Some may say that a 90 minte boil will allow you to use less bittering hops, due to greater utilization. True, but very marginal. The fuel to boil the extra 30 minutes would be more expensive than the hops saved.

 

Choosing a 90 minute over 60 minute boil has more than one benefit. You wouldn't only be doing it for slightly better utilization, you would also be doing it to save some of those hops for later in the boil, to avoid revisiting the LHBS for more hops, for melanoidin formation (some people want a slightly darker beer and this could be gained from a longer boil vs. using so much crystal 40), etc. etc. etc. ~ Besides, the 30 minutes of extra boiling in fuel costs would be also insignificant. For example, my gas bill is $12-15 on average. If I boiled one beer 30 minutes longer, then my monthly gas bill would probably increase by a dollar or so. You really need more hops anyway... and you need to use them late. - 2 oz. of high alpha hops at 60 min. is kinda much IMO for this particular recipe.

 

Get more hops! Sorry, but that is just not enough to make a good DIPA, even with perfect dry hopping and packaging technique. You need more like 5-6oz for dry hop and you'll want your IBUs to calculate out to well over 100.

 

Color difference between 60 and 90 minute boils? I've never seen it.

 

It's not going to be 5 SRM's worth of difference, but it will be slightly darker in a glass when held up to the light. In addition to more melanoidin formation, you're also boiling off more wort which concentrates it and aids darkening.