gravity of first runnings in all grain

[Caffinehog]

I plan to make an all-grain imperial IPA from the first runnings of my grain, and make a regular pale ale off the rest. What kind of gravity should I expect from the wort if I just use the liquid I drain off the mash? I'm probably going about .75-1qt/lb.

[Tweek]

Originally posted by Caffinehog
I plan to make an all-grain imperial IPA from the first runnings of my grain, and make a regular pale ale off the rest. What kind of gravity should I expect from the wort if I just use the liquid I drain off the mash? I'm probably going about .75-1qt/lb.

There is far too much information missing from that statemnet to make any sort of judgement call. We would need to know your grain bill and your brewhouse efficiency to give you any sort of accurate answer.

[Fast_Eddy]

What the hell - I'll make a guess. You'll get 3 gallons @ 1.080 (+- 2 gallons and +- .020) ;)

[Caffinehog]

Thank you. For what it's worth, I'm using almost entirely pale malt with about 5% crystal.
Efficiency wouldn't really give the right answer, because it deals both with conversion and sparging, and the latter won't be an issue since I'm just using the first runnings.

[brewmonkey]

How much grain do you plan on using?

If you plan on making an I2PA and a small beer you might want to start with a bigger grain bill, collect most of the wort and adjust the gravity down with water and then collect second runnings for your pale ale.

My guess would be that with just a regular grain bill for an I2PA your second runnings will not be enough for a pale ale.

The second suggestion would be go with a standard grain bill, collect your first runnings and make your I2PA. Sparge and collect the second runnings and bring it up to speed with a little DME.

I don't know about Stod, but I always keep DME around for beefing up a wort were we missed gravity (it even happens to us) or for beers where the tun just wont hold that amount of grain and still lauter out.

[Caffinehog]

Thanks guys! I used about 15# pale, 1# crystal, and I got about 4.5 gallons at about 1.08. (temperature adjusted... it's just starting to boil now.) It looks like I'm also getting about 3 gallons of pale ale at about 1.03 or so, which ought to make a nice, light pale ale.