Redonkulously high Pacman attenuation

[kcpup]

Ok -

Used rinsed Pacman (2nd use) sourced from Wyeast. OG 1.053...FG 1.008!??

Pacman is highly attenuative, that I know. I use it a lot. I mashed at 155 so I wasn't expecting this. I fermented at appropriate temperatures - low 60's for Pacman.

NO simple sugars in recipe.

I tasted the hydrometer sample when I racked to keg. It tastes good - not funky. It is a clone recipe of a commercial beer, and it isn't way off.

Am I deluding myself on no infection? Sure tastes clean like I'd expect.

Maybe overpitched? I use Mr Malty, etc, but perhaps I input an incorrect number.

Anyway, interested in thoughts.

Thanks, and cheers

 

[Hex23]

If it tastes clean I'd doubt there is an infection. My two Pacman beers (both from bottle harvested yeast) got to about 75% attenuation (yours is like 86%). And I did mash high (156F) to make sure it didn't bottom out. Maybe your yeast source, being more pure, would attenuate higher. Here is another account of high Pacman attenuation: www.homebrewtalk.com/f13/holy-attenuation-pacman-15741/

You could also question the accuracy of your mashing thermometer and your hydrometer. Maybe they are off a little?

 

[kcpup]

Yes, I saw that post. However, at 85% or so it just seemed wayyy out of the ballpark. 80% didn't see too crazy.

Good thought about thermometer - I'll have to check it out. Perhaps it measures artificially high and the mash temp was on the low side.

Hydrometer is a limited scale precision one, so it probably isn't there...

Thank you for the thoughts - that gives me something to investigate.

 

[spearko520]

i've gone down pretty low with pacman- when you say no simple sugars- what was your bill? and how many days? all my infections never tasted (or smelled) too hot.

 

[kcpup]

Grain Bill:
7 lb Pale Ale
1 lb Munich - Light 10L
1.25 lb Carapils (Dextrine Malt)
0.7 lb Caramel / Crystal 20L

In carboy for 18 days before kegging. Primary only. Dry hopped in boiled bag with pellets.

 

[TimTrone]

Wow, it got down that low even with 1.25lbs of carapils?