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csrti946

Second espresso shot.... is it best not to over analyse?

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Hi all,

I have an minimally modified Gaggia Classic (2007 ish). I am still striving for espresso perfection. I  prewarm the machine for >20 mins and then almost always make two coffees back to back (ca 5 mins apart; I have to keep the OH happy). I am recording and noting every possible variable for both shots, but am I going over the top for the second shot. From what I have read the temperature on the second shot will be all over the place, if that is right, what's the point?

Would a PID improve the consistency of the second shot?

Shot data:
Bean type, roast, age, storage condition,
Bean weight into grinder,
Grind setting
Bean weight out of grinder
Distribution method
Tamp force (subjective)
Yield
Time
Crema
Taste...

 

Edited by csrti946

Gaggia Classic, steam wand mod; 21g naked PF;  Sage SGP

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Sorry, what does "going on the top with the second shot" mean?

If you were to share your notes, that might help?


“Coffee evokes the most insane reactions in people”, Rene Redzepi.

 

https://markwjburness.wordpress.com/

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Sorry that was a typo, I have edited it to correct it. I meant to say "going over the top"


Gaggia Classic, steam wand mod; 21g naked PF;  Sage SGP

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8 minutes ago, csrti946 said:

Sorry that was a typo, I have edited it to correct it. I meant to say "going over the top"

Thanks, but I still don't know what that means?

Do you mean you are getting too much coffee out of the PF? If so, stop the shot a little earlier. If the time changes by a few seconds it won't matter.


“Coffee evokes the most insane reactions in people”, Rene Redzepi.

 

https://markwjburness.wordpress.com/

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Sorry, you are right that it is not clear. What I am really after is how much variation can be expected in a second espresso shot, which is made relatively quickly after the first? 

I spend a lot of time trying to get everything consistent and measurable, but I feel that on the second shot that might all be in vain.


Gaggia Classic, steam wand mod; 21g naked PF;  Sage SGP

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Problem with the GC, especially if you're temperature surfing, will be the recovery time for the boiler to come up to temp. With first and second shots you'll also have to consider whether the first shot was temperature stable e.g. if you flushed did this affect it and was everything properly pre-heated, portafiter locked in etc. 

A PID will help with recovery, and the variables allow you to tweak it to prefer a faster recovery vs. less chance of temperature overshoot and so on. 

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Vesuvius + Niche Zero // V60 + MBK Aerspeed

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Variation in dose - none.

Variation in grind setting - none (if the first one was good)

Variation in weight of shot - you should be able to keep within 2 or 3g of your target easily, err over rather than under.

Variation in time - maybe 5-6s span. If the variation is larger make sure that you are getting fresh grinds (purge between shots if necessary),  the same weight in the PF each time, distributing carefully (grind into a pot/cup, check weight then shake it & transfer to PF).

 


“Coffee evokes the most insane reactions in people”, Rene Redzepi.

 

https://markwjburness.wordpress.com/

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12 minutes ago, MWJB said:

Variation in dose - none.

Variation in grind setting - none (if the first one was good)

Variation in weight of shot - you should be able to keep within 2 or 3g of your target easily, err over rather than under.

Variation in time - maybe 5-6s span. If the variation is larger make sure that you are getting fresh grinds (purge between shots if necessary),  the same weight in the PF each time, distributing carefully (grind into a pot/cup, check weight then shake it & transfer to PF).

 

Thanks for the tips. At best I will able to check my distribution and tamping by picking apart the puck!

Edited by csrti946

Gaggia Classic, steam wand mod; 21g naked PF;  Sage SGP

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