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Mrboots2u

Boffin thread ( ek43, refracting, pressure profiling, ; other guff)

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Little by little martin, the force around you is quite strong...

 

Is this a good thing ? :)


I write a blog, it's nothing to do with coffee ...

https://rjwinc.wordpress.com

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Hi ve created a new thread and brewed it across to the brewed sub forum ...

Makes it easier and ,ore searchable if other people wanna use it later..

All the post re new brew ratios etc are there now

http://coffeeforums.co.uk/showthread.php?21260-Ek43-Exploring-new-brewed-ratios&p=251013#post251013


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Ok here is a set of variables for you

Ek 43 coffee burrs - hasbean coffee..

Making a traditional strength tasty shot on the vesuvius machine

Before we start... not meant to be a prep clip , i know you can't see me tamp etc.....

Dose 17.9g Ek 1.7 callum dial

the rest is on the clip

Taste wise a little bit strong for my personal palate , but its a traditional strength , chocolate tasting, ek espresso none the less....:)

Edited by Mrboots2u

I write a blog, it's nothing to do with coffee ...

https://rjwinc.wordpress.com

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Nice vid boots, I'm currently grinding at 1.9-2 on 3FE (equivelent to 1.7 on Callum's dial) and the pours have been great. Not refracted anything yet though...


DE1Pro, EK43 SSP, bloody tasty coffee!

GrindScience.com - My blog of coffee related ramblings

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18 secs pre infusion? 34 out? Wild bootsy!

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Would be interesting to see extraction yields at various pre-infusion times - 5, 10, 15 sec - all other factors kept constant. Over to you Boots.


Londinium-R - EKS43 running SSP Silver Knight burrs

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I do 5 secs at two bar, no idea why that became the norm

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I do 5 secs at two bar, no idea why that became the norm

 

How fine are you grinding Jeebsy? I'm running 15 sec preinfusion at 2 on the 3fe dial and it's rocking.


DE1Pro, EK43 SSP, bloody tasty coffee!

GrindScience.com - My blog of coffee related ramblings

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I do 5 secs at two bar, no idea why that became the norm

 

Precisely.


Londinium-R - EKS43 running SSP Silver Knight burrs

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More consistent particle size distribution should permit finer grind? Finer grinds need more care to avoid channelling. Longer pre-infusion seems, intuitively, the way to go to to ensure best extraction yields but this needs testing.


Londinium-R - EKS43 running SSP Silver Knight burrs

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Interesting thread, Spence. Anyone fortunate to get their hands on the five variants in HB's Finca Argentina offering would see how science, applied to coffee production/processing, is capable of making significant improvements in the cup.


Londinium-R - EKS43 running SSP Silver Knight burrs

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How fine are you grinding Jeebsy? I'm running 15 sec preinfusion at 2 on the 3fe dial and it's rocking.

4 on the 3fe dial with the current imm

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More consistent particle size distribution should permit finer grind? Finer grinds need more care to avoid channelling. Longer pre-infusion seems, intuitively, the way to go to to ensure best extraction yields but this needs testing.

 

Defo need 18g in the 20g vst with these big pre infusion times . Just pulled another the coffee swelled up bonkers in the pf. Can tell as am using a ridged basket....

Pulled another now 18g in a 20g vst , bottomless extraction . 20.6% EY ..43 seconds long

Anyone wanna see a car crash naked ek43 extraction clip.....?


I write a blog, it's nothing to do with coffee ...

https://rjwinc.wordpress.com

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Would be interesting to see extraction yields at various pre-infusion times - 5, 10, 15 sec - all other factors kept constant. Over to you Boots.

 

Using what protocol though

Same brew ratio?

same dose , same grind ? same dose different grind ...

The 1.7 18 g shot at 5 seconds pre infusion chokes the machine .....


I write a blog, it's nothing to do with coffee ...

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4 on the 3fe dial with the current imm

 

Makes sense, so we're going finer but increasing pre-infusion to ensure shot finishes within a "normal" time frame.


DE1Pro, EK43 SSP, bloody tasty coffee!

GrindScience.com - My blog of coffee related ramblings

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Same dose, grind, extractin time and brew weight. Pre-infusion the only variable.


Londinium-R - EKS43 running SSP Silver Knight burrs

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Makes sense, so we're going finer but increasing pre-infusion to ensure shot finishes within a "normal" time frame.

43 seconds :)


I write a blog, it's nothing to do with coffee ...

https://rjwinc.wordpress.com

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Rights lets see if the grind finer, pre infuse longer , better prep , makes a difference to the car crash naked pf extractions..........


I write a blog, it's nothing to do with coffee ...

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THat pour looked not bad Bootsy, passable as a naked effort

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THat pour looked not bad Bootsy, passable as a naked effort

 

for an EK its no bad.....


I write a blog, it's nothing to do with coffee ...

https://rjwinc.wordpress.com

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for an EK its no bad.....

 

Pah. THis is a naked EK shot

 

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How fine are you grinding Jeebsy? I'm running 15 sec preinfusion at 2 on the 3fe dial and it's rocking.

 

18 secs PI, ground at 2 on the 3fe dial, 51.8 out in 50 seconds. Think i tamped a bit harder than usual but motor skills are impaired by the fact it's under 8° in my flat just now. Shot was alright (still really tasty but not the best i've had from this bag though). This is one of the nicest choc-tasting coffees i've had.

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Perhaps pulled the best shot of anything form the Ek tonight ...

Atkinsons Nigelle Gorbitu

Had it as brewed before and been trying to come up for a recipe for it , as the roasters are having the EK on the bar next week...

As brewed always got the tangerine and cities notes but subtle and sharp ( even at great extraction yields )

Over the day pulled a few then with the last few grams tried again.

17.5 g in 18g vst ( EK at 1.5 callum dial this is essentially a filter brew roast )

41.3g out tds 9.2 extraction yield =22.6

Pressure 16 seconds at 2 bar

2 at 3 bar - 2 at 4 bar - 2 at 6 bar - 10 at 8.5 bar

32 seconds total

The clearest sweetest tangerine orange notes of any espresso ive ever had little slight lemon citrus zing in the back end .

Super sweet super balanced ..... great body , good firm crema.....

Difference is been dialling this different way .

Using the naked making sure ive got the puck saturated up to 16 seconds but not extracting

Full stream then starts at 8..5 bar

I tuned the dose and grind to get to this point .....

First time i was getting streams at 2 bar or at start of ramp up...

Yeah there was still some micro channeling , with small dead spots around the centre ...

I think the flow and stream would be better at 8 bar or little less.

8. 5 bar seems to fix the extraction in the puck ...

Bloody hell it tasted good though...........

10b97d495f41c8b47cc9d5e63f2b3300.jpg

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I write a blog, it's nothing to do with coffee ...

https://rjwinc.wordpress.com

Instagram - rjw_inc

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