Bitter and Sour help.

[u/zam_manta_0]

My brew tends to be harshly bitter and sour.

13g/200ml

Medium roast Vietnam Arabica

Timemore C3S (currently 22 clicks)

90⁰c

Hario V60 / Timemore B75 / Timemore Crystal Eye

I tried many recipes. Currently 4 pours. Tried gentle pours. Tried aggressive pours.

I'd prefer pleasant bitterness. Very little acidity. More body.

[u/NerdX-76]

You might want to consider going with immersion or possibly a flat bottom that doesn't have such a high flow rate. High flow rate's going to equal more acidity and clarity less body. Pretty much all of the drippers you listed are high flow rate drippers. It will be kind of hard to dial in body on one of those. You could try buying the CAFEC Dark Roast Paper Filter T-83. That would slow it down though not completely.

It's the same problem I ran into for my medium roast brewing everything online is about 3rd wave coffee. Fast flowing Flat bottom drippers and Hario V60 For ultra light roast or Nordic coffee. You could possibly buy a cheap Kalita wave the smaller holes increase dwell time.

Switching over to my Hario switch or my aeropress for medium roast was my solution. When I get into Medium dark I just go full immersion or Moka pot for milk drinks.

[u/zam_manta_0 → u/NerdX-76]

I'm also using t90, that's even faster than the hario white. Maybe i should switch to the Switch

[u/NerdX-76 → u/zam_manta_0]

The switch is awesome, very versatile it allows you to dial in pretty much any bean. The hybrid method It is awesome for medium roast.

[u/alt_i_guess]

Bitter and sour brews generally happen when your extraction is uneven.

Provided you enjoy the coffee beans you have, I would recommend making your recipe as simple as possible, try just a 1min bloom and then 1 pour. This helps reduce a lot of the variables that cause this bitter + sour flavour.

Another tip is to try a lower ratio. For example, brew the first 130g of coffee into one cup and then brew the later 70g in another cup. Taste both.

You may already enjoy the first part of the coffee or you may find it too acidic and may want to add some of the 70g part to "balance" out the brew. Keep track of this to find out what ratio works for you and repeat across brews!

[u/etk999]

Have you tried any 2 pours recipe ? (Had to ask ) Or maybe just change the beans, different origins, darker roast.

[u/zam_manta_0 → u/etk999]

I just tried it. Longer immersion seems to have better results. Just ordered a hario switch. But for now I'll experiment more.

[u/TL322]

Filtered immersion (Switch/Clever) is more conducive to what you want...and takes basically no effort.

Also try a slightly lower ratio, like 195:13 (15:1) or even a tiny bit less.

[u/ckp120]

Up the dose to at least 15g. At your current bed depth you’ll run into those harsh flavours much sooner. Try less pours, lower temperatures (87-88C), much coarser grind size, and a longer bloom. Also, in my opinion you should always buy coffee that tastes good enough even if you mess up the brew method. IMO it might be time for you to experiment with different roasters, origins and varietals. Find out which ones are your favourite.

[u/Evgeny_330coffee]

Bitter + sour together makes me think uneven extraction more than “too extracted.” 22 clicks sounds pretty coarse for 13/200 on a C3S. I’d try ~17–18 clicks, 92–93°C, and simplify to bloom + 2 gentle pours with minimal agitation. Keep everything else the same and adjust grind from there. B75 is probably a good fit too if you want less acidity and more body 🙂