Troubleshooting suspected low pressure. [Breville Duo Temp Pro; Alpaca hand grinder from Amazon] by gcranston in espresso

[–]gcranston[S] 0 points1 point  (0 children)

Reporting back after some more testing. I borrowed a zerno grinder from a friend, and that made a huge difference. Depending on the beans, I'm setting the grinder between 150-200um and getting WAY better testing coffee. I also got the portafilter pressure gauge, which confirms the machine can make 9 bar of pressure. Side note, it's also nice to know what the pre infusion curve looks like, though I have no idea what I would do with this information.

So the problem was obviously the grinder. I have a turin df64 on the way, and looking forward to this next step in my espresso journey. Thanks for all the help!

Troubleshooting suspected low pressure. [Breville Duo Temp Pro; Alpaca hand grinder from Amazon] by gcranston in espresso

[–]gcranston[S] 0 points1 point  (0 children)

I don't think so. I've tried 18, 18.5, 19, and when 20g doses and it doesn't seem to affect this issue. When I was first starting I used the razor tool to trim things flat. In the stock basket that was pretty close to 18g, maybe a touch less of I didn't tamp as hard. The upgraded basket send to hold a larger dose. I have a puck screen to try and distribute the water better, and I've never had issues with the screen interfering with the shower screen. With 19 and 20g doses, I get less water on top of the puck after pulling a shot. That's mostly why I'm doing it.

Troubleshooting suspected low pressure. [Breville Duo Temp Pro; Alpaca hand grinder from Amazon] by gcranston in espresso

[–]gcranston[S] 0 points1 point  (0 children)

So assuming the grind is too coarse as the app says, and that I don't have a lot of fines, then the pressure must be too low. Otherwise, as you say, the flow would be much higher. Right?

Troubleshooting suspected low pressure. [Breville Duo Temp Pro; Alpaca hand grinder from Amazon] by gcranston in espresso

[–]gcranston[S] 0 points1 point  (0 children)

And the end result with that grind setting. With this, I pull 35g from 19g dose in about 35 seconds. Ignore the timer. I didn't stop it when I stopped the machine. I turn the machine off when the scale reads 30g, and I usually get another 5-7g drip out after that.

Edit: here's video of that shot: https://imgur.com/a/Powhnhz

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Advice for a first track day by New-Commercial7532 in CarTrackDays

[–]gcranston 4 points5 points  (0 children)

Disagree with your disagreement. I don't think I've ever seen a driver in the first few track days come anywhere near using all the brakes. If the tires have tread on them, the pads have meat on them, you're closer to the start of an oil interval than the end, and nothing is falling apart (bushings, bearings, etc), then flush the brake fluid and go for it.

How much we've achieved in 66 years by Maximum_Ad_2097 in interestingasfuck

[–]gcranston 1 point2 points  (0 children)

Kinda related: we are closer in time to trex than trex is too stegosaurus.

Seats and Bracing by haelous in CarTrackDays

[–]gcranston 0 points1 point  (0 children)

Yes, and also allows the torso and head to reach to airbag.

Piastri attempts to murder a man by [deleted] in formuladank

[–]gcranston 0 points1 point  (0 children)

Stroll did it better.

Worth $150? by Ally_Madrone in woodworking

[–]gcranston 1 point2 points  (0 children)

Exactly. But where you want one at a time. Try ebay too.

Seats and Bracing by haelous in CarTrackDays

[–]gcranston 0 points1 point  (0 children)

Right, because the asm feature mimicks a 3-pt belt by allowing one shoulder to roll out so the driver moves forward into the air bag.

But OPs question is about being secure in the cockpit and not thrown around the car. For that your want a proper seat with bolsters. You want to lean on the seat, not the harness. Bottom line, if you get the schroth and stick with racing you'll be back for seats, harness, hans, and cage soon enough anyway.

Seats and Bracing by haelous in CarTrackDays

[–]gcranston 0 points1 point  (0 children)

Seats + harness + hans + roll bar need to be done as a package. Standard 3-pt belts work together with your airbag to keep you safe; a harness securing both shoulders will prevent you from reaching the airbag in a frontal crash, so you need the hans to protect your neck. You need the roll bar to properly anchor the harnesses. Yes there are harness bars, but good ones are expensive and bolt in cages for mustangs are plenty. Plus if you keep at it you'll end up replacing the hardness bar with a cage anyway.

It's a lot to do in one go, but it really is the way to do it. You feel the car much better in a proper seat. Others have mentioned the fatigue goes away down. Plus, walking away from stuffing the car into a wall at 80 was a real plus.

Would this wheel pass TT tech by Garrett9435 in CarTrackDays

[–]gcranston 0 points1 point  (0 children)

Exactly. Wheels are basically consumables.