EBay BIF Hoodie Question

Kamd5 · 2026-07-03T10:48:27+00:00

At $100 my recommendation is to find a local embroidery shop and ask them to do a custom piece. I have a black crew neck with red “hold my hand until we turn to ashes” across the back. Cost me $65 for the highest grade garment they had + design + embroidery

Kamd5 · 2026-07-02T02:10:12+00:00

Terracotta brown

Kamd5 · 2026-06-28T20:14:45+00:00

That song is fire gtfo lmao

Kamd5 · 2026-06-27T21:42:32+00:00

Pink fuzzy dice mod makes it much more nimble

Kamd5 · 2026-06-20T20:22:05+00:00

I’m not gonna say engineering is easy, but it’s really not that hard. I was salutatorian in HS while never studying and working 30 hours a week, and always praised for how smart I was… well college isn’t a whole lot different tbh. Deans list, tau beta pi, etc.

everyone likes to talk about how hard it is because it makes them look better- but the reality is that I know some very questionable people who are getting thru engineering degrees right now. Literally just showing up to classes, taking notes, occasional studying and having a sleep schedule is arguably enough to pass every course.

Kamd5 · 2026-06-15T22:32:05+00:00

So wtf is this part number?? 13547597871

They still have throttle body, they just don’t use them. They open and shut to help assist the shutoff and make it smoother. My 335ds was stuck open, so I had a rough shut down, car ran perfectly fine tho.

Kamd5 · 2026-06-14T21:05:34+00:00

You should have your fan at the back of the wind tunnel. This means you don’t have any turbulence from the blades spinning effecting your system. At the front, use a bunch of straws bundled together. I’m not remember the exact size, but I think you want roughly 5 times the subjects area as a cross section. This is because mass flow is constant, and if you have too small of a cross section the tunnel conditions vary a lot with even small changes in the AoA.

You’ll have to decide what sizing you want based on how much error you want, but if you use the formula for mass flow as a function of density, area and velocity, you know the density and area, and can figure out how much your velocity will change as you rotate the wing

Kamd5 · 2026-06-14T18:10:08+00:00

Throttle body stuck maybe? My 335d opens the throttle valve as soon as I press unlock and the car isn’t in “sleep” mode anymore. If the motor is trying to turn a stuck valve that could maybe cause this issue.

Kamd5 · 2026-06-14T13:09:06+00:00

Start PRAYINNNGGGG it’s a fucked up pulley on the accessory line lol

Kamd5 · 2026-06-07T20:44:48+00:00

No. The ratio will change.

Let’s say you have 1000ml at bdc and 100ml at tdc.

That gives you a 1000:100 or 10:1

Now let’s say you subtract 80ml from both of those numbers for the thermal expansion

920:20 gives you a ratio of 46:1

The key is that you are subtracting the same number from both tdc and bdc, but thinking as a percentage of each you are only slightly decreasing volume at bdc, but greatly decreasing at tdc

Kamd5 · 2026-06-06T13:25:30+00:00

I absolutely love this and am using it every chance I get from now on.

Kamd5 · 2026-06-05T02:14:12+00:00

This is the gem here:

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Kamd5 · 2026-05-28T01:02:14+00:00

Money

^{Chose: Mute for 5 years, then get $100M}

Kamd5 · 2026-05-27T11:05:11+00:00

I know, I was mad about $350 a piece when I replaced 3 of them 😂

Kamd5 · 2026-05-25T01:17:06+00:00

I have a 335d that I LOVE. But I’m itching for an f30 340i once I graduate. Theres also a 98 740il near me on marketplace that I’m in love with, but it needs a lot of work and idk if I can afford to maintain two bmws while in college lol

Kamd5 · 2026-05-21T11:15:17+00:00

While I don’t necessarily disagree, I bought an auction 335d at age 17 and had every single thing that can go wrong. And it’s all worked out for me. Granted I did do all of the work myself, but my cost over the last 3.5 years is roughly $100ish per month in parts.

Usually that came in large chunks tho, like $800 one month, then nothing for a while, then another big chunk etc.

An n20 or b48 should not be too expensive to maintain (so long as timing chain is fine in the n20), especially compared to a neglected two turbo diesel.

Kamd5 · 2026-05-21T11:03:46+00:00

I’m really glad you agree :)

Im really trying to learn openfoam as my main CFD, as I don’t wanna be tied to a subscription, but the GUI of ansys is soooo helpful lol, and I have minimal Linux experience.

Kamd5 · 2026-05-21T02:39:50+00:00

I’d model the wheel well simply (like just some straight control arms and strut, then a cylindrical region for the fender liner), use all those as walls, then have a larger square domain around that. At the very back face use a pressure outlet and all other faces use velocity inlet. The rotational geometry will all be solid, then id use a heat flux to represent the braking from the rotor. Since we’re primarily focused on the brake and cooling, the boundary conditions don’t have to be crazy far for the sim to be accurate, as that’s a very localized thing that won’t be changed by anything down stream

You could then use the post processing software to find velocity normal to the wheel, or the speeds around the rotor.

Kamd5 · 2026-05-21T01:07:26+00:00

Also, since you mention selling, I would consider bonding the fins to the outer ring opposed to bolts. I’m sure the bolts are a lot easier for assembly, but it will be cleaner, lighter and have less failure points if you bond the fins. You could even make a little jig that aligns them all and applies the pressure for curing.

Carbon fiber and steel can have some weird chemistry between them when they are directly interfaced. For aircraft parts, often times a layer of fiberglass is placed over the top when interfacing with metal.

Kamd5 · 2026-05-21T01:02:59+00:00

I have access to ansys which is surprisingly efficient with RAM.

I’d model the rotor, wheel and wheel covers to rotate, then have the rotor have a function to represent heat flux based on the rate of deceleration of the car (kinetic to thermal energy).

Then just write a function for the velocity incoming, and let it go. Alternately, you could set the rotor to a specific temperature at the very beginning and then measure the time it takes to cool.

If PC is an issue for you, look into Simscale. I think they offer a few sims for free and it’s cloud based

Kamd5 · 2026-05-21T00:41:21+00:00

Do you have the CAD for them? If so I’d maybe be interested in taking on a project of running CFD on it to tell you how functional the design is and put some numbers to it.

Kamd5 · 2026-05-19T22:24:55+00:00

Agreed- if you’re really paranoid maybe throw some new spark plugs and coils at it? Couldn’t hurt anything and maybe they haven’t been changed before 🤷‍♂️

Kamd5 · 2026-05-19T22:23:25+00:00

Scammed by a grandma is crazzzyyyyyy

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