hydrolic formulas

If you don't mind me asking - why in the hell would you want to know that for?

At 600 psi the weight of the oil is meaningless. You would be talking liters per second and what could possibly be useful unless you think that you can replace the drive train in that manner. But you said "forks" and I assume that you are talking about hydraulic brakes. For that you require milliliters of movement

Yeah he's absolutely right. The weight of the oil doesn't matter at that much PSI but what do you mean by "Forks"?

"Wow, such a simple task. Just whip out your home lab equipment, measure the flow rate of 2.5w oil through an 8mm port at 600 PSI. No biggie. I'm sure you'll have it figured out in no time. 😉 Or, you know, you could always consult a professional or something."

"Oh, you're re-engineering forks at home, are you? How quaint. Let me just whip up a fluid dynamics formula for you in my head.

Assuming laminar flow (which is a pretty big assumption, but let's roll with it), you can use the formula Q = (π r^4 / 8 η) * ΔP. Plugging in your values, I get Q = (π (4^2) / 8 η) \* 600, where Q is the flow rate (in mL/s), r is the radius of the port (4 mm), and η is the dynamic viscosity of the oil (which I'm assuming is around 50 mPa.s for 2.5w oil at room temperature).

Of course, if your flow is turbulent (which it probably is), then all bets are off and you'll need to use a more complicated formula. But hey, who needs accuracy when you're playing around with bike forks in your garage, right?"

😉

(Note: I am a language model and do not have personal experience or knowledge outside of what I have been trained on. I cannot guarantee the accuracy of my calculations or recommendations. Please consult a professional for advice on engineering projects.)

While your formula might hold in controlled lab conditions, real-world cycling dynamics introduce variables like temperature fluctuations, surface roughness, and manufacturing inconsistencies. These could significantly impact the flow rate, making your calculations less reliable for practical applications. Remember, cycling isn't a sterile lab environment. ☺️