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seymour

The biggest problem is coolant being acidic due to oxidation. Once it is acidic it will attack all metals such as the radiator, the water pump gasket and bearing, and head gasket. Unfortunately, the head gasket is the hottest. Thus, it might be the first one to be compromised.

seymour

Agreed. I was not being precise. I think people also call this overflow tank. For people, who knows how these things work, there is no ambiguity.
The tank in the picture is obviously open to air. The cooling system is pressurized. In this type of design there is a spring loaded valve that opens ...

seymour

The white bottle is the expansion tank. Yes. you need to fill coolant by opening the radiator. (2nd picture) Only do it when cold.
If you have never replaced the coolant, the coolant may already turn acidic, which causes corrosion.
You may want to replace allcoolant ASAP. Acidic coolant may eat ...

seymour

I think I may know where the confusion came from. I do not know much about turbo fan. When you compute work done by turbo fan, the final pressure is probably the outside pressure. Thus, it is understandable you multiply the two. In a reciprocating engine, only the power stroke does work. The high ...

seymour

I think you confuse the coolant line to the turbo in the exhaust to the intercooler at the intake.
I think the link below is for a chevy cruze. It looks to me like a liquid cooled system from the picture. Not sure if this is a single-loop system that shares engine coolant.

https://eliteracefab ...

seymour

I think you confused power output with efficiency. A turbo without intercooler on an older motor might work.
All newer engines run very close to pre-ignition limit. The reason manufactures switch to direct injection is the cooling effect when fuel vaporizes, which prevent auto-ignition. There is ...

seymour

Melee 写了： 2025年 8月 8日 21:18
燃料跟热机的效率没有关系

well fair enough. It is probably better say the jet engine turbofan design gives higher efficiency. Not the fuel. Just as diesel engine has better efficiency due to the direct injection design, which allows better compression ratio. It not fair to say it is due the to diesel fuel.

seymour

I believe the single-loop design is to share the reservoir but use a separate radiator and pump. The radiator cools down the coolant before the coolant enters the intercooler. It is to reduce cost for mild boost turbo.

seymour

Melee 写了： 2025年 8月 8日 20:28 学点热力学再来扯吧
整个现代航空业就是建立在涡轮增压的基础上
你比NASA还懂

It is jet fuel not turbo that gives jet engine better efficiency. The idea of turbo is to produce more power with a smaller engine.

seymour

Just to remove the confusion in the most plain language. The efficiency of an ideal otto cycle is 1-1/R, where R is the compression ratio. (V_BDC/V_TDC). This efficiency is neither a function of the pressure nor a function of the temperature. Thus it does not care what pressure the intake stoke has ...

seymour

It does not make sense to multiply turbo compression with the compression ratio of the engine. The only part that performs work is the power cycle, where the engine goes from TDC to BDC. The power cycle does not expand all the way to original air volume. Yes the exhaust runs the turbo, which does ...

seymour

Of course, without an intercooler, a 2.0 L turbo will give the same amount power as a 1.9 L NA. It is easy to understand that no practical size intercooler can actually cool all the way to ambient. There are air-cooled and liquid-cooled intercoolers. For liquid-cooled intercooler, you pray it ...

seymour

Turbo engines generally have lower compression ratio as the intake air is hotter after being compressed. However, it has a smaller displacement thus requires less fuel during low load stages such as cruising. In other words, the turbo engine is more efficient compared to a bigger NA engine when the ...

seymour

ShuiNi 写了： 2025年 4月 18日 20:52 因为接口生锈了，所以信号传导不良，导致dashboard 上的ABS和刹车灯都亮了。接口可以看到绿色的锈。

Google D5 cleaner.
Spray with D5, plug and and unplug a few times and then spray more.
You can also use a tooth brush.

seymour

I am not an expert on additives. I think seafoam has a good reputation. If you want to try it, let us know if it helps. Try to switch to a fluid thinner at low temperature should help.

seymour

The casing for the rotary pump is not a perfect circle. As the pump turns, the fluid is pushed into a smaller space to increase the pressure. The vanes slide inside grooves to conform with the shape of the enclosure as the rotor turns. When the pump stops, the top vanes will fall down due to ...

seymour

When you are coasting at 45 mph, the torque converter is locked up. Yes, the ECU will turn off the injector. air fuel ratio is infinity.

seymour

Are you using the right type of fluid? If so, it's important to address the belt slipping problem. In addition, you may need a new power steering (PS) pump. The power steering pump has vanes in grooves that don't push fluid until spinning fast enough. Too-thick fluid or
contaminants could prevent ...

seymour

With 512 GB of RAM, you're limited to running the 671b model at q4km or potentially q5km with a reduced context window. I
find deepseek not to be very useful when using a tiny context window as those used by ollama. Also, hardware configuration details are not
particularly useful without the ...

seymour

With 512 GB of RAM, you're limited to running the 671b model at q4km or potentially q5km with a reduced context window. I
find deepseek not to be very useful when using a tiny context window as those used by ollama. Also, hardware configuration details are not
particularly useful without the ...

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