A week ago I've ordered second version of RJ booster (no lip) for MD mount, since I have a sizeable MD lens collection and want to have a backup if my A7 decides to break down again. My plan was to let it sit collect dust, so I wasn't willing to spend twice as much for another LTII.
The issue sounds like the one Sony RJ had (have?) with MD lenses. The lens aperture pin jams against the booster. Companies who design these boosters definitely don't have a full lens lineup to test with, and they often screwed up something. I think Metabones could have justified their price tag with buying more vintage glass for testing, but sounds like they weren't very diligent either.
I've had a problem with my LTII FD: it could not mount some FDn lenses due to overly large stop down pin on the booster. I've looked closely and realized I can cut something like 2mm and it won't break compatibility with existing lenses. And so I did. Worked with every FD lens I've had ever since.
Yeah I'm a newb in general (the forum and working on cars). Anyways I bought a 71 510 wagon that already had a KA24E swap done. After driving it a couple a couple of times,my friend (my auto knowledge source) and I started to take a real close look at the work done. Needless to say, one thing led to another and I decided to throw a turbo on it.
This 510 has a vacuum assisted brake master cylinder that gets its vacuum from the intake manifold. Since I'm installing the turbo, this will cause the manifold pressure to go from negative to positive while under boost (so goes my theory goes).
First of all you are not likely to be boosting while you are braking. Second, there is a one way valve (or should be) in the brake booster line. It allows air to be sucked out of the booster but you can't push air into it. In a properly running booster there is enough vacuum stored for at least one good stab of the brakes, enough for the BOV to begin working and manifold vacuum to rise..
I've been racking my brain over it the past few days and was wondering why a couple was used inline with the brake booster vacuum line. I'm pretty sure you've just verified it as a one-way check valve.
This lens turbo adaptor may not fit all lenses due to different extensions at the lens rear mount. Lenses with extension more than 3mm are not recommended to use this lens turbo adaptor.
-lens-turbo-for-sony-e-mount-cameras-sony-nex-a7/
I have seen a recommendation to disable turbo boost for multi core performance improvement.here, section 7.1.2.This is the exact wording from link:Disable Turbo Boost to ensure the performance scaling increases with the number of cores. I always thought more clock speed means more ups and more performance. So turbo boost should always help or at least shouldn't harm performance of system. But this recommendation is very surprising. Any thoughts on this point?
Disabling turbo will indeed make the performance ratio between single-core and many-core more predictable (scaling), but it does so by slowing down single-core, not by speeding up multi-core.
The IDF talk about Skylake Power Management pointed out some gains in a few benchmarks (e.g. JavaScript) from saving more power between bursts, so it could turbo more of the time when there was work to do. (Skylake can reclock itself much faster than Broadwell, because it can do all its own power management internally instead of having the OS choose the clock speed for levels below max/turbo.)
Intel continues to push the turbo power limits higher and higher, which means more heat and noise when the CPU enters high turbo boost states. The CPU does adjust its speed dynamically based on load, but it is (IMO) a bit too eager to hop to high turbo boost speeds when the workload does not call for it. Web browsing / office workloads do not really need turbo boost speeds, and there may be times when you would be willing to sacrifice speed for quiet. You can save yourself some power/heat/noise by having the CPU run at the base clock speed.
So, here are a few tricks that you can use to enable and disable turbo boost on the fly. I personally run my laptops with turbo boost disabled, using one of these methods, and I flip turbo boost on only if I need additional CPU power (maybe gaming, intense database work, or some other kind of number crunching).
With this setup, turbo boost is disabled. You can confirm by checking the Task Manager "performance" tab. The CPU speed should stay below the CPU's base frequency (probably mid-2 GHz range, depending on the CPU model), no matter what load you throw at it.
...You can set the maximum processor state value to something lower than 99% if you find that simply disabling turbo boost is not effective in achieving your desired power/heat/noise limit. Lower values will further reduce the maximum CPU speed. Moving the power slider to the right will also still remove any limits on the CPU speed.
Set the maximum processor state to 99% on the "Balanced" profile (as described above), but leave it at 100% on the "High Performance" profile. Now, turbo boost is disabled if you are in the "Balanced" profile but enabled if you are in the "High Performance" profile. You can switch between the two on the fly.
Now, switching between the Balanced and High Performance profiles will disable or enable turbo boost as described in the previous section. However, using the power slider to dynamically enable or disable turbo boost does not work with this method. If you want to use the power slider then you must set "Maximum processor state" to 99%.
In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the engine in order to produce more power for a given displacement.[1][2]
The current categorisation is that a turbocharger is powered by the kinetic energy of the exhaust gases, whereas a supercharger is mechanically powered (usually by a belt from the engine's crankshaft).[3] However, up until the mid-20th century, a turbocharger was called a "turbosupercharger" and was considered a type of supercharger.[4]
Prior to the invention of the turbocharger, forced induction was only possible using mechanically-powered superchargers. Use of superchargers began in 1878, when several supercharged two-stroke gas engines were built using a design by Scottish engineer Dugald Clerk.[5] Then in 1885, Gottlieb Daimler patented the technique of using a gear-driven pump to force air into an internal combustion engine.[6]
The 1905 patent by Alfred Büchi, a Swiss engineer working at Sulzer is often considered the birth of the turbocharger.[7][8][9] This patent was for a compound radial engine with an exhaust-driven axial flow turbine and compressor mounted on a common shaft.[10][11] The first prototype was finished in 1915 with the aim of overcoming the power loss experienced by aircraft engines due to the decreased density of air at high altitudes.[12][13] However, the prototype was not reliable and did not reach production.[12] Another early patent for turbochargers was applied for in 1916 by French steam turbine inventor Auguste Rateau, for their intended use on the Renault engines used by French fighter planes.[10][14] Separately, testing in 1917 by the National Advisory Committee for Aeronautics (NACA) and Sanford Alexander Moss showed that a turbocharger could enable an engine to avoid any power loss (compared with the power produced at sea level) at an altitude of up to 4,250 m (13,944 ft) above sea level.[10] The testing was conducted at Pikes Peak in the United States using the Liberty L-12 aircraft engine.[14]
The first commercial application of a turbocharger was in 1925, when Alfred Büchi successfully installed turbochargers on ten-cylinder diesel engines, increasing the power output from 1,300 to 1,860 kilowatts (1,750 to 2,500 hp).[15][16][17] This engine was used by the German Ministry of Transport for two large passenger ships called the Preussen and Hansestadt Danzig. The design was licensed to several manufacturers and turbochargers began to be used in marine, railcar and large stationary applications.[13]
Turbochargers were used on several aircraft engines during World War II, beginning with the Boeing B-17 Flying Fortress in 1938, which used turbochargers produced by General Electric.[10][18] Other early turbocharged airplanes included the Consolidated B-24 Liberator, Lockheed P-38 Lightning, Republic P-47 Thunderbolt and experimental variants of the Focke-Wulf Fw 190.
The first practical application for trucks was realized by Swiss truck manufacturing company Saurer in the 1930s. BXD and BZD engines were manufactured with optional turbocharging from 1931 onwards.[19] The Swiss industry played a pioneering role with turbocharging engines as witnessed by Sulzer, Saurer and Brown, Boveri & Cie.[20][21]
Automobile manufacturers began research into turbocharged engines during the 1950s, however the problems of "turbo lag" and the bulky size of the turbocharger were not able to be solved at the time.[8][13] The first turbocharged cars were the short-lived Chevrolet Corvair Monza and the Oldsmobile Jetfire, both introduced in 1962.[22][23] Greater adoption of turbocharging in passenger cars began in the 1980s, as a way to increase the performance of smaller displacement engines.[10]
Like other forced induction devices, a compressor in the turbocharger pressurises the intake air before it enters the inlet manifold.[24] In the case of a turbocharger, the compressor is powered by the kinetic energy of the engine's exhaust gases, which is extracted by the turbocharger's turbine.[25][26]
The turbine section (also called the "hot side" or "exhaust side" of the turbo) is where the rotational force is produced, in order to power the compressor (via a rotating shaft through the center of a turbo). After the exhaust has spun the turbine it continues into the exhaust and out of the vehicle.
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