Comments by "Makan Tahi" (@makantahi3731) on "Is It Bad To Engine Brake With A Manual Transmission?" video.

  1. Hello to everyone All you said is not black and white, it is grey-to explain I had car with carburator and LPG and I could cut off all fuels, and I used that options for for long downhill engine braking -it brakes some 20 percent more than I left to burn fuel on idle (in same gear)downhill, and temperature gone down for 5-10 deg C. I have car with fuel injection (automatic trans)and I can monitor mixture on display-when I brake, ECU sets how much fuel will go to engine to burn and it changes with many things-is applied brake or not, speed, in what gear is.. Engine braking is not for fuel saving, it is for brake saving from overheating and wearing, to be able to brake hard if is needed
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  2. One more thing for first case when went downhill with no fuel and braked with engine, difference between idle and full gas was negligible so there is no difference between compressing small and big amount of air, but because of vacuum inside cylinder , oil from piston rings could come to combustion chamber and is better to brake with engine on full gas and fuel cut off
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  3. first notice is ok, but second and third are not. chrysler 300c 5.7 has 4 cylinder deactivation in driving condition with low load to save fuel because do not need 8 cylinders for low speed drive- they call it elastic spring-if it slows down or need extra power to rotate engine it would have no sense to deactivate 4 cylinders. it is same braking effect if compresses much of air or nothing in one case it need energy to compress air but when it expands it returns energy to engine, in other case it needs less energy to compress vacuum and it returns less energy in expansione stroke, ..žiš-ku ri-sta
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  4. to parilla you do not need it if you do not descent from mount everest. engine braking is not invented to make fuel saving, on idle engine consumes in one hour less than 20% of fuel that is consumed for flat road at 60mph it is here to save brakes from overheating when car goes on long down hill. what is the longest downhill you drove-10-20 minutes , so if you cut off fuel supply at all , you could save less than 1 liter of fuel-you spend more fuel to heat up engine to reach operating temperature-so it would be cheaper to have external heaters to heat engine to some 60 deg c before start the engine
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