Nacho wrote:Getting mixed responses when asking this question. Good or bad....and why?
A penny for your thoughts?
Engine braking in general is not good. You have brakes for stopping, and gears for going. Cheaper to by new pads then rebuild a gearbox or a clutch.
The quickest way to stop is actually without engine braking, as when you engine brake the brakes not only stop your car but have to slow your engine down too.
However, "down shifting" is used into corners (via heal-toe'ing) to match engine revs and not have more unnecessary movement to upset the balance of the car. As an example; if your on a high speed mild corner trying to downshift into 2nd without rev-matching you are probably going to overseer. (weight distribution going to the front)
The other reason is to be in the right gear at the correct RPM when exiting a corner, which is the main reason for downshifting. (which causes engine braking)
If you see a light ahead go red, use your brakes. If you are entering a corner cruising, use your brakes. If you are on the track or are going for it downshifting is ok for keeping your RPM up for the corner exit.
Hope this explains thing a little bit more, this is just what has been explained to me over the years. What you do is personal preference, and I apologize for the rant and the loss of your brain cells.