Downshifting. is it safe?
If you want to see some good footwork, check out some Best Motoring battles on youtube 
Really you can explain Heel-Toe all you want but I found watching a video really helped me when I was new.
http://www.youtube.com/watch?v=bHtgnZIxNHc&feature=plcp

Really you can explain Heel-Toe all you want but I found watching a video really helped me when I was new.
http://www.youtube.com/watch?v=bHtgnZIxNHc&feature=plcp
Good call. The first time I understood what heel and toeing was, was on a mountain run. Once you hear the noise you know what to do.
For the vast majority of those who drive manual transmissions, blipping the throttle is just fine on a downshift.
Doing that speeds up the input shaft and layshaft (they run at the same speed all the time) and brings it closer to the speed of the main shaft. The amount of wear this probably saves on your synchros is negligible, however, the most noticeable benefit is just simply smoothing things out.
Doing that speeds up the input shaft and layshaft (they run at the same speed all the time) and brings it closer to the speed of the main shaft. The amount of wear this probably saves on your synchros is negligible, however, the most noticeable benefit is just simply smoothing things out.
HOLD on, isn't all that stuff on F&F true hehe
I wouldn't always rev match while driving in traffic as you can easily over time prematurly wear out the clutch. when driving normal, downshift normally and throw it in neutral to a stop. Never have your clutch in at a stop light or at rest, as that will also over time kill the clutch. Just dont do what 95% of people do when driving and you'll be fine.

I wouldn't always rev match while driving in traffic as you can easily over time prematurly wear out the clutch. when driving normal, downshift normally and throw it in neutral to a stop. Never have your clutch in at a stop light or at rest, as that will also over time kill the clutch. Just dont do what 95% of people do when driving and you'll be fine.
Here's the percentage (for AP1) of how much higher you should rev when you are downshifting
6th -> 5th : around 20% (actual 19.753086%)
5th -> 4th : around 20% (actual 19.690721%)
4th -> 3rd : around 30% (actual 27.562446%)
3rd -> 2nd : around 40% (actual 38.082376%)
2nd -> 1st : around 55% (actual 53.202934%)
Example 1
if you're in 6th gear cruising at 3500 rpm and you want to downshift to 5th
Then you should rev up an extra 3500*0.2=700, or in total 4200 rpm
Example 2
if you're in 4th gear and you're at 4000 and you want to downshift to 3rd
Then you should rev up an extra 4000*0.3=1200, or in total 5200 rpm
You should always try to rev a little more than the actual rpm due to the momentum in the gears
Taking example 1 again, the rpm you're suppose to rev up to is 4200, but you may want to rev up to say 4500. Since there's a split second in between the rev match and letting go of the clutch, the rpm still drops within this split second.
6th -> 5th : around 20% (actual 19.753086%)
5th -> 4th : around 20% (actual 19.690721%)
4th -> 3rd : around 30% (actual 27.562446%)
3rd -> 2nd : around 40% (actual 38.082376%)
2nd -> 1st : around 55% (actual 53.202934%)
Example 1
if you're in 6th gear cruising at 3500 rpm and you want to downshift to 5th
Then you should rev up an extra 3500*0.2=700, or in total 4200 rpm
Example 2
if you're in 4th gear and you're at 4000 and you want to downshift to 3rd
Then you should rev up an extra 4000*0.3=1200, or in total 5200 rpm
You should always try to rev a little more than the actual rpm due to the momentum in the gears
Taking example 1 again, the rpm you're suppose to rev up to is 4200, but you may want to rev up to say 4500. Since there's a split second in between the rev match and letting go of the clutch, the rpm still drops within this split second.






