Downshifting into corner
#21
I don't believe engine braking slows you down any faster. braking is limited to tire traction and braking bias. So as long as all 4 wheels can apply braking force to the limit of tire traction then that is the maximum you can apply. It doesn't matter if the force is applied by the caliper or the engine.
I don't have data to support this in a Z car, so I can not prove it but I do have supporting data in other cars.
So if X is max force a tire on that corner to take, which component would you rather apply that force? The brake pad or the clutch disc?
I don't have data to support this in a Z car, so I can not prove it but I do have supporting data in other cars.
So if X is max force a tire on that corner to take, which component would you rather apply that force? The brake pad or the clutch disc?
#23
Not if you heel&toe. No data, butt feeling and lap times
- 5th to 3rd with heel and toe
- 5th to 3rd with heel and toe
- 4th to 2rd with heel and toe
- 5th to 3rd with heel and toe
Last edited by GodISmE; 04-26-2018 at 01:27 PM.
#24
Why would you want to save your brakes? They are designed to slow you down.
Engine braking(early downshifting) is not faster at slowing the car down. You risk shocking your driveline and damaging your engine/transmission. Risk over-revving the car. And you also risk rear lockup.
I brake and wait on my shift. I find the car more stable with a delay in shifting gears. I tend to go through the gears but will skip if necessary. And sometimes it is necessary
Reading this thread I see a few posts that have me think that some people are braking with the clutch pressed in. Am I the only reading that? Because that would be a big NO NO!
Engine braking(early downshifting) is not faster at slowing the car down. You risk shocking your driveline and damaging your engine/transmission. Risk over-revving the car. And you also risk rear lockup.
I brake and wait on my shift. I find the car more stable with a delay in shifting gears. I tend to go through the gears but will skip if necessary. And sometimes it is necessary
Reading this thread I see a few posts that have me think that some people are braking with the clutch pressed in. Am I the only reading that? Because that would be a big NO NO!
#25
Not if you heel&toe. No data, butt feeling and lap times
https://www.youtube.com/watch?v=Qh3YmFAcDp0 - 5th to 3rd with heel and toe
https://www.youtube.com/watch?v=eGgCehz92cY&t=3s - 5th to 3rd with heel and toe
https://www.youtube.com/watch?v=kZZsOrGkSrM - 4th to 2rd with heel and toe
https://www.youtube.com/watch?v=TWrY86rTPzQ&t=2s - 5th to 3rd with heel and toe
https://www.youtube.com/watch?v=Qh3YmFAcDp0 - 5th to 3rd with heel and toe
https://www.youtube.com/watch?v=eGgCehz92cY&t=3s - 5th to 3rd with heel and toe
https://www.youtube.com/watch?v=kZZsOrGkSrM - 4th to 2rd with heel and toe
https://www.youtube.com/watch?v=TWrY86rTPzQ&t=2s - 5th to 3rd with heel and toe
Data aquisition is now cheap, I recommend using it for anyone learning or looking to improve. The pros use the data all the Time.
#26
So it seems I accidentally lied. I do have 350z data on one of my archive drives. I am pretty sure Bryan Settle, Randy Probts, and John Evan’s data is in there. I’ll see if I can find it and post some of it here.
#27
New Member
iTrader: (15)
The process of skipping gears, even if you choose to row down and only rev match at the last shift, shouldnt result in more clutch-in time. If it does then it needs to be done quicker or the driver needs to adapt a different technique to help deal with the situations where this conversation is relevant (high entry speed, short brake zone approaches). It is mostly a motion to help keep your mind in sync.
#28
New Member
iTrader: (1)
I run though each gear. One to not over rev which I have done before. And second to use each gear as a gradual engine brake. Like above if you practice enough 5-4-3-2 will not slow you down at all. It just takes time to gain the confidence to heel toe during breaking.
I learned by heel towing daily driving to each stop signs and stops light at normal/slow driving speeds. If you’re very novis I’d just learn down shifting to stops with out the brake, then learn to heel toe, then initiate heel toe later and later to gain the speed and accuracy to down shift in a fast but controlled manner.
I’m sure I’m far off some guys here but it’s now second nature to me on and off track, as well as in my work trucks.
Just always remember take it slow, and perfect practice makes perfect. Forced or bad practice makes bad habits. Like I said take it slow and light try to learn at stop lights. Then bring it to the track when you’re running 70%, then 80% then before you know it you’re doing 110% and not even thinking about it.
I learned by heel towing daily driving to each stop signs and stops light at normal/slow driving speeds. If you’re very novis I’d just learn down shifting to stops with out the brake, then learn to heel toe, then initiate heel toe later and later to gain the speed and accuracy to down shift in a fast but controlled manner.
I’m sure I’m far off some guys here but it’s now second nature to me on and off track, as well as in my work trucks.
Just always remember take it slow, and perfect practice makes perfect. Forced or bad practice makes bad habits. Like I said take it slow and light try to learn at stop lights. Then bring it to the track when you’re running 70%, then 80% then before you know it you’re doing 110% and not even thinking about it.
Last edited by CK_32; 04-26-2018 at 11:08 PM.
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Aeneas137 (10-20-2022)
#29
New Member
Why would you want to save your brakes? They are designed to slow you down.
Engine braking(early downshifting) is not faster at slowing the car down. You risk shocking your driveline and damaging your engine/transmission. Risk over-revving the car. And you also risk rear lockup.
I brake and wait on my shift. I find the car more stable with a delay in shifting gears.
Engine braking(early downshifting) is not faster at slowing the car down. You risk shocking your driveline and damaging your engine/transmission. Risk over-revving the car. And you also risk rear lockup.
I brake and wait on my shift. I find the car more stable with a delay in shifting gears.
Engine braking works fine on the street when you are coasting to a stop, because the RPMs are much lower and you not standing on the brakes. With slow moving traffic ahead I find a downshift is often enough to bleed off excess speed to avoid touching the brakes at all. I tend to still tap the brakes however to alert the driver behind me to the fact that I'm slowing down.
The following users liked this post:
Aeneas137 (10-20-2022)
#31
Why would you want to save your brakes? They are designed to slow you down.
Engine braking(early downshifting) is not faster at slowing the car down. You risk shocking your driveline and damaging your engine/transmission. Risk over-revving the car. And you also risk rear lockup.
I brake and wait on my shift. I find the car more stable with a delay in shifting gears. I tend to go through the gears but will skip if necessary. And sometimes it is necessary
Reading this thread I see a few posts that have me think that some people are braking with the clutch pressed in. Am I the only reading that? Because that would be a big NO NO!
Engine braking(early downshifting) is not faster at slowing the car down. You risk shocking your driveline and damaging your engine/transmission. Risk over-revving the car. And you also risk rear lockup.
I brake and wait on my shift. I find the car more stable with a delay in shifting gears. I tend to go through the gears but will skip if necessary. And sometimes it is necessary
Reading this thread I see a few posts that have me think that some people are braking with the clutch pressed in. Am I the only reading that? Because that would be a big NO NO!
I always brake with the clutch out and I use heel toe when I downshift. I just don't hit every gear on the way down as it would require me to clutch in additional times as opposed to just one and it seems unnecessary.
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roberto350z
2003-2009 Nissan 350Z
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03-04-2004 07:29 AM