Proper way to Rev Match

[pinoyplaya]

So, guys. I'm learning how to rev match. Whats the proper way of doing it?

3rd -> 2nd

Say I'm in 3rd gear and want to downshift to 2nd gear.

The way I've been doing it is.... (Method A)

- Driving in 3rd gear
- Press the clutch down
- Shift to 2nd (clutch still down)
- Tap the gas pedal (clutch still down)
- Ease off the gas pedal
- Let go of the clutch (slow or fast?)


I think thats wrong

Or is the right way to do it is.... (Method B)

- Driving in 3rd gear
- Press the clutch down
- Tap the gas pedal (clutch still down)
- Ease off the gas pedal
- Shift to 2nd (clutch still down)
- Let go of the clutch (slow or fast?)

Which way is right? Method A or Method B?


What happens when you don't ease of the gas and just let go of the clutch, isn't that what causes the clutch to slip? I thought when the clutch slips, you can tell by your RPM gauge jumping up and down instantaneously. I havent seen that yet when I'm driving.

Though usually after shifting gears, I ease off the clutch and then apply the same amount of gas as how much I let go of the clutch.

Isnt that the proper way of shifting? Or are you supposed to fully disengage the clutch before you can apply gas?

Thanks XD

P.S. I learned how to drive a stick before I learned automatic. But I never really paid attention to detail. I had no problems with it, but it was a manual without an RPM gauge! It was a 97 Nissan Sentral lol!

[Gen]

Just a standard downshift, no heel toeing...

Clutch in, blip the throttle to desired RPM while shifting to desired gear, release clutch.

Don't feather the clutch...don't slowly let of the gas. These are smooth but quick motions. It's more 'stabbing' the gas with your foot than anything.

[ayau]

this is how i do it:

let go of gas pedal
push clutch pedal all the way down
shift to 2nd while keeping the clutch pedal down
while still keeping the clutch pedal down, blip the gas a little.
let go of the clutch pedal
accelerate

so i do method A. method B seems like the RPMs would drop too quickly. the rate at which you let go of the clutch pedal depends on on how fast you're going. similar to up shifting, you let go of the clutch slower when you're in lower gears.

[mashal]

Any gear, clutch in , downshift to gear while holding clutch down, tap the gas , as soon as your foot comes of the gas pedal release the clutch , once you get good at it you can do all of the above in one second

[pinoyplaya]

Originally Posted by mashal

Any gear, clutch in , downshift to gear while holding clutch down, tap the gas , as soon as your foot comes of the gas pedal release the clutch , once you get good at it you can do all of the above in one second

I see, how fast do you let go of the clutch? I'm used to letting go of it slowly in a steady motion.

[ayau]

Originally Posted by pinoyplaya

I see, how fast do you let go of the clutch? I'm used to letting go of it slowly in a steady motion.

i think it's hard to describe something like that. it's not super slow and it's not super fast. if you can do it smoothly without any jerking motion, then you did it correctly. just test it a couple times yourself. you won't break the car.

[DanVIIIVI]

If you match the revs correctly the car won't jerk or jolt when you release the clutch quickly. If you're downshifting with a throttle blip/rev match to accelerate then the release of the clutch should be quick as you don't want to lose revs or momentum.

If you're downshifting for the purpose of decelerating then a slower realease of clutch would be adviseable and the rev match isn't all that necessary.

[pinoyplaya]

Originally Posted by ayau

i think it's hard to describe something like that. it's not super slow and it's not super fast. if you can do it smoothly without any jerking motion, then you did it correctly. just test it a couple times yourself. you won't break the car.

Okay. Ill give it a shot. I know that your supposed to let go of the clutch slowly only when starting from a complete stop in 1st gear or reverse. So maybe let get of it slightly faster when down and up shifting and when the vehicle is already in motion.

On my old Nissan, I was able to downshift and slowly let go of the clutch and the RPM would just rise itself to the proper RPM. I havent had any jerking problem nor did I apply any gas to rev match.

This BRZ seems different. I jerked a few times downshifting which is weird because I have an RPM gauge unlike the sentra.

[Gen]

Originally Posted by pinoyplaya

On my old Nissan, I was able to downshift and slowly let go of the clutch and the RPM would just rise itself to the proper RPM. I havent had any jerking problem nor did I apply any gas to rev match.

That's feathering the clutch and it's not a good thing. You know how fast you shift when you're moving up a gear? That's how fast you shift going down a gear.

[ayau]

Originally Posted by pinoyplaya

Okay. Ill give it a shot. I know that your supposed to let go of the clutch slowly only when starting from a complete stop in 1st gear or reverse. So maybe let get of it slightly faster when down and up shifting and when the vehicle is already in motion.

On my old Nissan, I was able to downshift and slowly let go of the clutch and the RPM would just rise itself to the proper RPM. I havent had any jerking problem nor did I apply any gas to rev match.

This BRZ seems different. I jerked a few times downshifting which is weird because I have an RPM gauge unlike the sentra.

ya, every car is different.

the reason why you feel that jerking motion is because the engine speed is different than the transmission speed.

for example, when you're cruising in gear, the engine is spinning at 3k rpm, and the transmission is spinning at 3k rpm. when you clutch in to prepare for an upshift, you disconnect the engine from the transmission, and the engine and transmission rpms will begin to differ. going down a gear means you need to increase the engine rpm to match the proper rpm for the lower gear. the closer you can get th rpms to match, the less jerking motion there is.

your old sentra probably didn't jerk very much without rev matching is because the rpm speeds weren't that different when you downshifted.

[pinoyplaya]

Hm... Okay. Ima drive around today and test it out. Its hard to practice during normal driving errands. I think I need to set aside a driving time just to learn it.

Helps gets some mileage on the car too to break it in haha!

[Bonburner]

do what Gen said.
Easy as that, and yes its fast release of clutch.

[denverizzles]

So why exactly is feathering the clutch on a downshift to slow down a bad thing? to down shift and rev match while slowing down doesn't really make sense?

does it wear out the clutch more? bad for tranny? i've always feathered my clutch to slow down...never really thought of it as bad. The only time i'd rev match is if i was trying to accelerate.

[Bonburner]

feathering kills your clutch faster than just dumping it.