Rev Match Every Down Shift?

[actionstan]

Those of you who drive/have driven a stick, did you typically rev match every down shift?

For a while I was double clutch rev matching every down shift. Lately I have stopped however.. If I'm slowing down to take a curve I'll typically drop to a lower gear at about 1200~ rpm which puts me into the next gear at about 1600 rpm. There is little to no 'jerk' and I'm not using gas to rev match. I still rev match if I need a lower gear to gain speed to avoid a hard jerk due to the higher rpms.

I feel like my current habit is more economical than rev matching every down shift.. But maybe I am putting more wear on my clutch than I realize?

What are your thoughts bitog?

 

[dparm]

Seems unnecessary on a synchronized transmission. I almost never did it in any of my cars.

 

[yonyon]

Rev matching every downshift is for truckers, racers, and people blessed with tiny feet.

 

[KitaCam]

Syncros these days are very effective/efficient...at least they've been in my last 3 cars, 2 altimas and the camry driven close to 300k miles...

If I'm in a high gear at a low RPM, and planning on downshifting to adjacent lower gear's higher end of cruising RMPs (e.g.from 4th to 3rd at 40mph, the higher end of 3rd's comfort zone), I generally don't double clutch...though I will goose/nudge the accelerator just a bit between notches for a smooth downshift...

I will double clutch if I have to downshift TWO gears though...though I've had to do that only very rarely.

 

[901Memphis]

The Stingray and 370Z have auto rev matching!

 

[shDK]

I have never driven anything but manual transmission cars. And I have never ones used double clutch. If I downshift from let's say 5 to 3 gear in a quick takeover. I usually floor the gas pedal at the same time I drop the cluch. That makes good smooth shifts without any jerks.

 

[GutsyGecko]

I rev march every shift. All that clutch wear adds up. It's also not as silky smooth of a ride.

 

[eljefino]

My synchros are shot in 1st and 2nd, so, yes, into those gears. This habit carries over if I'm driving a car with good ones.

 

[KrisZ]

I don't double clutch and let the synchros do their work. As for rev. matching I do it when I know the next lower gear will put me around 1600k RPM or higher for a smooth downshift. Below 1600RPM I don't rev. match and just engage the clutch a bit slower to allow for a bit of slip.

 

[A_Harman]

I rev match every downshift, but only single-clutch it. I used to do double-clutching, but gave it up to save time between shifts.

 

[CHARLIEBRONSON21]

Originally Posted By: KrisZ
I don't double clutch and let the synchros do their work. As for rev. matching I do it when I know the next lower gear will put me around 1600k RPM or higher for a smooth downshift. Below 1600RPM I don't rev. match and just engage the clutch a bit slower to allow for a bit of slip.




Man that thing is spinning fast!

 

[SwampSurvivor]

I do. Not race car or truck. I'd rather use my throttle to speed my engine up than my clutch.

The two vehicles I learned to drive manual on were a F250 with really worn out transmission (had to be double clutched) and a Peterbilt 379.

As a result of learning partially on a class 8 tractor, I never press the clutch fully to the floor when moving.

 

[KrisZ]

Originally Posted By: CHARLIEBRONSON21
Originally Posted By: KrisZ
I don't double clutch and let the synchros do their work. As for rev. matching I do it when I know the next lower gear will put me around 1600k RPM or higher for a smooth downshift. Below 1600RPM I don't rev. match and just engage the clutch a bit slower to allow for a bit of slip.




Man that thing is spinning fast!


That's when the v-tak kicks in yo!

 

[badtlc]

no.

 

[datech]

If I wanted to make a downshift with a big speed / rpm difference, I might do that. Usually I just downshift to make the engine speed more reasonably close to match my road speed.

Brakes are a lot cheaper than clutches, so I don't downshift to control speed, etc.

 

[NateDN10]

I don't double clutch, but I do rev-match on downshifts. Makes for a much smoother ride.

 

[suspiciousmind]

I downshift often but usually not too aggressively.

I rarely rev match. My thinking is, the interaction (scrubbing)of the clutch/pressure plate is opposite of normal acceleration. I believe the opposite rubbing is likely healthy for the friction surfaces...reducing crystallization perhaps.

I've been doing this for a looong time and have never worn out a clutch yet. I've grenaded a couple but not due to downshifting.

 

[d00df00d]

Every. Single. Downshift. Double-clutched and blipped (if not also rev-matched). No exceptions.

 

[redbone3]

Originally Posted By: datech
If I wanted to make a downshift with a big speed / rpm difference, I might do that. Usually I just downshift to make the engine speed more reasonably close to match my road speed.

Brakes are a lot cheaper than clutches, so I don't downshift to control speed, etc.


The same words of wisdom I heard from my father 50 years ago.

 

[Mr_Incredible]

I recommend it, myself. But don't abuse it.