Foosh

Yes, but there is a little slower, and then there is completely missing the blip by shifting like a sloth.

BEZ06

Thanks - you're right, and I edited my post to be correct.


Nope!!! You need to double-clutch anything with straight cut gears - or maybe not necessarily push the clutch in when you shift to neutral, but you definitely need to do a throttle blip to rev match before shifting to the lower gear. Take a look at the video below of Joey Logano driving a NASCAR race on the Watkins Glen roadcourse.

The video shows his footwork where he's left foot braking and not using the clutch at all - not for up or downshifting.

However, with the straight cut gears in the dog box transmission with no synchromesh, he MUST shift to neutral then give a good throttle blip to match the revs so when he shifts to the lower gear it smoothly goes into gear with no jerking of the driveline. You can hear the commentator talking about how if he doesn't blip the throttle to rev match "it will break the rear end, break the transmission" and "wheel hop it".

I always double-clutched in the old VW Beetle - pushed in the clutch when shifting out of the helical cut synchromesh 2nd gear, let out the clutch when giving a throttle blip, then clutch back in when shifting down into straight cut 1st gear that didn't have synchro. Logano doesn't use the clutch at all, except when starting out or coming to a stop in the pits:



It's really nice to have the ARM give us the exact correct matching revs when downshifting so it's perfectly smooth when we engage the clutch after the shift is complete!!!

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gthal

My experience is ARM is pretty darn good. I have spent many hundreds of hours on the track and heel/toeing is pretty second nature but in my C7, the car did it better than I could. Well, let's put it this way... the car got it exactly perfect 99.5% of the time and I got it exactly perfect maybe 90% of the time

What I like best is the sound the car makes on downshifts even when just tooling around town. It's awesome. I don't drive to the super market and bother to heel/toe at every corner but when the car is doing it, I get to enjoy to lovely sound of the engine/exhaust like I was still at the track

Foosh

You said it well, and it reflects my experience, as I mentioned above. I also practiced heel/toe extensively on street and track and got to the point where I could nail it 80-90% of the time, but the car nails it 99.9% of the time with a lot less ankle strain.

Bill Dearborn

It gets the rpm high enough you don't have a problem and not so high you speed the car up on the downshift. I had been heel/toeing for 15 years when the EBCM in my C5Z failed at the Glen and I didn't have ABS. I didn't think anything of it until I was braking into T1 and downshifting. I put in the clutch, moved the shifter into 4th, blipped the throttle with the side of my right foot and let the clutch out and the car immediately stepped sideways as I didn't rev the engine high enough. I couldn't figure it out at first and then realized I wasn't adding enough rpms. The slight engine drag due to slightly lower than necessary revs combined with the rear brakes to cause the wheels to lock up. The ABS system had been covering for me for years. As soon as it sensed the rear wheels starting to lock it let up on the rear brakes which reduced the drag on the rear tires and let them maintain traction. After that I always revved the engine until I could hear it much louder than before. That prevented under revs but it did tend to induce a few over revs.

Rev match does away with all of that.

Bill

speedlink

Ah ha a tendem bicycle!

village idiot

ARM is perfect imo. Is your car modified?

I dropped it from 5th/+150mph to 2nd/40mph over and over again at COTA and it was nothing but absolutely perfect.

My only complaint is it doesn't work under 16mph.

Skid Row Joe

Thanks for the info/reminder. ^^

Q: Are our C7's top end speed governed?

Foosh

No, just power and aero-drag governed.

mschuyler

On the track Rev Match is a Godsend. It takes out the worry. Let your body muscle memory shift and concentrate your mind on the turn. At this point I wouldn't want to live without it. But on the street I really don't like it (or use it) I'd just rather do it myself. I can't quite explain it, but Rev Match is taking something away from the manual experience.

Foosh

I thought that might be the case initially, but I've changed my mind. I don't feel like I'm missing any part of the manual experience.

Skid Row Joe

Thx.

BEZ06

Yep, it really works great even when skipping gears on the downshift!!

The rev limiter will protect you when accelerating, but you definitely need to be careful when skipping some gears downshifting so you'll be below the max speed for the lower gear you're going into.

You can definitely over rev it if you downshift when going too fast for the gear.

Max speed in my Z06 is roughly 1st about 60, 2nd about 90, 3rd abouth 120, 4th about 150 mph, and 5th about 185 - I make sure I'm below the max speed for the lower gear before shifting down into that gear. At Daytona even going down from 5th to 3rd I need to make sure I've slowed enough so I'll be below 120 when I let the clutch out.

So....anybody new to the ARM, it won't protect you if you downshift and let the clutch out when going faster than the max speed for the lower gear - you can over rev the engine when downshifting.

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falcon5619

ARM works great for me. Makes for perfect rev matches every time.

village idiot