2014 Rev match update/ Can it be done?
10-20-2017, 03:15 PM
#21
Melting Slicks
Thread Starter
I am not passing up, as I said I have a deposit on it, and should be picking it up tomorrow. That being said, I would like to know as I am a technical guy and like ot know details ha
10-20-2017, 03:23 PM
#22
Burning Brakes
10-20-2017, 04:11 PM
#23
However, technically speaking, it does work incredibly well even in the '14, absent operator error. I've driven three C7 (one each 2014, 2015, and 2016) M7s, and can't tell a dime's worth of difference.
Last edited by Foosh; 10-20-2017 at 04:14 PM.
10-20-2017, 06:22 PM
#24
Race Director
The rev match (manual) is quicker on the 2015 than the 2014. I have a manual 2014, a good friend has a manual 2015 and it is NOTICABLY quicker than my car. To not answer the OP's question: I am not aware of a software update that would bring the 2014 to 2015- standards.
Last edited by jimmyb; 10-20-2017 at 06:23 PM.
10-20-2017, 06:33 PM
#25
One truism about car reviews and comparisons is that there is almost never a consensus. I've seen no difference in ARM performance between MYs. I think a "noticeable" difference may be somewhat overstated. Many differences are imagined, even though one's perception may be honestly stated.
I suppose in the interests of full disclosure I should note that my 2014 was one of the last 14s built in 7/14 before the MY changeover. Tweaks are often made within MYs, and it's entirely possible that the software in my 14 is the 15 and later ARM version. All I know is that I don't know how it would be possible for it to perform any better as the rev matches are perfect.
I suppose in the interests of full disclosure I should note that my 2014 was one of the last 14s built in 7/14 before the MY changeover. Tweaks are often made within MYs, and it's entirely possible that the software in my 14 is the 15 and later ARM version. All I know is that I don't know how it would be possible for it to perform any better as the rev matches are perfect.
Last edited by Foosh; 10-20-2017 at 06:45 PM.
10-20-2017, 08:08 PM
#26
Tech Contributor
Member Since: Oct 1999
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What really counts is doesn't make a difference if it is faster. When downshifting you are on the brakes and have time to move the lever down at least one gear. It is a difference that really doesn't affect operation. If you don't have it you won't miss it and if you do have it you won't know you do have it.
Bill
Bill
10-20-2017, 11:35 PM
#27
Exactly, faster is not necessarily better. It's the rev match that counts, and if its so smooth it doesn't unsettle the chassis at all, it's a perfect match. That's the way it feels in my car.
10-21-2017, 04:48 AM
#28
E-Ray, 3LZ, ZER, LIFT
Member Since: Sep 2007
Location: NE South Carolina
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One truism about car reviews and comparisons is that there is almost never a consensus. I've seen no difference in ARM performance between MYs. I think a "noticeable" difference may be somewhat overstated. Many differences are imagined, even though one's perception may be honestly stated.
I suppose in the interests of full disclosure I should note that my 2014 was one of the last 14s built in 7/14 before the MY changeover. Tweaks are often made within MYs, and it's entirely possible that the software in my 14 is the 15 and later ARM version. All I know is that I don't know how it would be possible for it to perform any better as the rev matches are perfect.
I suppose in the interests of full disclosure I should note that my 2014 was one of the last 14s built in 7/14 before the MY changeover. Tweaks are often made within MYs, and it's entirely possible that the software in my 14 is the 15 and later ARM version. All I know is that I don't know how it would be possible for it to perform any better as the rev matches are perfect.
I had an early build C7, Z51, September 2013. I drove that car for 3 1/2 years using rev match 95% of the time! There no perceptible difference between it and my 2017 Grand Sport where I also use rev match 95% of the time.
Been following rev match on this and other forums since the first C7’s were made. The issues raised appear to me related to not following what must be done to be sure it works correctly, like being sure the shift lever is placed “only” in the intended next gear and even gate when in neutral.
My observation: even when in the neutral gate, if the lever is moved slightly toward say the 1st/2nd gate when the intent is to downshift to 3rd, the engine will overrev to match what would be needed for 2nd gear rpm. The sensors are trying to anticipate where you will be shifting even before the lever is placed in that gear slot!
Frankly don’t recall any rev match software issues, although there could have been some. If so, had no effect on my two Vettes and I commonly downshift skipping a gear in normal driving where a smooth transition is needed. I will shift from 7th exiting an Interstate directly to direct-drive 4th, skipping the two other overdrives, 6th and 5th. Rev match increases the engine rpm perfectly and very quickly.
PS: Upshifts are another story. Frankly I generally shift fast enough that I don’t perceive it doing anything different than in my C6 Z51, and every other DD I have owned, all of which were standard shifts! I take my foot off the accelerator when shifting. Rev match does nothing differently to slow the engine rpm than having the throttle butterfly closed. In a test, I did find if shifting very slowly where the engine rpm would reduce below that needed for the next higher gear, it would hold the correct rpm for perhaps 2 seconds. Never shift that slow!
Last edited by JerryU; 10-21-2017 at 05:21 AM.
10-21-2017, 04:20 PM
#29
10-21-2017, 04:25 PM
#30
I'm pretty sure people who are having problems are keeping their foot on the throttle, even just slightly. The manual clearly says it doesn't operate w/ throttle input.
10-21-2017, 07:42 PM
#31
Le Mans Master
The only comment I have seen about the difference in rev matching is that the old programming just blipped the throttle, and the new version holds the RPM to give you more time to shift. I think the Camaro was already like that and GM just made them the same.
Last edited by TEXHAWK0; 10-21-2017 at 07:46 PM.
