Rev Limiter??
Thread Starter
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
Rev Limiter??
Hi Guys/Gals -- I just moved over from the C6 forum as I sold my 12GS and picked up my 2015 C7 A8 Base last week -- Blk/w grey interior (pics up when I can).
Question? Although I just got past my 500 mile (700 on it) the first time I accelerated HARD in D at probably 30mph it picked up 2ond gear but when it shifted it hit right on the rev limiter? I thought at first it backfired then realized that was probably the rev limiter. Got some clear traffic dropped down to about a 10 roll in D -- picked up first gear on the auto down shift - rev limiter hit then shifted, 2ond gear same thing - exhaust popped at rev limiter then shifted at (what seemed like) millisecond later.
Trip to the dealer for a re-flash on the A8? -- or is this Normal Operating?
Anybody else had this on their 15 A8?
Question? Although I just got past my 500 mile (700 on it) the first time I accelerated HARD in D at probably 30mph it picked up 2ond gear but when it shifted it hit right on the rev limiter? I thought at first it backfired then realized that was probably the rev limiter. Got some clear traffic dropped down to about a 10 roll in D -- picked up first gear on the auto down shift - rev limiter hit then shifted, 2ond gear same thing - exhaust popped at rev limiter then shifted at (what seemed like) millisecond later.
Trip to the dealer for a re-flash on the A8? -- or is this Normal Operating?
Anybody else had this on their 15 A8?
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
I believe what you are asking about is the momentary "fuel cut" right at the shift when WOT. It shortens the shift time and is supposed to do that.
This discussion covers the A6 but I believe the A8 has basically the same programming:
https://www.corvetteforum.com/forums...ogramming.html
This discussion covers the A6 but I believe the A8 has basically the same programming:
https://www.corvetteforum.com/forums...ogramming.html
Racer
Joined: Sep 2012
Posts: 408
Likes: 19
From: O'Fallon MO
I just turned 500 miles. The popping sound is from the computer cutting the fuel as the shift occurs. I beleive it has to do with the rapid shifts of the A8. I am sure someone will chime in with a higher tech explaination. I heard about this happening and just performed it yesterday. Kind of sounds like the precision action of a rifle cocking then firing.
Thread Starter
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
I believe what you are asking about is the momentary "fuel cut" right at the shift when WOT. It shortens the shift time and is supposed to do that.
This discussion covers the A6 but I believe the A8 has basically the same programming:
https://www.corvetteforum.com/forums...ogramming.html
This discussion covers the A6 but I believe the A8 has basically the same programming:
https://www.corvetteforum.com/forums...ogramming.html
Ok, thanks I take your word for it. Never noticed it on my A6. The A8 does shift much quicker and more solid. I'll keep an eye on it; I hate to take it in for some tech kid to go out and beat the crap out of my car then say "works ok for me" if you know what i mean - thanks again for the info.
Thread Starter
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
I just turned 500 miles. The popping sound is from the computer cutting the fuel as the shift occurs. I beleive it has to do with the rapid shifts of the A8. I am sure someone will chime in with a higher tech explaination. I heard about this happening and just performed it yesterday. Kind of sounds like the precision action of a rifle cocking then firing.
Racer
Joined: Jan 2002
Posts: 281
Likes: 43
From: Gainesville GA
I believe what you are asking about is the momentary "fuel cut" right at the shift when WOT. It shortens the shift time and is supposed to do that.
This discussion covers the A6 but I believe the A8 has basically the same programming:
https://www.corvetteforum.com/forums...ogramming.html
This discussion covers the A6 but I believe the A8 has basically the same programming:
https://www.corvetteforum.com/forums...ogramming.html
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Thread Starter
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Thread Starter
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi