A8 Shift RPM
Melting Slicks
Joined: Nov 2014
Posts: 2,204
Likes: 17
From: Fayetteville North Carolina
St. Jude Donor '15
Not 6500 that's for sure lol. Each gear is different, 1-2 and 2-3 are a little earlier, 3-4 and 4-5 are much closer to redline.
I've wondered since I got my car if this was a display issue, if the engine really is shifting at 6500 and the tach just doesn't respond quick enough to display it accurately, or if it's really being lazy.
I need to data log mine and find out for sure, for drag racing I would want it to shift right up against the limiter every time.
Has anyone with a tune noticed a change in shift RPM?
I've wondered since I got my car if this was a display issue, if the engine really is shifting at 6500 and the tach just doesn't respond quick enough to display it accurately, or if it's really being lazy.
I need to data log mine and find out for sure, for drag racing I would want it to shift right up against the limiter every time.
Has anyone with a tune noticed a change in shift RPM?
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
My 2015 A8 Base ZF1 tires with T/C off, in Competitive Driving mode in D as recorded on my PDR shifts consistently at 6200/6300 1 to 2, 6200/6300 2 to 3 and 6300/6400 3 to 4.
Pure stock, no tune 30lbs tire pressure and about 65 to 72 degrees F.
I found this by playback on the video and stop framing as the tach increased through each gear. It happens a little too quick to eyeball it.
Speeds were 42 (1 to 2), 68 (2 to 3), and 94 (3 to 4). Sorry haven't had enough room to take it any higher.
My timed 0-60 PDR runs have been 3.9 to 4.4 with different weather conditions and best of 3.9 no passenger and 4.4 with passenger.
Pure stock, no tune 30lbs tire pressure and about 65 to 72 degrees F.
I found this by playback on the video and stop framing as the tach increased through each gear. It happens a little too quick to eyeball it.
Speeds were 42 (1 to 2), 68 (2 to 3), and 94 (3 to 4). Sorry haven't had enough room to take it any higher.
My timed 0-60 PDR runs have been 3.9 to 4.4 with different weather conditions and best of 3.9 no passenger and 4.4 with passenger.
Melting Slicks
Joined: Nov 2014
Posts: 2,204
Likes: 17
From: Fayetteville North Carolina
St. Jude Donor '15
My 2015 A8 Base ZF1 tires with T/C off, in Competitive Driving mode in D as recorded on my PDR shifts consistently at 6200/6300 1 to 2, 6200/6300 2 to 3 and 6300/6400 3 to 4.
Pure stock, no tune 30lbs tire pressure and about 65 to 72 degrees F.
I found this by playback on the video and stop framing as the tach increased through each gear. It happens a little too quick to eyeball it.
Speeds were 42 (1 to 2), 68 (2 to 3), and 94 (3 to 4). Sorry haven't had enough room to take it any higher.
My timed 0-60 PDR runs have been 3.9 to 4.4 with different weather conditions and best of 3.9 no passenger and 4.4 with passenger.
Pure stock, no tune 30lbs tire pressure and about 65 to 72 degrees F.
I found this by playback on the video and stop framing as the tach increased through each gear. It happens a little too quick to eyeball it.
Speeds were 42 (1 to 2), 68 (2 to 3), and 94 (3 to 4). Sorry haven't had enough room to take it any higher.
My timed 0-60 PDR runs have been 3.9 to 4.4 with different weather conditions and best of 3.9 no passenger and 4.4 with passenger.
I would still like to see a back to back comparison of a tuned/non tuned car to see if the shift points increase.
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
Two things; one I agree, I'd like to see a "tuned vs non-tuned" and my car as I mentioned is a "base". The Z51 has a different gear ratio. I'd be curious to see how that runs out.
My 0-60 times were with and without launch control. For the most part I got slightly better times (only .01 to .03 different) with LC off and just rolling out a bit. I found rolling out with TC on was the slowest times and with TC off was consistent 4.0/4.1 and my best at 3.9.
All the runs were on good condition concrete. I assume you could get way better times on a prepped track (1/4 mile).
Melting Slicks
Joined: Nov 2014
Posts: 2,204
Likes: 17
From: Fayetteville North Carolina
St. Jude Donor '15
Good eye;Yep your pretty much on the button from what I've seen using stop framing.
Two things; one I agree, I'd like to see a "tuned vs non-tuned" and my car as I mentioned is a "base". The Z51 has a different gear ratio. I'd be curious to see how that runs out.
My 0-60 times were with and without launch control. For the most part I got slightly better times (only .01 to .03 different) with LC off and just rolling out a bit. I found rolling out with TC on was the slowest times and with TC off was consistent 4.0/4.1 and my best at 3.9.
All the runs were on good condition concrete. I assume you could get way better times on a prepped track (1/4 mile).
Two things; one I agree, I'd like to see a "tuned vs non-tuned" and my car as I mentioned is a "base". The Z51 has a different gear ratio. I'd be curious to see how that runs out.
My 0-60 times were with and without launch control. For the most part I got slightly better times (only .01 to .03 different) with LC off and just rolling out a bit. I found rolling out with TC on was the slowest times and with TC off was consistent 4.0/4.1 and my best at 3.9.
All the runs were on good condition concrete. I assume you could get way better times on a prepped track (1/4 mile).
Don't all the A8 cars have the same rear end gear? (aside from Z06)
Burning Brakes
Joined: Mar 2006
Posts: 1,102
Likes: 587
From: Seal Rock Oregon
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Nov 2014
Posts: 2,204
Likes: 17
From: Fayetteville North Carolina
St. Jude Donor '15
Melting Slicks
Joined: Dec 2014
Posts: 2,785
Likes: 2,324
From: Central UT
'15 Z51 A8. 1-2 and 2-3 right at 6500 on the two occasions I've checked while in D. I drive it a lot in M and have shifted myself right at 6500 8-10 times - wonder if that helped the learning curve in any way?
Thread Starter
Pro
Joined: Jan 2013
Posts: 567
Likes: 28
From: Arizona
Not 6500 that's for sure lol. Each gear is different, 1-2 and 2-3 are a little earlier, 3-4 and 4-5 are much closer to redline.
I've wondered since I got my car if this was a display issue, if the engine really is shifting at 6500 and the tach just doesn't respond quick enough to display it accurately, or if it's really being lazy.
I need to data log mine and find out for sure, for drag racing I would want it to shift right up against the limiter every time.
Has anyone with a tune noticed a change in shift RPM?
I've wondered since I got my car if this was a display issue, if the engine really is shifting at 6500 and the tach just doesn't respond quick enough to display it accurately, or if it's really being lazy.
I need to data log mine and find out for sure, for drag racing I would want it to shift right up against the limiter every time.
Has anyone with a tune noticed a change in shift RPM?
Rolled into the throttle from 70 mph in "D" and in touring mode. The A8 shifted exactly at 6500 rpm at 132 mph. I was at 5000 ft elevation.
Don't know what gear it started in or shifted to.
Last edited by marcouvo; Jun 4, 2015 at 05:30 AM.
Race Director
Joined: Jun 2005
Posts: 10,909
Likes: 2,701
From: Phila Suburbs 2023 C8 & 2013 650ix
Looks like mine was shifting at 6350 rpm on the track. The problem with manual paddle shifting is that if you're slightly late on your shift and hit the rev limiter the engine essentially shuts down for a couple seconds. Sort of ruins your run.