V4 operation
Drifting
Joined: Feb 2017
Posts: 1,778
Likes: 902
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
I was telling you what I say to myself and call myself when I forget I am in manual mode. I also have been driving manuals for more years than I care to remember and maybe more than many. there is no comparison to driving a glorious manual versus driving a auto trans "especially paddles only" in manual mode. At least in my Camaro I can drive in manual mode with the shifter and not just the paddles. Thanks for sharing the manual mode info.
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Yes indeed , quiet otherwise. If the day is comfortable with the window open, I would not hear a creak anyway, but it seems quiet when the sun is gone on a hot day with the windows up a/c on.
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Me too, but well over 50yrs. I have drag raced at the strip and the street with C5 manuals, C6 manuals, C7 manuals.
Last edited by BJ67; Jul 11, 2021 at 08:36 AM.
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Glad you reminded me on the range Device, do you know for sure it works in the C8? If it does, that seems to be the way. Driving in Z mode with the trans set for track keeps it out of V4 mode but the trans stays in the lower gears even while cruising , you hardly even see 4th driving around down, that doesnt work for me, I need it to up shift.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
If you go into Z mode and set engine to track setting the engine will never go into V4 mode. Once you start up the car, you hit the Z mode button on the steering wheel and you are all set. It has become second nature to me now. As an added benefit Z mode allows you to customize so much more than just the engine so it has really allowed me to dial in the car to exactly how I want it and it is as easy as hitting the Z button after startup.
Last edited by BJ67; Jul 10, 2021 at 09:16 PM.
Drifting
Joined: Apr 2005
Posts: 1,757
Likes: 484
From: Portland Oregon
Just tried that today, how do you live with the very much delayed up shifts? if your cruising around town, it takes some MPH to get the car to up shift just to 4th and it will never up shift to 5th until you reach another MPH thresh hold. That doesnt work for me, any other methods or settings? other than the range device?
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Drifting
Joined: Jul 2016
Posts: 1,902
Likes: 1,164
From: Keswick, Virginia
That AFM seems to cause consternation and worry - probably for good reason. GM has had myriad issues with it in thei Silverado/Sierra V8 engines.........which are similar in design & architecture to the small-block V8 used in the Corvette. I am part of the "can't be a good idea" crowd too.
My 2017 Stingray has a manual transmission, so no V4 operation unless the car is in "Eco" mode. My girlfriend has a 2019 Stingray with the automatic, so it does go into V4 by default. Right after we bought her C7 brand new, I purchased a Range AFM bypass device, which plugs into the OBD-II port. It prevents the engine from going into V4 mode altogether.
To me, it is not worth saving 1 to 1.5 miles per gallon and end up risking long-term engine damage. Our Corvettes still get great fuel economy in V8 mode anyhow and we don't drive enough miles in them to worry about squeezing a few more miles per fill up. We have four-cylinder daily drivers for that purpose.
Best of luck to you C8 owners and maybe the Range AFM bypass device might work on your cars too. I suppose their web site could give you the proper information. The price was $179 just over two years ago & is worth it for peace of mind.
Save the wave!!
🇺🇸 🇺🇸
My 2017 Stingray has a manual transmission, so no V4 operation unless the car is in "Eco" mode. My girlfriend has a 2019 Stingray with the automatic, so it does go into V4 by default. Right after we bought her C7 brand new, I purchased a Range AFM bypass device, which plugs into the OBD-II port. It prevents the engine from going into V4 mode altogether.
To me, it is not worth saving 1 to 1.5 miles per gallon and end up risking long-term engine damage. Our Corvettes still get great fuel economy in V8 mode anyhow and we don't drive enough miles in them to worry about squeezing a few more miles per fill up. We have four-cylinder daily drivers for that purpose.
Best of luck to you C8 owners and maybe the Range AFM bypass device might work on your cars too. I suppose their web site could give you the proper information. The price was $179 just over two years ago & is worth it for peace of mind.
Save the wave!!
🇺🇸 🇺🇸
Last edited by JK 23112; Jul 11, 2021 at 08:35 AM.
Race Director
Joined: Mar 2003
Posts: 10,789
Likes: 894
From: Northern Illinois
Oldtimer
Glad you reminded me on the range Device, do you know for sure it works in the C8? If it does, that seems to be the way. Driving in Z mode with the trans set for track keeps it out of V4 mode but the trans stays in the lower gears even while cruising , you hardly even see 4th driving around down, that doesnt work for me, I need it to up shift.
Race Director
Joined: Mar 2003
Posts: 10,789
Likes: 894
From: Northern Illinois
Oldtimer
That AFM seems to cause consternation and worry - probably for good reason. GM has had myriad issues with it in thei Silverado/Sierra V8 engines.........which are similar in design & architecture to the small-block V8 used in the Corvette. I am part of the "can't be a good idea" crowd too.
My 2017 Stingray has a manual transmission, so no V4 operation unless the car is in "Eco" mode. My girlfriend has a 2019 Stingray with the automatic, so it does go into V4 by default. Right after we bought her C7 brand new, I purchased a Range AFM bypass device, which plugs into the OBD-II port. It prevents the engine from going into V4 mode altogether.
To me, it is not worth saving 1 to 1.5 miles per gallon and end up risking long-term engine damage. Our Corvettes still get great fuel economy in V8 mode anyhow and we don't drive enough miles in them to worry about squeezing a few more miles per fill up. We have four-cylinder daily drivers for that purpose.
Best of luck to you C8 owners and maybe the Range AFM bypass device might work on your cars too. I suppose their web site could give you the proper information. The price was $179 just over two years ago & is worth it for peace of mind.
Save the wave!!
🇺🇸 🇺🇸
My 2017 Stingray has a manual transmission, so no V4 operation unless the car is in "Eco" mode. My girlfriend has a 2019 Stingray with the automatic, so it does go into V4 by default. Right after we bought her C7 brand new, I purchased a Range AFM bypass device, which plugs into the OBD-II port. It prevents the engine from going into V4 mode altogether.
To me, it is not worth saving 1 to 1.5 miles per gallon and end up risking long-term engine damage. Our Corvettes still get great fuel economy in V8 mode anyhow and we don't drive enough miles in them to worry about squeezing a few more miles per fill up. We have four-cylinder daily drivers for that purpose.
Best of luck to you C8 owners and maybe the Range AFM bypass device might work on your cars too. I suppose their web site could give you the proper information. The price was $179 just over two years ago & is worth it for peace of mind.
Save the wave!!
🇺🇸 🇺🇸
Pro
Joined: Jul 2009
Posts: 501
Likes: 43
From: Haymarket VA
I have aftermarket exhaust - if you think v4 mode is not great in stock form, it is not bad. the sound with Aftermarket is really impacted. I have the AWE Touring exhaust system and when in v4 mode the sound makes a rude fart-ish sound. the stock exhaust masks this pretty well
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
I have aftermarket exhaust - if you think v4 mode is not great in stock form, it is not bad. the sound with Aftermarket is really impacted. I have the AWE Touring exhaust system and when in v4 mode the sound makes a rude fart-ish sound. the stock exhaust masks this pretty well
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,950
Likes: 12,362
From: NE South Carolina
Regarding the C8 V4 operation, is there anyway other than driving in M mode that will stop V4 mode from happening . I understand that whatever the tricks are, the car always defaults back on a restart. Going in and out of V4 mode I agree is virtually seamless, but I would rather not have it in operation.
while I am at it , what about roof creak when the car is hot on a hot sunny day? I am thinking of putting lube on the 3 latched areas.
while I am at it , what about roof creak when the car is hot on a hot sunny day? I am thinking of putting lube on the 3 latched areas.
Here are some details AND a great video by a forum member. I drive in Z MODE and MY MODE where it does go into V4 and will use 7th and 8th gear where Z Mode won't!
- The car will upshift at much higher rpm than when in TOURING, SPORT or MY MODE.
- It will seldom shift past 5th gear (or 6th if going >73 mph. Note 4th and 5th are OD ratios, like 6th, 7th and 8th) providing engine torque with modest throttle increases WITHOUT downshifting.
- It will not go into V4 mode.
- When braking, it will downshift at higher rpm and rev match makes it perfectly smooth in each gear.
- Note, if desired you can still use the shift paddles. So if it's in 4th or 5th and your just cruising, pull the upshift paddle and you can shift to 5th, 6th or 7th. If making an aggrieve turn you can downshift at whatever rpm you'd like as you brake before the turn. But you'll probably find when in Z MODE with Power set to TRACK it will downshift at high enough rpm with aggressive braking. Frankly in my rural area I drive my manual shift 2014 Z51 and My 2017 Grand Sport about the way Z MODE power set to track operates. I was never in V4 mode (albeit when driving in MY MODE the DCT makes the transition perfect) and never used 6th. Only used 7th when on the interstate, which was very seldom.
https://www.youtube.com/watch?v=RI9M...annel=jrock702
Last edited by JerryU; Jul 29, 2021 at 05:37 PM.
Thread Starter
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Drifting
Joined: May 2018
Posts: 1,478
Likes: 984
From: Houston Texas