Why did GM do this?!
Thread Starter
Melting Slicks
Joined: May 2005
Posts: 2,866
Likes: 123
From: gresham oregon
Why did GM do this?!
I can’t believe GM would have not fixed the throttle lag before releasing the C7. It is annoying and think I need to change that!
not sure what is the best mod for that? I have read the forum about the Solar unit, but I’m still under warranty! It’s not a deal breaker but definitely has to be fixed if I can. Do other people just ignore it?? Maybe I’m to **** and my ODC KICKING IN. Your thoughts. Thank you
not sure what is the best mod for that? I have read the forum about the Solar unit, but I’m still under warranty! It’s not a deal breaker but definitely has to be fixed if I can. Do other people just ignore it?? Maybe I’m to **** and my ODC KICKING IN. Your thoughts. Thank you
Drifting
Joined: Sep 2019
Posts: 1,913
Likes: 1,957
From: Colo Spgs, CO
Soler TB and/or TC solves the problem and they're easily installed/removed in your garage. If you go with both a TB and TC, recommend contacting @Mike@SolerEngr to confirm if any special pricing applies.
Drifting
Joined: Jul 2013
Posts: 1,603
Likes: 798
From: Windsor CA
2024 C7 of the Year Finalist - Unmodified
Highly recommend the Soler TB porting, I found a new one for $80 on ebay and had him port it so I had my stock one in case I decided to switch back for warranty reasons, I also had them keep the exterior stock appearing with NO markings.
Melting Slicks
Joined: Dec 2007
Posts: 2,902
Likes: 668
From: North Fulton Georgia
I can’t believe GM would have not fixed the throttle lag before releasing the C7. It is annoying and think I need to change that!
not sure what is the best mod for that? I have read the forum about the Solar unit, but I’m still under warranty! It’s not a deal breaker but definitely has to be fixed if I can. Do other people just ignore it?? Maybe I’m to **** and my ODC KICKING IN. Your thoughts. Thank you
not sure what is the best mod for that? I have read the forum about the Solar unit, but I’m still under warranty! It’s not a deal breaker but definitely has to be fixed if I can. Do other people just ignore it?? Maybe I’m to **** and my ODC KICKING IN. Your thoughts. Thank you
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
I think I'll try and answer your question and it wasn't just the Vette but also the Gen6 Camaro and I've had both. I just say I didn't notice it as much as on my Vette. I believe they did it so it doesn't break the tires loose so quickly and lets the Torque Management have a chance to control wheel spin. Mine is corrected in HP Tuners and I actually have a video someplace when I was at the track last year where I hit the throttle but the car didn't move. We did it in slow motion on my buddies phone and you can see how it lags launching at the drag strip.
Last edited by 99vetteran; Jun 10, 2021 at 04:42 PM.
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
^^^^^^^^^^^THIS ^^^^^^^^^
Just think of how easy it is to break the backend loose now with the throttle lag ... imagine how many would be wrapping their cars around a pole if it was a true one to one relationship between the gas pedal and the throttle body . I choose not to modify in my tune , I use a vitesse throttle controler because I feel having the ability to adjust on the fly let's me launch my car harder at the track and be more consistent
Dave
Just think of how easy it is to break the backend loose now with the throttle lag ... imagine how many would be wrapping their cars around a pole if it was a true one to one relationship between the gas pedal and the throttle body . I choose not to modify in my tune , I use a vitesse throttle controler because I feel having the ability to adjust on the fly let's me launch my car harder at the track and be more consistent
Dave
Race Director
Joined: Mar 2001
Posts: 19,965
Likes: 6,769
From: Bonneville Salt Flats
There are LOTS of threads here related to this issue (do an "Advanced Search"). Indeed, even one(s) on how to properly adjust the pedal to deal with it. I, for one, can verify that they do NOT all have the problem (I've an '18 M7). After learning how the throttle can be installed/adjusted if need be, my experience makes sense; I simply lucked out at the plant. There are no shortage of "solutions," if it is an issue with your car. All the best. 
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Racer
Joined: Nov 2013
Posts: 347
Likes: 54
From: Helotes (NW of San Antonio) TX
Throttle lag & expectations......
Factory throttle lag seems to be an issue with most C& drivers. Most of us want instant engine response when we press the accelerator pedal, right? I too, was somewhat dissatisfied with the stock response on a 14 Z71 A6. Just my opinion, it was pathetic. I set out to improve things & following is what I did......
* Soler TB porting. Was an improvement, but still didn't satisfy what I was seeking.
* 2019 C7 Accelerator Pedal. Was surprised how much it improved the lag from dead stop acceleration! $60. well spent.
* Throttle Controller. Absolutely fixed the lag, but finding a setting with a happy medium took time. They work well to eliminate throttle lag, but don't add anything else.
Just my own experience...... I feel like it was a combination of things & modifications that made my throttle response acceptable for me. Others may not like how it feels. what you gotta do is weigh your options and find what meets your expectations.......
I'll say this..........my 14 Z71 throttle response was Awful! It took some patience & $$ but the results have been worth it.
* Soler TB porting. Was an improvement, but still didn't satisfy what I was seeking.
* 2019 C7 Accelerator Pedal. Was surprised how much it improved the lag from dead stop acceleration! $60. well spent.
* Throttle Controller. Absolutely fixed the lag, but finding a setting with a happy medium took time. They work well to eliminate throttle lag, but don't add anything else.
Just my own experience...... I feel like it was a combination of things & modifications that made my throttle response acceptable for me. Others may not like how it feels. what you gotta do is weigh your options and find what meets your expectations.......
I'll say this..........my 14 Z71 throttle response was Awful! It took some patience & $$ but the results have been worth it.
Drifting
Joined: Dec 2019
Posts: 1,814
Likes: 616
From: Blacksburg Va
My 19 w/ M7 has a lag that I notice trying to blip the gas to double clutch a down shift. It is also impossible to hold say a 900 rpm idle when I get tired of the engine shaking around at 600. I don't notice it otherwise but it is a **** poor excuse for a tune w/ a modern efi engine.
Moderator
Joined: May 2010
Posts: 15,266
Likes: 4,207
From: Northern Illinois
2023 Corvette of the Year Winner - Modified
2022 C7 of the Year Winner - Modified
St. Jude Donor '18 thru '25
My Soler TB made my C7 Z06 beautiful, very linear throttle no lag issues..
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,477
From: South Florida
There are multiple areas in the tune that a ported TB or a Throttle Controller will not fix. The ported TB is probably the best at fixing the off idle lag on tip in but nothing will fix the deficiencies in the tune except a tune. The throttle controller masks some of the lag but it cannot overcome the tip in lag because the ECU still limits torque and timing in this area no matter what external apparatus you use. Many people buy one or both and are happy about the change in pedal feel and post up how one or the other fixed all of their issues. The reality is they are in a honeymoon phase and the improvement was enough to make them happy and justify the money they spent. However, if the same people felt what it was like to add a ported TB AND a proper tune to address the throttle lag, they would sing hallelujah because they don't know what they didn't know.
TLDR? Ported TB and/or TB controller will only help reduce the issue but it will not solve it.
TLDR? Ported TB and/or TB controller will only help reduce the issue but it will not solve it.
Thread Starter
Melting Slicks
Joined: May 2005
Posts: 2,866
Likes: 123
From: gresham oregon
There are multiple areas in the tune that a ported TB or a Throttle Controller will not fix. The ported TB is probably the best at fixing the off idle lag on tip in but nothing will fix the deficiencies in the tune except a tune. The throttle controller masks some of the lag but it cannot overcome the tip in lag because the ECU still limits torque and timing in this area no matter what external apparatus you use. Many people buy one or both and are happy about the change in pedal feel and post up how one or the other fixed all of their issues. The reality is they are in a honeymoon phase and the improvement was enough to make them happy and justify the money they spent. However, if the same people felt what it was like to add a ported TB AND a proper tune to address the throttle lag, they would sing hallelujah because they don't know what they didn't know.
TLDR? Ported TB and/or TB controller will only help reduce the issue but it will not solve it.
TLDR? Ported TB and/or TB controller will only help reduce the issue but it will not solve it.
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,477
From: South Florida
Racer
Joined: Jun 2019
Posts: 386
Likes: 149
My biggest gripe with throttle lag is not on tip-in but rather on tip out (throttle hang). To me that is the most "boaty" feeling that the car has as a feature. I came off of my Evo X. That thing was direct 1:1 throttle and I loved it.
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,477
From: South Florida