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I don't think any of these solutions voids your warranty, unless there is a way to show they that part could do that.
Couldn't you just push down quicker on the throttle to do they same thing this throttle controller is doing? I'll have to research these more. Congrats and enjoy!
Lets say our throttle pedal travel is 3 inches ...the Vitesse thing makes the pedal "shorter" and MUCH less linear basically giving you 100% throttle in the first inch of travel.
I had one and returned it. Its kind of a gimmick and sort of a bandaid.... but i can see how some guys think its neet. Those guy's prolly dont track their cars either.
The throttle response of this car is atrocious, even in track mode. I'm used to cars with linear, and instantaneous, throttle response. Is there any way to adjust this or 're-learn' the throttle? Are there any throttle settings that can be made available to the driver? There is a noticeable delay sometimes between giving a throttle input and actually getting a response from the engine. And many times the throttle behavior of the car is inconsistent.
Heal-toe is difficult in this car because you never know what you're going to get upon blipping the throttle. It seems sometimes the car revs the way I want, and other times I will blip and nearly nothing happens so I have to smash the gas pedal again, mid corner, and finally the car decides to rev up, but at that point it's too late. Maybe it's just me, but I seem to be able to heal-toe other cars fairly effectively.
Yes, I know I can use the auto rev match. But I bought a sports car, I want to drive the thing myself.
I also did some reading and it looks like you can get a tuner to adjust some of the throttle settings. Can this change the delay I am experiencing? I'd prefer not to tune the car at all because I am happy with the performance, I just wish it would respond to throttle inputs consistently.
Any advice is appreciated.
Ported throttle body will help a lot ....please look in the "performance tech" area for good info.
Unless you have driven with the Vitesse you are missing the point of the product! It provides instant acceleration. The Stock set up has annoying pedal travel and lag. I suggest you try it! Made my Camaro SS and now Vette Grand Sport feel like what Chevy should have done from the factory! Yes I know does not add any HP. Pushing pedal harder does not provide a holy **** acceleration like Vitesse...
Unless you have driven with the Vitesse you are missing the point of the product! It provides instant acceleration. The Stock set up has annoying pedal travel and lag. I suggest you try it! Made my Camaro SS and now Vette Grand Sport feel like what Chevy should have done from the factory! Yes I know does not add any HP. Pushing pedal harder does not provide a holy **** acceleration like Vitesse...
But all that its doing is reducing the bandwidth of your pedal travel and making it less linear. Its takeing your throttle input and multiplying it by X ratio so that you are in effect pressing the pedal quicker and further down... right?
Two issues! One is the built-in GM lag or tip-in the other is the time it takes for the air to get through the throttle body.
Below is a pic of what the Vitesse does as well as the issue with speed of air movement.:
I drove my 2014 Z51 non MRC is Track. Had the maximum GM throttle response which from what I observed after getting my Grand Sport was about linier. Set at max, 8 or 9 I refer to as "Boy Racer." Yep quick but IMO too quick for good throttle control. Note at WOT they are all open fully.
The other issue is the inherent time lag to get air to flow through the throttle body after the butterflies are open fully. Several folks modify the throttle body to reduce that time. Check out the C7 Tech Setion there are threads on the subject.
But all that its doing is reducing the bandwidth of your pedal travel and making it less linear. Its takeing your throttle input and multiplying it by X ratio so that you are in effect pressing the pedal quicker and further down... right?
Exactly ...A ported TB behaves totally different, you know that and i know that but....some guys just don't want to hear it.
Butt dyno is very happy with 465 hp and instant pedal
I don’t doubt the ported TB is doing something different but I read that buyers of that product describe their improved outcome with less WOW than Vitesse owners do post install of each product. Anyway, could not be happier with softer more responsive pedal that feels like car has awoken!
Glad we have so many aftermarket products correcting Chevy’s acceleration challenge.
Since someone dug up this old thread, I will update with my impression from using both a Vitesse, and a Mamo ported throttle body.
In my 2016 Z51 7-speed, with the Vitesse installed, I had far too many instances where the car would go into limp mode after wide open throttle runs through first and second gear. I even bought a second Vitesse, thinking I had a defective unit, but I found I had the same issues with the second one. The throttle response with the Vitesse is great...as it should have been from the factory, but I can't live with the limp mode issue.
A year or so back I installed the Mamo ported throttle body. The Vitesse is still installed in my car, but I disconnected it well before installing the ported throttle body. I see no reason to reconnect it, as the ported throttle body has eliminated the off-idle lag that was present in the stock configuration. Additionally, with the ported throttle body, I have yet to have the car go into limp mode. The car simply responds to throttle inputs as it should have from the factory.
Last edited by UsernameProtected; May 27, 2019 at 12:22 AM.
Since someone dug up this old thread, I will update with my impression from using both a Vitesse, and a Mamo ported throttle body.
In my 2016 Z51 7-speed, with the Vitesse installed, I had far too many instances where the car would go into limp mode after wide open throttle runs through first and second gear. .
FWIW, when I first installed the Vitesse controller I installed the control unit behind the carpet above the gas pedal. "Vitesse" commented on that when I mentioned it in a post to another forum member. He suggested that was NOT good as it can overheat (others have checked the temp of the case and it does get warm.)
I used his suggestion and used a plastic tie around the wires to put it up under the dash connected to a wire bundle. Soon after one of the small connectors pulled lose from the controller and it went into limp mode. Fortunately it was when I had just pulled out of the garage. I used a plastic tie around the body and attached a heavy "O" Ring. I then used the "O" Ring an another plastic tie to attached it under the dash. Worked fine for a year.
My issue was the Throttle Response in my Grand Sport was slower then I was used to in my early 2014 Z51 none MRC that I drove in Track for all the other benefits since ride was not affected. I only used a 4 or 5 setting as that was about what I have in my 2014 in Track Mode. Had my MRC software updated and found the throttle response was fine when driving in Sport, which I do now (for the other benefits) and the ride is fine. Don't need the Vitesse so removed it.
Appreciate the input on the Throttle mod as a good one will decrease the transient time to get air flowing. It won't give the "Boy Racer' settings of more throttle at less pedal BUT I found that useless!
SIDEBAR
The Vitesse set at 8 or 9 remined me of my first car, a '41 Ford Opera Coupe I stuffed in an Olds engine. Olds and Caddy were the engines or choice "in the day!" That OHV 324 cid engine (big for the time) was higher than the flathead. The throttle linkage was attached to the firewall and pivoted. Had to extend the arm ~4/6 inches to clear the manifold. Worked fine BUT had very little pedal movement from idle to WOT, perhaps 1 1/2 inches. Recall it was "floored" with the pedal ~1 1/2 inches from the floor!
Was a little tricky to feather the throttle but got used to it! Back in the day also had skinny tires! With no posi could tight up the tire (only one spun) in 2nd until you lifted!
I don’t doubt the ported TB is doing something different but I read that buyers of that product describe their improved outcome with less WOW than Vitesse owners do post install of each product
Made another pic to show there are two different issues, GM's slow tip-in particularly when set at Weather or Touring Mode AND that air flow can only increase at a fixed speed even after the throttle body has opened fully.
The graph left (black lines only) is from a technical paper showing the transient air flow after the throttle is open fully. Has lots of math equations but the key is the flow lines. Air can only increase in speed at a certain velocity based on the reverse pressure wave coming from the vaccum in the manifold, and entrance/exit shape etc. [[i]My business involves "chocked flow" (you can google that as well) where air can only travel at the speed of sound though a square edge orifice. I equate that to why you see lightening before you hear thunder!]
The graphs on the right are from Katech showing the time it takes air to flow AFTER the throttle is fully open with the OEM throttle body and their "ported" throttle body. Although "ported" may not be the correct word, IMO, as it is not larger, it's the entrance and exit shape (google converging- diverging nozzles if interested) that help control flow rate.
Throttle Body Mod vs. Throttle Controller? Mechanical vs. Electronics? Hardware vs. Software? What is your choice?
We can demonstrate it is both. They address different components of the delay and complement each other.
Soler MTB: Addresses the mechanical issue. Linearize the real throttle valve curve, get a faster and predictable response right off idle, no stumble, manifold pressure recovers earlier, boost kicks earlier too.
Throttle Controller/Pedal Mapping: Addresses the electronic/software issue. Adjust the pedal to feel shorter/longer and follow the smooth curve of the Soler TB at a rate you are comfortable with.
Use them together and get the perfect throttle feel, it is not one or the other. We recommend adjusting/smoothing the airflow path first w/ one of our TB's, then if you still think it is necessary, add a TC to follow that path. Otherwise, the TC will amplify the mechanical issues.
I have the pedal commander and am loving it. I use sport mode in the city and sport plus on the highway. Laggy throttle completely eliminated. Car has gone into limp mode but I can reset codes via my obd2 tool via my iphone. I'll re-position my PC from behind the pedal behind the carpet to under the dash as JerryU indicated to prevent limp mode.
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