I have a 2019 Z51 I am impressed with the praise of the Soler products. Question is which one to get the 91 mm throttle body, the controller, or both. Truth is I am leaning to getting both but think it maybe a overkill or may be a waste.

 

not overkill, both isnthe way to go. I've had the controller installed pretty much since I got the car back in March. I also have the 91 mm throttle body. But I have yet to put it on. That's only because I have a tendency to do more complex mods, and leave the easy 10 minute mods on the shelf. I'll probably install it when the car is just sitting in the garage in another month or 2. Maybe over the holidays.

 

Great question!

Throttle Body (TB): Real Airflow, Real Power
Our upgraded throttle body physically improves the airflow into your engine by altering the internal geometry. The result is a smoother, more predictable power curve and enhanced performance at every throttle position—from idle to wide open throttle (WOT). This upgrade:

• Delivers crisp throttle response
  
• Reduces lag and hesitation
  
• Improves daily driving feel
  

You’ll especially notice the gains during normal driving, low-speed acceleration, and quick bursts of throttle.

Throttle Controller (TC): Fine-Tuned Responsiveness
The throttle controller enhances throttle response electronically. It allows you to adjust how quickly the throttle blade reacts to your pedal input—eliminating sluggish feel and improving driving dynamics.

However, it doesn’t add airflow or horsepower. It still works within the physical limitations of the throttle body you have installed. So, if you’re running the OEM TB, you may still experience some minor hesitation under certain conditions.

The Power of Pairing Both
Individually, both upgrades offer solid performance improvements. But when used together, they complement each other perfectly—giving you real power and precision control.

In short, the OEM throttle body is only one part of the problem. Our TB + TC combo helps eliminate both the physical and electronic limitations, unlocking your vehicle’s full potential.

As always, your purchase is risk-free. Try either one—or both—and if you're not satisfied, return them within our policy window for a full refund (30 days).

For a little extra help, you can also use discount code tiff5off at checkout.

 

Mike, what size do you recommend for a stock 2017 GS?

 

The throttle hesitation on downshifts is terrible in these C7s(at least it is very noticeable in the M7s, can't speak for the slushboxes), the question is whether to get a throttle controller or just have it adjusted with a full on dyno tune/ecu flash!?

 

I would prefer to have the throttle adjusted via the ECM instead of a fooler to try to change the curve by fooling the ECM into giving you more throttle than it was programmed to. With a programmed solution, you can adjust it where you want it to be having better tip in and not to the point it causes wheel spin which does nothing? Also a programming solution can address other things like shift points in an automatic and maybe add a little power? Bigger throttle bodies are great things to have if your car can use the extra air. IF your pipe is an inch, whether you attach a 2 or 4 inch pipe won't make it flow any faster.

 

After tuning OBD1 for years I agree with changing throttle response in the ECM program, however now if you even change what temp the fans come on you change the checksum and you fail smog-really sucks. So this is the next best thing.

 

That is IF the state checks the file AND IF the file is altered. Which file? Also someone mentioned that the Diablo doesn't change the file? I believe it is the CVN file they are looking for that the Diablo leaves alone?

 

They check the CalID and CVN. Any changes in the ECU software (that actually runs the engine) changes the CVN. I've heard Diablo may have hacked a way to give the original data on a query, but don't know how well it works or if it works on later models. Gm has been staying on top of ways to detect any hack I'm sure so they can deny warranty claims lol. Calif. started checking OBD2 and I'm sure other states will follow them. Ca. started collecting data on OBD2 factory CalIDs and CVNs years ago and then we found out why.

 

I have your controller on the way. What setting is 1:1 input/output at all RPM, as in equivilant to a mechanical cable? Thank you!

 

Do you have a link for the CALLD since I can't find it? Thanks.

DCASOLE did verify that the CVN they check for DOES NOT change with Diablo. Not sure about CALLD.

 

https://www.bar.ca.gov/arsc/newslett...-modifications

 

Never head of a CLALLD......
I can assure you that it does not change the checksum of the CVN file.and that its undetectable .....

Dave

 

Now that makes sense ...... As long as the CVN is not modified there is not problem

 

Great question! I had mine on sport 5 , now lower. Sport 2 . I found it too jumpy on 5.