My 2013 GS (new w/about 2k miles on it so far) seems to have plenty of power but I am a little disappointed in the throttle response. When I call for it, it seems to have a lot of hesitation and then it takes off like I would expect. Kind of like hitting the throttle, it has a hard lag, and then go time... My question is whether a tuner or other mod would eliminate the lag. I also have considered CAI/Headers/exhaust but thought I would start with the tuner question. Thanks.

This came up on some of the replies so here is what I can offer:
The car is an automatic with paddle shift. The experience of the lag is when driving in normal driving mode (not paddle) and I go to hit the gas to accelerate hard. The lag is something that seems to be noticeable. I am not talking about a stall effect but rather a short hesitation (half second to a second(, then downshift and away I go. If I am just accelerating under normal driving conditions it is not an issue, just under hard acceleration and only until the downshift occurs. For example, i may be running 40 mph and choose to go faster by mashing the gas. In that instance, the car falls on its face, then perks up and launches. Hope this helps describe what I am experiencing. By some of the replies this seems to be a known issue and I will research a little in the archives too. Thanks.

 

yes, a tune would help. Also look into the cow booster. It's specifically for the throttle response. He also does tunes in correlation with the booster, but if it's just throttle response then it's worth the $170 for the booster....

Do research on Chuck CoW (Corvettes of Westchester), and CoW Booster, and cow tune....

 

Yup ... what 'vig1116' said

 

Not sure how anyone can characterize 430+ HP as poor throttle response....but if I wuz you--of course, I'm not--I would take it back to the dealer and have it scoped to see if there are any issues that could be remedied under warranty before I went and threw an aftermarket tune on my car which may invalidate the warranty. I've got a '13 GS M6 and when I hit it in 1-2-3 with the throttle, it'll jump sideways without dropping the clutch, so if you're experiencing lag/bog, I'd have the dealer take a look first

 

Throw a Sprint booster on it. Easy and done and just plugs in. No need to tune it and lose your warranty just for throttle response.

 

Your throttle position is not exact to how far down you put your foot unless at full throttle. You may give it 50% but you are not opening the TB 50%. Horse power has NOTHING to do with throttle response.

 

Understood. My point was that I'm running a bone stock GS and don't experience any lag. Maybe it's the difference between an M6 and A6--OP didn't specify which he was running.

 

Have you really not heard about throttle lag in the C6 at all? Theres nothing to take to the dealer to look at, it's because of the non linear electronic throttle in the car. Since theres no cable, and it's electronic theres a curve in the throttle response where when you press the pedal 25% it doesn't respond with 25% of throttle, it's less. 50% pedal, significantly less throttle... If i'm not explaining it right OP, there's plenty of research on here to enlighten you.....

 

Here is basically how the CoW Booster works:
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As you can see by the graph below, a mechanical throttle control using a cable system gives a linear throttle response .. When the throttle pedal is pressed 1/4 th of the way to the floor, the actual throttle blade in the throttle body will be open 25%. Press the throttle pedal down 3/4th of it’s available travel, and the throttle blade will be open 75%.

However, do to the programming of the “Drive by Wire” throttle system in the LS3, LS7 and LS9 Corvette engines, the throttle is not at all linear. Especially just off idle and in the first 65% of it’s range.

In fact, looking at the chart below, you can see that when the throttle pedal is pushed down 30% of it’s total travel, the actual throttle blade will only be open 10%. At 50% pedal travel, the throttle blade is open 35% of it’s total range. This is what gives poor throttle response during normal driving.

The CoW Booster does an amazing job of restoring the throttle response in the area of the lower throttle angles by operating the throttle system in a linear fashion as would a mechanical cable operated throttle.

 

I was just about to ask if the OP was on auto or manual. I have no issues with throttle response on my 2013 GS. Mine is a manual. Maybe what the OP is feeling is the lag from when you slam on the gas to when the computer figures out which gear to put the car in.

 

You may very right there ..

 

Automatic

 

Thanks for the great info. I am familiar with TBW, as most of the modern FI bikes have gone to that system. Much as with an elliptical cam on the old throttle cable set-ups, my guess is that the reduction in throttle plate opening in the 5-50% part-throttle range is more for drivability at steady speed. Larger throttle plate inputs are gonna make for a jerkier ride over bumps and heaves at highway speeds. If you're tracking your Vette, definitely makes sense to go that way, but for everyday use, I think the driving response would suffer. IMHO.

 

Basically, I think you are right but the lag is a half second to a full second and in the meantime, the car falls flat on its face and the moment is gone if you know what I mean...

 

My bike is TBW and the response time is crisp, unlike this car... I get what you are explaining though and I thank you.

 

I assume it an A6. So have you tried turning off the traction control? Or is your concern at normal driving speeds and you expect it to downshift and it doesn't?

If you hit the pedal in neutral do you still have a lag in throttle response?

 

I would also guess that the TBW in your bike is programmed for ultimate throttle response, i.e., linear, for crisp acceleration as opposed to smooth cruising at steady speed. Apples and oranges...

 

Can you (or anyone) expand on this?

 

I have had both a LS2 and LS3 and I have had both engine's throttle bodies ported. It makes a world of difference. It is like the engine is directly connected to the gas pedal. A ported throttle body does not require a tune.

Check this forum vendor: http://www.fasterproms.net. Jeremy can help you out.

 

Bike is not a speed demon, but rather a 2010 Harley Davidson Ultra Classic. It is a big heavy bike but nonetheless the TBW is crisp and responsive. I have a 30 ft Sea Ray with a 496 Mag in it that has TBW as well and the experience is the same, it goes when I call upon it. The car, on the other hand, hesitates hard then picks up the pace...