C7 Z06 Discussion General Z06 Corvette Discussion, LT4 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track

Throttle response

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Old Oct 4, 2016 | 09:24 PM
  #21  
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Originally Posted by Kevin1106
Don't like it, don't by it.. MOVE ON.
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Old Oct 5, 2016 | 01:08 PM
  #22  
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To add some observations, comments and questions on this....

I have the same issue as the OP.

I recently traded in a 2007 Z06 for a 2016.
The 'lack luster in throttle response.' (to quote T/A KID) is the biggest disappointment I have with the new car.
At 2500 RPM in 2nd gear I can quickly punch the throttle to the floor and let go , and other than a brief change in exhaust note, pretty much nothing happens. ( this in track mode, with everything warm ... and I am over 500 miles ).
Doing the same in the 2007 Z06 would have resulted in (a) neck being snapped, (b) tires breaking loose.

Admittedly , getting neck snapped and tires breaking loose instantly is not necessarily a good thing, but, I got used to it, and liked it.
In more normal use, even at lower RPM , punching the go petal on the C6 resulted in IMMEDIATE response.
Now , with the new ride that simply does not happen.
Instead, on punching it, there is the immediate exhaust note change (initially almost sounds like it is 'bogging down' like one used to experience with a badly tuned carburetor)....
and then a few milliseconds later the power starts to build... This delay seems to be less than a tenth of a second.
and, after that delay, assuming the petal is left in go mode, the power very quickly does build to a level that feels superior to that in the C6 (and, yes, the tires then break loose ....

So, it is not lack of power, but, rather a delay of some milliseconds before it happens.

I certainly can live with it.... but, am wondering (a) why it happens and (b) can anything be done to improve the problem.

It is not clear if my new ride is in some way 'defective' or if this is normal.

Some others in this thread have implied it may be normal
(C7Z06Dude) My 2010 Z06 was very responsive compared to my new z06.
( T/A KID) Honestly in factory form there a little lack luster in throttle response....
(Higgs Boson) The difference is the power train management is now torque based rather than airflow based and it has very different characteristics.
(shftn7) You can tune out a lot of the "dead foot" in the car.Forced induction will always to seem have a lag from the factory.
> (ChrisN123) In terms of throttle response, its not really fair to compare a high-revving 6 cyl NA car like GT3. You're not going to get that kind of throttle response ANYWHERE else [ or high-revving 8 cyl NA car like c6 Z06 ? ]

If defective, what could cause that delay ? (I see no codes or anything to indicate a problem... and the car drives just fine)....
If normal, I guess it is just that I perceive that delay more than the average person.

If normal, is that delay a result of the computer 'nanny' programmed to keep me in check and perhaps improve fuel economy ?
If so, is there some 'tune' to fix this that would not invalidate the warranty ?
Or is problem simply a function of it being forced induction (the blower needing time to spool up ?) .

As a side note, My other car, a BMW X1 (x35i) has a very similar and even longer 'tip in delay' that is mostly attributed to a 'nanny' in the ECM computer rather than turbo lag ]


thanks for any advice on solutions.
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Old Oct 5, 2016 | 01:52 PM
  #23  
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If the Dealer didn't have junk gasoline in the car it was probably just the combination of the transmission being in break in mode and adaptive shift not yet learned and the normal torque management.
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Old Oct 5, 2016 | 02:06 PM
  #24  
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It has been tanked a couple times and I am fairly certain it always was with with premium (here in NJ, we dont tank ourselves).....
but, yes, I guess it could be a bad tank of gas.
I only notice the problem recently , since going over 500 miles and being more assertive with the go petal.... So, it could have been this way since day 1 , or not.

and, ugh, I forgot to mention its an M7.
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Old Oct 5, 2016 | 02:21 PM
  #25  
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Default Few possibilities:

1) The tires on this car are highly sensitive to temperature, if it is a colder night say 55-65 and the tires are cold traction control could have kicked in, in my Z, sometimes Ill floor it and it will cut off power for a split second then the car lunges forward , this car does have 650 lbs of torque that comes on instantly , the car is just doing its best to save your life

2) If the roads your on is uneven , has cracks or gravel, or your in the middle of any sort of bend, (no matter how small) traction control may kick in. I think during the first few milliseconds of WOT, the traction control computer is hyper sensitive towards the rear wheels moving at different speeds.

3) Vitesse Controller - best $179 you can spend for your Z. It makes the throttle much more sensitive, and helps with WOT too.

4) I replaced the the MPSS with toyo r888, believe it or not it improved my throttle response indirectly by having more instant traction the computers are less likely to engage the save your butt nannies .
the r888 are a MUST have for this car... They work so well cold and really work well if you like to get in and drive (I'm not talking about tracking) without worrying about tire temps.

You will love this car, but it does require a few extra mods IMHO.

Last edited by JonaOhana; Oct 5, 2016 at 02:25 PM.
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Old Oct 5, 2016 | 02:31 PM
  #26  
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Originally Posted by itsnotme
To add some observations, comments and questions on this....

I have the same issue as the OP.

I recently traded in a 2007 Z06 for a 2016.
The 'lack luster in throttle response.' (to quote T/A KID) is the biggest disappointment I have with the new car.
At 2500 RPM in 2nd gear I can quickly punch the throttle to the floor and let go , and other than a brief change in exhaust note, pretty much nothing happens. ( this in track mode, with everything warm ... and I am over 500 miles ).
Doing the same in the 2007 Z06 would have resulted in (a) neck being snapped, (b) tires breaking loose.

Admittedly , getting neck snapped and tires breaking loose instantly is not necessarily a good thing, but, I got used to it, and liked it.
In more normal use, even at lower RPM , punching the go petal on the C6 resulted in IMMEDIATE response.
Now , with the new ride that simply does not happen.
Instead, on punching it, there is the immediate exhaust note change (initially almost sounds like it is 'bogging down' like one used to experience with a badly tuned carburetor)....
and then a few milliseconds later the power starts to build... This delay seems to be less than a tenth of a second.
and, after that delay, assuming the petal is left in go mode, the power very quickly does build to a level that feels superior to that in the C6 (and, yes, the tires then break loose ....

So, it is not lack of power, but, rather a delay of some milliseconds before it happens.

I certainly can live with it.... but, am wondering (a) why it happens and (b) can anything be done to improve the problem.

It is not clear if my new ride is in some way 'defective' or if this is normal.

Some others in this thread have implied it may be normal
(C7Z06Dude) My 2010 Z06 was very responsive compared to my new z06.
( T/A KID) Honestly in factory form there a little lack luster in throttle response....
(Higgs Boson) The difference is the power train management is now torque based rather than airflow based and it has very different characteristics.
(shftn7) You can tune out a lot of the "dead foot" in the car.Forced induction will always to seem have a lag from the factory.
> (ChrisN123) In terms of throttle response, its not really fair to compare a high-revving 6 cyl NA car like GT3. You're not going to get that kind of throttle response ANYWHERE else [ or high-revving 8 cyl NA car like c6 Z06 ? ]

If defective, what could cause that delay ? (I see no codes or anything to indicate a problem... and the car drives just fine)....
If normal, I guess it is just that I perceive that delay more than the average person.

If normal, is that delay a result of the computer 'nanny' programmed to keep me in check and perhaps improve fuel economy ?
If so, is there some 'tune' to fix this that would not invalidate the warranty ?
Or is problem simply a function of it being forced induction (the blower needing time to spool up ?) .

As a side note, My other car, a BMW X1 (x35i) has a very similar and even longer 'tip in delay' that is mostly attributed to a 'nanny' in the ECM computer rather than turbo lag ]


thanks for any advice on solutions.
I'm right there with you. Some people can sense it and others can not. Also, the Vitesse does not fix it. Read my review in my sig. A ported throttle body helped it a bit...also read that review. I believe the only way to fully fix is with tuning.

Good luck!

Best,
Gene
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Old Oct 5, 2016 | 05:38 PM
  #27  
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Originally Posted by phantasms
I'm right there with you. Some people can sense it and others can not. Also, the Vitesse does not fix it. Read my review in my sig. A ported throttle body helped it a bit...also read that review. I believe the only way to fully fix is with tuning.

Good luck!

Best,
Gene
I agree. To me it was instantly obvious. Even my brother and brother-in-law who both drove the car as well said the exact same thing. I didn't mention it...they came back and said 'what's up with the throttle response.' I've been in 2 other C7Z's and they were the same...so it's likely 'normal.'

I can't imagine how someone could NOT notice it. I don't know what the fix is, perhaps a ported throttle body and a tune, but losing warranty over this is not worth it, however, it's EXTREMELY annoying sometime.
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Old Oct 5, 2016 | 05:49 PM
  #28  
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I agree that the nannys/programming are intrusive (probably a wise move). Prior to the LT4 the only positive displacement blower I had driven was this 406/6-71 Camaro. Throttle response is the first thing everybody who drives it talks about. I expected the Z06 to be even better in track mode. Nope.
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