2015 z06 throttle lag

[Klumsy]

Driving me crazy any tips?

[Higgs Boson]

Can you be more specific? What are the conditions when you experience lag? Sitting still and revving it up? Coasting in neutral and revving it up? Or in second gear at 45 MPH and nailing the throttle? Pulling away from a stop light? Punching it in high gear at 80 MPH?

[Klumsy]

reving in neutral feels sluggish and rolling in the street throttle wont open fully till 4500+

[lsp408]

stock?

[Klumsy]

afe intake and headers

[GHuggins]

You might want to post the tune. Sounds like you've got a combo of things going on. What all have you dialed in air fuel wise so far?

[Higgs Boson]

I have not seen how to correct a neutral rev throttle lag, they all do it, Z06 or regular C7.

[GHuggins]

Have you tried zeroing out the accel threshold table and maxing max torque? Didn't have any issues with the 15 Z06 I tuned with this. Of course I also modify the lower portions of the DD tables that most people stay away from. Again, no issues with this. Engine had ported heads, cam, cai and light port work to TB though? So maybe that was why it was allowed. I know if you increase the accel threshold table, it won't hardly free rev at all. Increases in steps... Then I don't know if anyone else is having vve issues or not, but I put mine back to stock after it created a city block that was only able to be seen after closing and reopening the tune. Was creating a "false" 2800ish rpm rev limiter. Working with Bill currently on this and a few other issues I've noticed with 2.25... May just be mine. Who knows?

[Sébast19X]

Have you tried zeroing out the accel threshold table and maxing max torque? Didn't have any issues with the 15 Z06 I tuned with this. Of course I also modify the lower portions of the DD tables that most people stay away from. Again, no issues with this. Engine had ported heads, cam, cai and light port work to TB though? So maybe that was why it was allowed. I know if you increase the accel threshold table, it won't hardly free rev at all. Increases in steps... Then I don't know if anyone else is having vve issues or not, but I put mine back to stock after it created a city block that was only able to be seen after closing and reopening the tune. Was creating a "false" 2800ish rpm rev limiter. Working with Bill currently on this and a few other issues I've noticed with 2.25... May just be mine. Who knows?

Did you ever experienced a reduce engine power at around 140 mp/h ???
And I lost the launch control feature ...

2015 C7 Z06 A8
2.38 upper
Innovator west lower
meth kit
AFE intake
14.5 psi boost

Best regards,

[GHuggins]

It was only doing around 125 in 4th on the dyno, so do not know if it would or not? Can't comment on launch control either as it was a help out someone else rush tune. All I know is that he hasn't had any complaints from the owner yet and that particular owner would notice if anything was off or not...

What dtc was setting with the reduced engine power?

[Sébast19X]

No DTC, just tell me in the DIC : Reduce engine power. Park the car, wait 30 sec and restart it all is fine....

[GHuggins]

The other tuner I was helping out said the owner was planning on having it at the half mile this next month. If there's an issue, I'm sure I'll see it there

And that was just with nearly maxing the max torque limit? Or was it the accel threshold table? I know the accel threshold really screws things up if you go the wrong way with it... Did you also increase all of the airmass and sparkmass tables? Just wondering if I'm going to be called over at the half mile to fix this thing now or not, but I'm also pretty sure the other tuner I was helping had ran it like this in higher gears on his dyno, so who knows

[Sébast19X]

What are you doing with the accel threshold ?
Put 0 for all value on that table ?

Best regards

[GHuggins]

That's what I did, but now I thought you were telling me that that was going to cause a REP?

[Sébast19X]

That's what I did, but now I thought you were telling me that that was going to cause a REP?

No I have let alone this table. All value are stock setting.
I think my driver demand map a ,b ,c was a bit low.
I have increased them in 100% row, by 25%.
Seems to get away that reduced power trouble.
I will update when testing correctly.

[GHuggins]

So if I got the DD tables high enough "they are high enough all right - Perhaps a touch too high" then I won't need to worry about the REP at 140mph?

Only reason I ask, is because I was thinking of the peak torque table as the older gens regular torque tables, in other words pretty much OK getting pretty close to max and then the accel tables from testing were just for cutting power while revving, again like older gens. Sooo, every things OK with this and I won't have to worry about REP?

[GHuggins]

What did you figure out Klumsy?

[Sébast19X]

GHuggins, I think you are right and you should not see that REP at 140 mp/h

BTW what is the torque unit, the value are expressed in the Driver demand MAP A, B, C, table ???

N.m ?
lb/ft ?

Best regards,

Sebastien

[Higgs Boson]

GHuggins, I think you are right and you should not see that REP at 140 mp/h

BTW what is the torque unit, the value are expressed in the Driver demand MAP A, B, C, table ???

N.m ?
lb/ft ?

Best regards,

Sebastien

either kilowatts or axle torque, depending on year and model....can't recall what the 15 Z06 is.

if the numbers are in the hundreds, it's kilowatts. if they are in the 1000s then it's axle torque.

[Sébast19X]

either kilowatts or axle torque, depending on year and model....can't recall what the 15 Z06 is.

if the numbers are in the hundreds, it's kilowatts. if they are in the 1000s then it's axle torque.

Good to hear, it's probably axle torque... I will post a screenshot as soon as I get my laptop.
Is ther a pid to log axle torque ?

Also,on a side note, I found that if both of powerhop are diseabled and TCS parameter bumped from 900N.m to 8192 in a C7 Z06 2015 A8, we lost the launch control feature... I don't have tested both parameters one at time to know which can cause this. I suspected the TCS parameter....
Thx

Sebastien