Is this the dreaded "learn down" at work? So until I get the tune from Vince, no matter what bolt on I add, there will be no hp increase?

 

It is not so much a learn down as way the car can acheive consistant torque no matter what the conditions, but yes this is what is commonly refered to as the learn down.

 

So without a tune, bolt on will not increase power correct? Thanks for your insite

^^^please....I'm so close to finding the truth....

 

Aftermarket tunes "learn up" the ECM. Lol. That's how I've been explaining it anyway

 

aaaagggghhh....you're killin me Vince True or false...bolt on will not increase power without tune?

 

Bolt ons can increase power a little without a tune. The gains are mainly in the higher rpms for the most part though.

 

This is the best answer I can give:

*Certain* bolt ons *might* increase power without an aftermarket tune as long as it does so in a way that does not increase actual airflow. Airflow skewing *may* also allow for increased power without a tune by tricking the ECM.

 

Airflow going in and or going out? For example, cat back would help but not CAI?

 

Going in specifically - but keep in mind airflow increases on the exhaust side may increase airflow on the intake side

 

Yes, I see...now I know it's not my imagination that I haven't noticed any significant power increase with my catback, dp and intake add on...can't wait for the call back for my Trifecta tune...thanks Vince!

 

quick question here, i read through most of the forum but didn't see it answered. If I buy the cable and what not, is there a way to flash the gm tune back onto the ECU when I take it in for whatever? this way even if they do start pressing buttons like people are claiming, they won't know anything?

 

dam vince, you did it... ur the man! check ur email i send u one...

the "stage 2 trifecta tune" has the stock tune in the ECM, it all depends on where you want it to be... ex. CC on - stock tune,
CC off - modded tune

or

TC on - stock tune
TC off - modded tune

 

Pressing buttons doesnt affect whether the ECM reports itself as a stock tune or not.

But, that aside, all tune/cable combo orders include a copy of the stock tune in case you want to sell the car, or put the stock tune in for another reason.

According to the TSB I read the dealer uses the tech2 to verify the authenticity of the tune by comparing CVNs. Our new tune is undetectable per this procedure. Now, that doesn't mean they won't revise their procedure, etc. later and if the dealer sends it in for detailed analysis it will show up as a custom tune. So hide-a-tune is simply for addressing nosy dealers that want to give people a hard time about aftermarket tunes.

 

On V-8's and disels as of May 09 they send in a copy of the files to have GM PQC inspect the files, then they contact the dealer back, to let them know if warranty is going to procede or deny powertrain due to non-GM calibration values. THis is only for something major, ie...blown tranny, major engine parts messed up. I could see this moving eventually to cover the 4's and 6's.

 

i have heard that they send a copy of the ecm to have scanned to gm


I have also heard on the corvette forums that some of the vette ecm's are being locked by the dealers!

not sure how much truth there is to that however

 

Would that disable cruise control?

How would an "unused imput" work?

Sorry strong n00b.

 

Nope - it simply swaps the tune while you're driving if you turn the cruise control system on or off (the button with the light in it on the steering wheel)

Unused input means we take something like a sensor input that isn't used by the car and write code to trigger when that input state changes.

On the LS1 there were a couple extra inputs we used - if you ground the input, we can tell in the software running in the PCM and we could make dynamic tune changes based on this.

Many of the modern ECMs still have EGR provision but none of the delta cars use it (to my knowledge). There's a 0-5v input (for the EGR position sensor) and actually an EGR valve control output (which I used to control NOS solenoid on my old car). That input could be a simply switch or something as elaborate as a wideband O2 controller input

 

This sounds very tempting, and I'm really thinking of ordering but my questions are...

What happens when the stage 1 kit comes out? Let's say it comes out in 2 months (haha, wishful thinking I know) and I order this today, would I get a retune at that time if I get the stage 1 to take advantage of the new MAF, etc, or no? Would this retune cost me?

What about taking advantage of CAI, cat-back, etc. When flashing this tune in can you specify that you have a CAI and thus have the tune "personalized"?

Thanks much in advance for your time!

 

Our stuff can work on top of the GM stage tune - if a retune is required it would be subject to the standard retune fee.

All our tunes include datalogging and "dialing in" with whatever mods you have (CAI, cat-back, etc)

 

A seperate unused input sounds like a really cool way to go! Hide a button some where that turns on the nitrous but also changes the tune in the ecm to function as a window switch and wide open throttle switch.

Also, an aggressive launch control, no-lift shift, higher redline, etc. for an LSJ would be amazing!

This is probably the coolest advance in Cobalt modifications to date! Amazing!

 

That's exactly how my LS1 Camaro worked. Arming switch wired to the unused input, NOS solenoid wired to the EGR solenoid output. Code in the PCM to kick on the EGR solenoid when the arming switch is armed, throttle position is above 90% and RPM is above 3000 RPM. THEN it called in an alternate fuel and timing table so I could run a "dry shot" and bring in the extra fuel for nitrous via the PE table. Made 312HP/330TQ off the bottle and 405HP/460TQ on the bottle through an automatic.

There's just so much that's possible here. Lol

 

That's amazing!

 

Vince, I'm sold - on the fact you have a "automatic push button tune"...

two questions:

- is it possible to have a different tune for each button -
cruze control "on" - runnng 23/26 psi
comp mod "on" - running 28/30 psi
both buttons "off" - running stock tune w/20 psi

- is it possible to have the same setup you have for LS1 running NOS using the "buttons"
turning on NOS and/or METH inject at a set point during the powerband??

 

dude this switchable tune would be perfect for E85 if the injectors and fuel pump are able to account for the extra work involved in running E85... this would make tons more power for the turbo guys.

 

what are the details of the tune??
max psi?
launch control set at?
do you have the specs available yet?
thanks in advance.