Are there any computer tune upgrades to increase HP and Torque in the C7 stock motors (stingray and grand sport) that would not require any hardware changes? If this were possible would it affect a warranty?

 

If you tune your warranty is gone. No matter what the internet tells you. Now will certain dealers not care? Yes, will others refuse to change your oil, yes.....
Any tuner can help a stock car with no mods. Fuel/air maps, TQ management, timing, etc.

 

Didn't one of our forum members verify that there is a file they are looking at when they do have a warranty issue and that file isn't altered by the Diablo?

 

Yep , it's called the CVN file and yes a Diablo does not alter the CVN file in any way ....

Dave

 

I have a DiabloSport Intune i3 93 octane tune calibrated for a cold air intake and disabling AFM cylinder deactivation and I passed my State of Ohio EPA E-check which plugs into the OBD port. The Intune i3 also lets me mod throttle sensitivity and transmission shift crispness on my 2015 Corvette Stingray.

Apparently the Intune i3 doesn't throw flags for a government e-check.

 

Ohio is a state that does not check the CVN file to see if the ECM files match what was flashed at the factory or a dealer, they do the same as my state GA , they just check to make sure all emissions sensors have reported and that you don't have any emissions related check engine cels , Diablo does set the AFM to "Not Report"
Dave

 

So who checks CVN files? And according to you, if you use the Diablo it doesn't matter if they do or not since it won't change. IOW, anywhere in the country, even if they do check, nobody will know unless the car is running obviously rough and has a loped idle, right?

 

1- States like Calif check the CVN file , there are other states that are starting to check the CVN for alterations .
GM requires the CVN to be checked on almost all engine related failures .. This was one of the first things done when my motor dropped a valve at 70 mph .... which ruined the motor and required a replacement
Also many states are now requiring a visual check so things like catless x pipe or headers will flunk

2- It does not matter if the engine is " loping" ... my Procharged LT1 does not lope .... but the tune was altered to accomodate boost and the extra fuel fuel that is needed

Any change made to the orginal ECM tune will show up as modified even if it was modified to just turn the fans on sooner
Starting in 2017 , GM even tried to encript the ECM and TCM but these were eventually "hacked"

While the Diablo will not show up , CRM, the software that is used to tune is very limited in what it can do when you compare it to HP Tuners software .....

 

NO. A year ago, a friend failed a Ca. smog check because of a tune. It was a project (time and $$) to return the car to stock, and then get it rechecked by a state certified referee. Parts--headers, non Ca. compliant cats, gas caps, cold air induction, etc.-- will also fail a every 2 yr smog check. Ca. will do anything to get your money.

 

How was the tune done? IF it doesn't alter the file they check for and it isn't obvious that you did the headers or whatever, will they know? IOW, if it is easy enough and I remove the headers every 2 years and switch the tune back to stock, will they know?

 

Tune it once with with anything other than a Diablo , it will be in the CVN file and not match whats in GM's data base for that serial number . The only way to get the ECM to pass is to wipe the OS from the ECM and start from scratch downloading , the OS , all the current car information , firmware and stock tune files from the AC Delco web site . This is over and above fixing any physical mods

Yes they will know , no you can't just put it back to stock ....
Glad I dont live on a state that checks the CVN but .... if i did I have all my stock peices i tool off and i have the means to fix my ECM
Dave

 

Same with my Charger. The Charger threw a code on a dealer scanner. And that ECM was locked as well. Had to buy an unlocked ECU, then tune it.

 

So, what's the point?
If you wanted more hp, you should have bought a z06.
For me, I don't think it's worth the hassle, $$$, possible problems, etc., for the little hp gain with a tune.
To each his own. Yes, these cars can be improved on, but, largely, they are great cars.

 

You are entitled to your opinion but I hate when people make this statement , " you should have bought a ZO6 " .... not everybody has 30 grand more ,for what is in most cases, just a toy . For some of us , stock is just not good enought . Put some headers and a tune on a LT1 and you have a solid mid 11 second street car

Kick it up a notch and you have a monster ....
Granted I was able to do almost 100 % of the work on my car but I found thru this forum a great set of coated headers, Mid Pipe and high flow cats for $700 bucks shipped , I found a ported Intake for $200 and for $4,800 all in and some help from the great members on this site , I was able to buy , install and tune a procharger , for others the cost might be much more but its still nowhere near the price difference of a ZO6 .

And all the BS about the LT1 not lasting .... well with an extremely conservative tune , I make more power than a Z06 and I have no worry about popping a ring land. I am not going for the land speed record like some do but it sure is really fast lol ...Would I like a wide body ... sure ... but do I love my base ... dam right , it best $5,700 dollars I have ever spent lol 😆

Dave

 

You being mechanically inclined and able to do the work yourself is a little different situation. I've found that the vast majority of c7 and c8 owners have a hard time changing their own cabin filters, etc., themselves.
I was kind of thinking of so many owners that have absolutely no knowledge of how cars work. A new owner comes here to the forum and reads that by bolting on a few parts, that they are going to be the terror of the town. They read about some manufacture's claims of vast horse power gains, and believe it, because, uh, yea, it's on the forum or the internet. At around $150-200/hr shop prices around me, 5-10-15hp gets real expensive real fast.
I know a guy that always lets us know that he has a "stage 4" upgrade. OK, what, where, who? Resale value?
I've never got a clear answer. I don't know if he even knows. He's not a exceptional driver by any means, and doesn't pull ahead of the group when we go on the twisty's in the mountains. I do assume, that in a drag race, he would beat a stocker.
So, yea, if you want to upgrade, fine, it's your car. But, be aware before you do.

 

Too heavy and cooling issues here in the hot TX heat. All can be solved with money but I like having N/A Had the same power and the new 416 will address the torque deficiency. So yes, I could have bought a Z06 but going fast N/A is fun

Dave has the supercharger use-case dialed in. Been a great running car for years

 

@96GS#007 Nothing beats a NA motor with a nice cam and heads ............ I went the fast and easy route with the Pro charger, which is ok for 1/4 mile and 1/8th mile racing, I have not had it on a road course yet, but we all know your NA is way better all-around thats for sure
Dave

 

But if they have the money to invest in the fun, it might be ok.

Agreed but so far, every forum has a few guys that think power is fast and easy to bolt on because of the ads. People don't like to read and are only good with a soundbite. They see "UP TO 50 HP" and they think it is worth 50 HP at the lease. Problem is nobody asks how that 50 HP was achieved. People seem too stupid to ask or even bother to interpret the data if it jumped up and slapped them in the face. They think a CAI kit is worth say 20HP. They don't bother to read the ad even if it tells them that it was achieved with this, that or the other. All they see is the 20HP. It's almost like the acronym WOSSOM. Win a race on Sunday, sell a car on Monday.

 

The T2 by ProtuningUSA works perfectly without any modifications whatsoever to my stock vette.
I am very particular about what touches this car and only decided to test it because a close friend vouched for them, turns out it was a simple but effective upgrade.

https://protuningusa.com/product/199...programmer-t2/

 

A 30% increase in HP and Torque thru the OBD Port lol lol

If you believe that you got those results, I have some ocean front beach property in Kansas that I will give you a great deal on .... 😂🤣😂🤣

Dave