C6 Scan & Tune Onboard Diagnostics, Service Advice, Dyno Tuning, and Fuel Management for the Corvette
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Old Apr 26, 2025 | 05:12 PM
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Hi guys, wondering if it is worth putting a tune on a stock 2013 Grand Sport? If so, any good tuners in the Las Vegas area? TIA
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Old Apr 26, 2025 | 07:28 PM
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No.
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Old Apr 26, 2025 | 08:17 PM
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Thank you Sir.
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Old Apr 27, 2025 | 12:33 PM
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You could have a few things customized even tho it's not needed for performance. Trans shifting for example.
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Old Apr 28, 2025 | 04:48 AM
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If auto I would say yes. You might a little gain in HP. Also they might get rid of your throttle lag. So there is some good for it. The auto trans tune was well worth it
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Old Apr 28, 2025 | 03:08 PM
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I'd argue, yes, its worth it. We offer great tunes that you can get for an affordable price, and will absolutely improve the performance of your C6
Check out the DS-MFD PredatorX or inTune 3 8245.
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Old May 2, 2025 | 06:12 AM
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Originally Posted by Amctom
Hi guys, wondering if it is worth putting a tune on a stock 2013 Grand Sport? If so, any good tuners in the Las Vegas area? TIA
If staying stock, I would say no. Better to get a canned tune that is customized. I really like and have used DiabLew Tune in the past: DiabLew Tune

But if you want to get a dyno tune, the best first upgrade would be to add a set of headers. With a tune, you will see significant gains that you will feel.
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Old May 11, 2025 | 10:45 PM
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OP, as long as you never plan to sell/register the car in Calif, then go right ahead. Calif checks for "tampered factory tune parameters" via the OBDII. If found, they usually send you to a "referee station."

A tune is only as good as the tech doing it. As mentioned above, if you're an automatic, then get the trans tuned, too.

As far as LS7's go...Post tune, the car feels like it pulls just as hard, in 1-gear lower, after the tune.

In other words...

5th now feels like 4th did.

4th feels like 3rd did

3rd feels like 2nd did

2nd almost feels like 1st did

And 1st is practically useless, unless you "pedal" the car. Or, just use 1st to get the car moving.

This was for an LS7, NOT an LS3.

But, it's going to be similar, I reckon.

No appreciable loss in fuel mileage. Engine runs cooler, too.
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Old Oct 7, 2025 | 12:03 AM
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I have to say 100% yes. I got the COW tune on my 13 Grand Sport, completely changed throttle response and in general just much more peppy and much more fun to drive. I have the Automatic, he is sending me an EFI LIVE AUTOCAL which will be here this week. We will log data to get my car into perfect spec and of most important will be the transmission tune. According to him this will make shifts much faster, and firmer for paddle and foot input. There is a lot of controversy surrounding Chuck Cow on this forum and I seen a lot of it. For me, I decided to call Chuck myself and upon talking to him I can say he is very knowledgeable and likes what he does. He does tend to get busy and getting back can take a day or two but he WILL get back to you. I took a chance and for me I can say I am glad I did. That said, there are other tuners out there, if you can find one to tune your stock corvette and transmission if it is auto I would suggest doing it. If ur serious on the idea of a tune... remember these are not off the shelf products. Takes time and is a process, again I am glad I am doing it. Also look into Jim Mero for suspension tune if you have mag ride. https://jimmero.com/ Planning to have this as my next mod. Compared to stock format GM has these C6 dialed way back and its to bad. Good luck!

Last edited by TurtleRayZ51; Oct 13, 2025 at 08:03 PM.
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Old Oct 7, 2025 | 11:06 AM
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Originally Posted by NORTY
OP, as long as you never plan to sell/register the car in Calif, then go right ahead. Calif checks for "tampered factory tune parameters" via the OBDII. If found, they usually send you to a "referee station."
This is not entirely true. We sell 50 state legal tuners that can be used in Cali and will increase power and improve performance
Also, I've yet to hear of anyone ever being flagged for CVNs at a testing station.
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Old Oct 8, 2025 | 07:03 AM
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It is very worth while, if for no other reason than to get rid of throttle lag. The price of the tune is not that much more than a device such as the pedal commander.
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Old Oct 12, 2025 | 06:48 PM
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Originally Posted by Mike@DiabloSport
This is not entirely true. We sell 50 state legal tuners that can be used in Cali and will increase power and improve performance
Also, I've yet to hear of anyone ever being flagged for CVNs at a testing station.
If a device is inline, AFTER the OEM, then your golden.

I like the Predator 2 device, myself. (I also have a PowerCommander V...for racing purposes only.)

EDIT: I like the Diablo products.

Last edited by NORTY; Oct 12, 2025 at 07:03 PM.
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Old Oct 12, 2025 | 08:09 PM
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SMOG...CHECK!! If you live in California! Your screwed! They look at everything and anything that is missing or added! You won't Pass! I used to live in Calif. I live in Arizona Now. You do need to have a Catalytic Converter! But everything else is no problem!
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Old Oct 12, 2025 | 08:22 PM
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I am going to say, if you want your tune, you need to talk to Chuck Mosello about the CoW BOOSTER! There is a lot of controversy around Chuck on this forum—some good, some bad. Because of that, I decided to call him up, and I am glad I did. My car is a night-and-day difference now. It is friggin' kick-*** and nothing like what it was before. His tune is in two parts: engine and transmission, and they both work together. After I paid him, I received a PCM in the mail about a week later. Simply disconnect your negative terminal and install it. It took me about an hour. That alone was a big holy smokes moment.

Then, when I got this Autocal in the mail, which was this past Friday, we did the transmission tune for my A6, and OMG, I cannot say enough about it. I had a C7 Grand Sport auto, and my car now—this is a C6 Grand Sport with A6—ships better than that. In fact, it is so much better (faster, firmer, crisper), and it includes the use of paddles if you want to use them. When I am at full WOT, this thing will break traction. I have a bone-stock 2013 Grand Sport auto. The tune cost $1100, and I think it is 1000% worth it, man. Honestly, I almost feel bad for those who don’t have it. For the price you get engine tune, trans tune, 160 thermostat, shipping, and FREE use of a remote tuner to get into perfect spec.

I used to drive with traction control off all the time and hammer it—I never worried. Now, I won’t. I cannot say enough about it. If you are really looking for something special and are seriously considering options, then I suggest calling Chuck. I will say, he got the PCM to me in about a week. The Autocal took about three weeks, and I was getting eager, but other customers tend to take their time returning these devices or can’t data log because of bad weather, which holds the process up.

The day I got my Autocal, we loaded the transmission tune, and the next day I was able to log three sessions. He then sent me an adjusted tune, which was as crisp as my car was a little rich down low. I was supposed to record more today and send it back to him, but I got rained out, causing a delay.

He also has a link he can email to you, and when you’re on the phone with him, he can hop on your PC—so you can see him open the EFI Live software—and he will explain what he is doing if you want, or if you just need help. I am not computer-savvy, and I was able to learn how to record and send data, then download and upload his tune to my car.

If you call him, tell him Joseph Tito sent you. He’s a cool guy, very knowledgeable, and he enjoys doing this tuning—914-332-0049. I am active duty Navy here, and I plan to send him a few small swag items when I return the Autocal and my old PCM because I really appreciate what my car is now.

Good luck in your search!


Last edited by TurtleRayZ51; Oct 13, 2025 at 09:28 PM.
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Old Oct 12, 2025 | 08:32 PM
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Originally Posted by Amctom
Hi guys, wondering if it is worth putting a tune on a stock 2013 Grand Sport? If so, any good tuners in the Las Vegas area? TIA
Look shat my thread before you sell your self short good sir. I have the Grand Sport to.
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