GMS1 does not have a learn down locked in at 280HP and 320 Ft/LB of torque, but it does have "limitations" so you can't over spool the turbo or do anything that might cause damage to the engine. How else could they keep the factory warranty, than?

So here is my **OPINION**

GMPP would have kept the learn down in the canned tune if they weren't going to make it aftermarket friendly. You should still see gains from a DP and possibly an intake, but if you wanted to reach the full POTENTIAL of those aftermarket parts, you should have a tune deisgned specifically for YOUR car. You may still get a CEL with GMS1, so you have to aware of what you are putting on and how to possibly adjust for it.

You have got to pay, to play. If you start making these modifications, like a Downpipe, intake, intercooler, and most certainly a tune, INCLUDING GMS1, you have to be okay with the fact that your warranty might be void. The most annoying thing about this forum is when ppl complain that their warranty is void, and than you look at their sig and see all their mods.

If you want to keep your warranty, than don't mess with the car.

 

hook up the 200 shot nitrous and call it a day.

 

Psst 200 shot is for sissys. I will be going with a 1000 shot of nitrous. I wants to spin the tires in 5th

 

You might see a 5 to 10 HP increase with any aftermarket mods on a stock tune. The torque based controller will adjust airloads to its set amount no matter what mods you do. With an intake you can either gain OR lose HP/TQ based on which way the fuel trims get skewed.

 

There is no real thing as "learn down". The PCM uses airload, rpm and lambda to calculate efficiency and TQ/HP. All tunes, whether stock or GMPP or aftermarket, use these values to gain/restrict performance. If you do mods that increase the airload seen by the PCM, it will adjust the wastegate until the airload is back within the specified range. The wastegate also has a maximum setting that it will adjust to as well.

The GMPP stage 1 tune is set at a specific airload that will not allow over 320TQ. The stock tune is set to allow a specific airload that will not allow over 260TQ. This is the way it is. You can slightly influence those values with mods, but you will probably never see over a 5% difference (5% of 280HP/320TQ is 14HP/16TQ) no matter what you do.

 

Once again, BESIDES Vince testing this with a tech2, I have also had one scanned with a tech2. If you flash back to stock when you take the car in, they will NEVER be able to tell from scanning with a tech2 that you were ever tuned. One of my customers was running 30psi (he knew the risks) for almost a year and was racing 2-3 times a week easy and finally blew the motor. We flashed him back to stock and he took the car in. The dealership is installing the new motor as I write this. As long as you flash back to stock I wouldn't worry too much about warranty.

 

Think about it vahdyx, you've already paid for the warranty, why risk it with a tune? If you've only got a few months/miles left then the risk would be less(but worse if something went wrong). If it's going till 2013 that's a long time. GMS1 is the most practical in your situation.

And for the learn down feauture on GMS1 you guys are going back and fourth if it exists or not. A definite answer would be great if someone could find it.

 

No offense to you but that guy's motor should not get warrantied. If someone does that to a car and it blows up its not chevy's fault. If I blow mine doing what I do to it/with it then I'll pay for it. That is why warranties are all messed up these days and people have problems with getting simple stuff done. That is b.s.

By the way 72 novas= sweetness. my neighbor has a beastly one.

 

Werd. No wonder we have so many issues when we have real warranty claims.

 

It is definitely a gamble. That particular dealership either just doesnt care or doesn't have the gm warranty claims breathing down their neck. Plenty of cases of warranties being void for aftermarket parts completely irrelevant of the initial issue. It is more common practice now for dealerships to void warranty work for virtually ANY aftermarket component and even some cases, void it under suspicion of. That is a gamble I would not take. I tried to make a post about the various ways theyll attempt to detect tunes and void warranties, but it got dismissed. It doesnt have to be detectable on a tech2, if they so much as smell a tune, consider it void.

 

People call the torque airload calculations a "learn down". The GMPP stage 1 tune DOES have a set airload that the car is allowed to achieve, so in that sense it DOES have a "learn down" if that is what you want to call it. In fact ALL tunes will have a "learn down". You can make the Desired Air Load and Max Air Load some astronomical number that you could never reach (like 500 or something) but you will stress the turbo. There are a couple of other torque tables that you can make changes to that will change the calculations some, but the Desired and Max Air Load tables are the main ones that concern torque calculations.

 

So for the less intellegent, this means like you stated previously that with exhaust I should get about 5% Est. increase. So 14HP on a downpipe?

 

You could possibly see up to a 14HP gain.