So I guess my original message didn't get what I wanted out of it, so I will rephrase the questions.

What I was wondering is;

What's the learndown for GMS1 set to? I plan on getting GMS1 for the duration of my warranty. If I wanted to add some extra performance parts, will I see any gains with a catted downpipe and possibly an exhaust. I understand about the intake, I've read a lot of threads about it. Most people recommended only modding the exhaust side. So will the Learn Down of GMS1 just make those exhaust parts useless?

After I roll around with the GMS1 and exhaust mods for a bit, I was gonna get a Intake and Trifecta Select-a-tune so my fuel trims wouldn't be messed up. This sparked another question; If the Trifecta tune isn't selected (meaning I push the traction button or cruise button) and it goes back to GMS1 is my fuel trims gonna be messed up with the intake even though I've been tuned by Trifecta or does Trifecta somehow alter the GMS1 to be okay with the Intake?

I hope that clearifies the questions


Original Post

 

noob, you need to look at the million of threads created about intakes throwing fuel trims off with GMS1. the GMS1 was created with stock parts only! there are many of threads already created about this subject. obviously, you never looked at any or used the search thread tool.

 

If you're going to get a Trifecta tune, don't buy the GMS1. You newbs need to stop wasting money.

 

I'm wondering the fuel trim thing as well. I bought a ZZP intake tube and I'm wondering if GMS1 will be as wacky as most cars' trims. I'm guessing it will be off.

You will be fine with DP and exhaust without tune.

Oh and newbs, ask the guys with blown MAP sensors how that higher boost is going for them. GMS1 sensors are a nice addition to modding an SS/TC

 

I don't have a problem with any of my mods...

 

Would you like me to find every thread complaining about the GMS1 sensors? There's about 1000 of them. I've seen far less threads made about blown stock MAP sensors.

 

All the threads are about poor installation.

 

Poor installation and poor fit. Those GMS1 sensors were not designed for our cars. The angle of the connector is just all kinds of wrong.

 

1. The torque controller is set to 320 TQ/280HP for GM stage 1, at the crank. A DP and exhaust may net you a few TQ and HP, but not much.

2. If you get an intake your fuel trims will more than likely be way the F off. I wouldn't put the new intake on until you are getting tuned.

3. Like SSlobalt said, if you are getting an aftermarket tune why are you going GM stage 1? You can just buy the 3bar MAPs and have a tuned stage flash done.

 

^^This. I don't think I have seen any threads about "blown" MAP sensors.....Not saying they don't exist, but there sure as hell isn't a lot of them.

OP. Don't even bother with the GMS1. It's a waste of money. Just get the Trifecta tune and be done with it.

 

IF people would folow the directions and install the 3 bar MAP like they are supposed to, they wouldn't have so many problems.

 

There were a few that had issues with a bad batch of MAP sensors, but some of them were just oily sensors, too. We figured that out later.

 

Holy hell guys, let me clearify...

First off I apologize for the original post being vague, I was using my cell phone and thought it was clear enough, but I guess not.

I'm gonna edit the original post as well.

What I was wondering is, What's the learndown for GMS1 set to? Will I see any gains with a catted downpipe and possibly an exhaust.

After I roll around with the GMS1 and exhaust for a bit, I was gonna get a Intake and Trifecta Select-a-tune so my fuel trims wouldn't be messed up. My question then became, if the Trifecta tune isn't selected and it goes back to GMS1 is my fuel trims gonna be messed up even though I've been tuned by Trifecta or does Trifecta somehow alter the GMS1 to be okay with the Intake?

 

What we're trying to say is that you need to just start with a Trifecta tune and not waste your money on the GMS1 tune. If you go with a Trifecta tune after already purchasing the GMS1, the Trifecta tune will be written over the GMS1 tune. The only thing you will have spent all that money on is the GMS1 3 bar TMAP sensors. A Trifecta tune is like $320 or so and the GMS1 is a total of $700 or so, with install. If you get the GMS1 tune first, you will have wasted that $700.

 

From what I've seen on this forum, GMS1 is nice if you want to keep your warranty. It removes the learn down feature. Changing the intake will fark up the fuel trim. I don't really see how or why you would keep the GMS1 tune if you get an after market tune unless the tuner can modify the GMS1 fuel trims with your new intake. Not sure if this really helped :/

Some people (like me), prefer to keep the warranty for a while and have a little more power and torque.

 

So sslobalt just buy the Three bar t map sensors and then do the trifecta tune, yes?

 

There are many people that blew there stock sensors because of running too high of boost.

Also, according to the GM engineer, there is no learn down so no the stage 1 is not set to 280HP and 320tq.

This is probably your best option. No need to pay GM for the installation and tune.

 

You don't need the 3 bar sensors. Plenty of users have been fine for years on the stock MAP sensors. Obviously, opinions vary.

 

Agreed, but he was saying that he was just going to follow up the GMS1 tune with a Trifecta tune. There's no timeline, so I just assumed he wasn't going to have the GMS1 tune for long.

 

This is true, my original post was vague. I rewrote the question it has a timeline and should be more specific

 

Honestly dude if I were you, which obviously I'm not, get a drop in K&N filter, DP and a trifecta tune. I've been running 22psi for like 3 months and 6,000 miles, I haven't blown a MAP sensor yet. The GMS1 is a canned tune. A tune specifically for your car is way better. I wouldn't trust a canned tune to run over 20 psi. I just like the fact that I spent 300 bux and got like 40 hp added to the wheels.

 

Your timeline says, "a bit." How long are we talking about here? If it's until your warranty is up, I'd say go ahead and get the GMS1. Otherwise, just skip the GMS1 and go straight to Trifecta, or BYT, or Terminator2, or whomever you choose.

 

Now that that is settled...

GMS1 no learn down, I'll be fine with DP and Exhaust although gains will be minimal.

After warranty, Winter 2013 and I get the select-a-tune and an intake my fuel trims will not be skewed if the Trifecta tune isn't selected. So I can have Trifecta turned off and be okay.

is this correct

 

Don't bother with the GMS1. Just save your money.

 

You can't "turn off" the Trifecta tune. The Trifecta tune will be written over the GMS1 tune and all your bolt-ons will be tuned for by Vince. You will get datalogged by your tune-installer and Vince will adjust the tune accordingly. Once Vince is satisfied with the tune, you will be done and the Trifecta tune will always be "on." You will be able to switch between whichever two boost levels you choose. Honestly, though, 2013 is a long way away. You probably won't even still have the car at that point, if you're like most Americans.