i was looking into getting the GMS1 kit i work at a dealer and i can get it for about 500. but would i gain more power and torque and spend less money if i were to buy the 3 bar MAP sensors and an aftermarket tune??

 

Yes depending on how the price of a GOOD tune is

 

Flat out, yes....

 

i mean i just read somewhere that 1 3 bar sensor is like 17 dollars is that an accurate price? seem low to me i could be wrong i got the price from here Cobalt Stage Kits

 

also i am leaning toward a trifecta tune. are there different types of tunes for the LNF? the only mod i have now is a injen CAI and around the same time i plan to get the tune i also plan to have a hahn catback with an high flow of road DP so would i need a special tune? sorry for the dumb questions im new to this turbo stuff so bear with me guys thank you

 

Yes $17 is correct for the map sensor (you will need 2) but you will also need either tha pigtails to splice in place of the 2.5 bar connectors, or purchace the plug and play connectors (best option in my oppinion). Here is a list of what you will need:

3 Bar MAP Sensor 55206797 (x2)

O-RING 3 Bar Map Sensor 12626998 (x2)

Cobalt, Solstice, HHR Stage Kit Harness Adapter 19212670H

As far as custom tuning software goes, there are really only 2 options. Trifecta and HPTuners. Trifecta is tuned by literally one person (Vince) and ONLY Vince. The "dealers" quite literally only load the tune for you. HPTuners on the other hand is also full custom tuning software, but if tuned by a competant tuner, can make more hp in my personal opinion (although some may disagree). Either way you go, your custom tune will reflect your existing bolt-ons to maximize the cars potential and driveabilty. Your best bet is to get all of your bolt-ons installed before you get tuned, but you WILL need to be tuned for the 3bar map sensors basically imediately if you plan on going into boost at all.

 

Why do you need 2x MAP sensors?

 

do you have a price or p/n for the plug in play?

 

Because you are replacing both. One in lower charge pipe and one on intake manifold.

 

click the links I posted man. There are prices listed for the specific parts

^^this

You can't mix and match the map sensors with different pressure values.

 

[QUOTE=09CobaltSS1;6763390]click the links I posted man. There are prices listed for the specific parts

sorry i didnt realize the harness u posed was the plug and play. thanks very helpful

 

or u can just get trifecta tuned without the need of the new map sensors. im at 22 psi, 23 is all u wanna go with stock turbo anyway, and map sensors work fine. dont spend the money on new sensors cause u dont have to

 

What are the up's and down's of going with either GMs1 and just straight Trifecta besides the obvious warranty?

 

Sub'd for PN's. I was told if I stay under 22psi I wouldnt need the 3 bar maps. Im currently tuned and at 21.97psi. lol

 

Only reason I went stage 1 is because I wanted to have it as my baseline tune after I get the trifecta select-a-tune feature.

 

So you have your select-a-tune now? Do you have any other bolt ons or just the tune? Thanks ahead.

 

No not yet, I've got a turbo xs catless dp and exhaust laying in my bedroom waiting to go on and pretty soon I'm going to buy an intake, intercooler and charge pipes. Assuming all that doesn't make me a throw a CEL I will then probably just wait until next summer to get the trifecta tune because cash will be a little more readily available then.

 

Ok, makes sense... Plus, you'll get to enjoy your car at the GMS1 level first, then, when it feels slow again (as it inevitably does), the rest of the stuff goes on.

I might do just that... Still undecided if I want to drop $720 to get the GMS1 installed ($500 for the kit from CED with plug and play harness and $220 for installation) or just get a catless DP (angled bung), intake, catback, and a trifecta selectable tune with the regular MAP sensors (which according to the post a few posts back are not required up to 22 PSI) for roughly the same money (800-900)...

Choices, choices...

 

Indeed, first it'll be bolt-ons, then a tune, a little while later bigger turbo, and next thing you know a jet engine strapped to the roof

 

Can anyone confirm that Cobalt, Solstice, HHR Stage Kit Harness Adapter 19212670H is for both harnesses for $102.95. Or is it for each individual harness at $102.95? Sorry for the noob question.

 

The stock turbo is fine at 24psi. Beyond that is where things get questionable. The thing to keep in mind about boost levels in the 21-23psi range is you can EASILY spike 24-26psi and even quite a bit more if boost is ramped in too quicklly so by having the 3bar maps it allows the tuner to have the head room to view these spikes and avoid them from happening.... unless for some reason that's what they're trying accomplish

Yes the harness kit is for both the top and lower sensor.

 

i will be getting the plug/play when i upgrade my turbo since i will wanna be around 26psi.

 

just get pigtails and re pin your stock wires.... its not that hard to do..check out the performance autowerks website. you can get the sensors and pigtails if you decide to go with a custom tune for pretty cheap. it includes some wiring extensions(not plug and play but all you really need to do is de-pin your old connector and pin the new connector.

as far as the stock turbo after 24psi its flowing hot air... these guys running 28psi etc etc are just asking for problems and ive personally seen it more and more and more and more. usually spiking to 24 and falling back to 22 i find to be pretty solid.

 

trifecta tune is more powerful than gms1 and with trifecta select a tune u can turn tune on and off with traction control button or cruise control button.

 

i watch mine, it doesnt spike at all. the reason i wont get the 3 bar till warrenty is up is they wont work with stock tune, i put it back to stock for warrenty issues