I'm looking at buying the GMS1 for my 09 Cobslt SS T/C. But I have a few questions from those who have it. I am running injen intake and pressure piping, MPx downpipe w/ cat and the MPx Cat-back exhaust. My question is, will I be running higher than 15psi? Just leave feedback on tune, good and bad. Thanks

 

Its a GM tune, It can use some improvment but its safe. As for boost. I believe you should be close to 20-22 PSI on a GM stage Kit.

 

A lot of people are very impressed with the GMS1 but if you want more power then you should probably go with trifecta or HPT

And yes you will be boosting more then 15, probably around 20-22psi like said above

 

You'll boost more. But with the LNF more boost doesn't alway mean more HP (yes the GMS1 increases HP & TQ, but in general...)

 

Thanks. I'm going to go with the GMS1 for now cause I bought the extended warranty with my car.

 

Well, you better not take it to the dealer with all those aftermarket parts on it, then. You'll have wasted your money on that extended warranty when they void it.

 

I've already spoken to the dealer and my tech that works on the Cobalt SS models said it's fine.

 

Where is this dealer? Sign me up

 

yeah no kidding. if i blow a piston i'll take it there lol

 

Me too. My dealer saw the modded stock snorkel on the stock airbox and said I modded the intake LOL. Stock airfilter was in as well. When I was having the O2 sensor issue they said my aftermarket high flow exhaust was outflowing the O2 sensor LMFAO.

Yes it will see 20-22 psi depending on load and RPM. Tune is very conservative and I am beginning to think GM put a lot of extra turbo overspeed protection in the OS because my car does not seem as fast as it used to be before I changed to the stage 1 sensors and OS (I have a custom tune on top of the stage 1 tune). I dunno maybe it is my imagination or the 96* ultra humid weather down here.

 

I go to Len Stoler Chevy/Cady in Westminster MD. But I just found a tuner so **** I spent my money on that warranty for nothing. O well Im getting the ******* tune I want.

 

It's alright. They would have screwed you out of it somehow, anyway.