GMS vs. Aftermarket
I put down 300 whp and 335 wtq with GMS1, K&N air filter, and catless down pipe. I have Dyno sheet and video if interested I also ran 13.4 1/4 mile @ 110 MPH with these same mods on street tires!
YouTube - 2009 Cobalt SS Dyno
299 335
299 335
Actually its 300 and 335 that's my car!
Now I am sure I will get some sh*t for saying this but, when it comes time to tune my car over the GMS1 my preference will be to aim at the max air load that the stock turbo is capable of at 6k and to limit torque throughout the rev range to that (hoping that Vince can do that). I like what I see on the dynos from ppl with GMS1 and mods. Peak HP is up near 5800-6000 and power curve is very nice. I will probably have BYT then clean it up a bit with their tune to mazimize what Vince is able to do. Ideally I would have a very linear power curve up to 6k and a very predictable response at any throttle position/RPM. The last thing I want is torque spike, wheelspin, understeer when powering out of the apex. I don't really have a huge desire to drag race as I am already planning a twin turbo LS pickup for that. Idk whether that is even possible or a good idea. I gotta get back with Vince about it and Nick as well. I will be doing this within the next week as soon as I get the DP and CP done. I am still considering an intercooler upgrade as well. I would like something more effecient with the same volume as the stocker. Keeps the drivability and adds power with a cooler charge/more timing.
JM2CW
JM2CW
See I was hoping I would start this thread and it would just be flooded with people who had dynos of near or over 300whp with GMS tune so I wouldn't even have to worry about aftermarket lol, so far no luck. I think if I could dyno anywhere over 290 I would be happy. I'm sure that's what everyone says until they hit 290 though, and then it's 330, then 370 haha.
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