I was building a 2010 Cobalt SS for laughs, and under the dealer installed accessories list I read this description for the $650 Power Upgrade Kit:

"Power up your Cobalt SS with this Turbocharger Upgrade Kit. Kit increases performance to 290 HP and up to 340lb.-ft. of torque. Requires dealer installation and calibration. Premium fuel required."

Surely this is a misquote of upgraded power output?

Sorry if repost. Didn't find anything under search.

 

that is the gms1 kit

 

yes it is but the power numbers are wrong
should be 280/320

 

Strange that they jumped the HP by an extra 10 and the TQ by an extra 20.

At least be consistent with your overrating.

 

Maybe a misprint. Maybe a revised intake with the 2010's?

 

Thank you for your help in finding the error. It is being corrected. They posted the Solstice GXP Manual Trans power numbers by mistake. The correct Cobalt SS official numbers are 280 HP and 320 lb-ft of torque.

As a side note: These numbers are being blown away with the chassis dyno results I have seen posted.

 

Yeah!! What he^^^^ said.

 

It's going to be a good christmas.

 

So Bill.......what are the real numbers lol? 280 and 320 crank is very conservative.

 

Those are the only numbers that can be report because they meet SAE J1369 procedure for reporting poser and torque. Those numbers are crank numbers. I am impressed by the dyno results.

Bill

 

bill can you link to your thread where you have the dyno results?

 

lol weak.

 

Anyone find it odd that after the introduction of the new stipulations for reporting HP/TQ (modified after it was discovered some manufacturers...we all know who they are...were over-inflating their numbers) that on average, GM vehicles numbers from factory (measuered at the crank) are very consdervative? We've seen with the SC and TC (I'm not sure on the Camaro but now I'm going to go look) that a range of samples on chasis dynos come up with similar numbers which always exceed bhp by a relatively substantial margin?

Where's 1BADSS/SC, I'm wondering if it's the same for the CSRT-4 stock and staged; I think the domestics were impacted less than foreign by the stipluations but need another example .

 

the dyno numbers urban rogue was stating for a stock GMS1 were exceptional........
it looked that he averaged 303 whp and had that one spike @ 313....

and claimed to be running with no bolt ons..i think

if that is the case im in love with this GMS1

 

they should of made a G5 GXP

 

Would have sold even less than the SS. And after the Pontiac announcement would have sold nothin'.

 

Well you said it* ....lol. Thinking of one thing and typing another Bill?? hehe






Disclaimer
*I'm not in anyway calling Bill a poser , I'm refering to GM posing HP to be lower than they infact are .

 

Consistent? Yes these numbers are incorrect, theyre the numbers for the solstice/sky application. But how was there other rating "Overrated"??? If anything it was underrated.

I just got the GMS1 installed and I dynoed 277WHP (almost what they rated to the crank, I got to the wheels) and 302wtq(so about what they rated at the crank I put down to the wheels.) I dynoed on the same dyno I had gotten my baseline numbers on...I picked up somewhere around 72wtq and 42whp! Hardly "overrated"

EDIT: heres the graph

 

.9% trive train loss FTW

 

I was unaware at the time of posting that they were numbers for a different application. By saying they should be consistent I only meant that I thought they should've added an extra 20 to both, or 10 to both. Not 10 to one and 20 to the other (a consistent "overrating"). Although with the way torque increases on these cars post-tune it would make more sense after I took a second glance.

I'm well aware of the numbers the stage kit equipped cars are putting down on dynos (I can't wait to see what mine will do since I have a baseline dyno as well). According to the released numbers from GM, it should've been 280 and 320, not 290 and 340. So I'm only saying that is overrated when compared to the official claim. I'm not saying that it's actually overrated. I agree, underrated without a doubt.

Thank you for getting back so quickly and verifying it was an error!

 

Very efficient drivetrain

 

i still wonder if their will be any benefits of getting the gms1 tune with a hpt tune over it to run a 22psi max..

 

Damn! That is impressive. I've been waiting forever for someone to post dyno results on an otherwise stock TC! I've got the stage kit and you can really feel those gains.