My dad is a GM exec and he got this emailed to him along with other info (which I can't disclose for security reasons). These are actuall numbers as tested by GM:

As many have noted however the power does tend to go up after install when the computer has a chance to adjust to changes. Not to mention those with upgraded pulley's etc. should notice more significant gains.




I have no info regarding what gear the pull was done, or any other info, thought I'd share the dyno sheet provided however.

 

Just to add the blue graph labeled dynorunex stands for exhaust and manifold dyno, the other is baseline stock, the other is stage 2

 

pretty nice jump in power

 

pretty sweet

 

Not bad. Those were done in 3rd Gear if you wanted to know. I am loving how the 7k redline gives you an extra 7mph before you have to shift!!

 

Wonder what noob decided to rate the graph by MPH instead of engine Speed. So you minus as well subtract around 5 from all those numbers. Other then that, they are some decent numbers.

 

How does that logic work?

And why does it matter if it is shown in mph or rpm, there is a corrrelation between the 2 with every gear, and we all know 3rd maxes around 100 stock. I am not sure if this test even maxed out 3rd cause i don't remember what speed the car used to top 3rd at....so really those numbers could be low, and not high as you are suggesting.

 

Dyno results scaled by MPH and RPM will read way different.

The best results will come by using a RPM scale and the gear closest to 1:1

MPH based Dyno numbers are as accurate as a Dyno ran 1/4 mile.


As for the numbers 233HP is pathetic for the Stage 2 others have allready beat that number with there own Stage 2 dyno results not to ment ion in fourth gear.

 

Besides the numbers I have to say awesome looking car!!! Those headlights are sick , I didn't even think it was a cobalt at first

 

True, I agree completely and I look at it this way. Their base was 193.66!! We all know that the ss/sc dyno's well over that stock. So Im looking at their gain of 40 HP to their baseline to their stage 2, and adding that to the around 215 that these cars actually make and a realistic logical HP should be around 255.

I'd say 255 is about where it's at given that assumption, do you guys agree?

 

I think that's a photoshop, haha

 

the cobalt dynos around 193 on a mustang dyno.

 

Actually, MPH is a linear function of RPM. It is nothing more than changing the labels on the x-axis.

I've had my car dynoed on a dynojet, and my tuner then chose what variables to show on what axis. My max HP was the same no matter what variables were chosen.

 

i too enjoy the photoshop of the car the headlights look like a saabs.

 

If I could find a dealer who has this in New Jersey, I would get it.

 

An exhaust and manifold upgrade give a 33 HP increase!?!?!?! Are these the GMPP extrude honed manifold and GMPP cat-back? I didn't think these would afford THAT MANY extra horses!?

Also, what is wrong with the power band on the stock run between 83 and 93 MPH?? I thought our HP curves should be flatter than that throughout the revs.

What do you guys/gals think?

 

Good!

 

The exhaust upgrades are 7 HP. Stage 2 is 33HP. At least that is the way it looks to me.

 

Im sorry but there is no way it only makes 223 wheel power.....I let my friend with a MODDED evo drive it and then did a quick roll with him.....and it pretty damn close, if he's beating me it's not by a whole lot. He's running a tubular manifold full turbo-back with 02housing, upper and lower intercooler pipes with an intake and a boost controller....I would go with that one guys assumption of around 250 wheel OR more. I hopefully can dyno mine soon to see what this thing is making.....but it feels DAMN FAST.

 

ummmm no way the exhaust manifold and an exhaust gained 31whp, those are ricer #'s

that would be about 40 crank hp especially when the manifold only flows 30cfm more

 

Looks like the opposite to me.

 

Wait, wait wait. Don't forget the EVO weight more than the SS. What I mean is that if both car you talk were pretty equal from a roll, the EVO had for sure more HP because it weights more.

 

i've always felt like that for the money gm is the way to go it might be a little pricey but if and when it breaks your gonna love the warranty.

 

i dynoed my car stock by mph and had the hieghest hp at 227 then, that same graph looked at in rpm i was at 220