last year it was rated at 171..now its 173? its the same car isnt it?

 

car? Its the same engine! lol

Its possible there was a minor change OR they are rated under GMs new rating system, which is more accurate. The 2.2 for ex gains 3 hp but loses a few tq.

 

so like can i say my car has 173hp even though its an 06? just so i have a couple more hp for bragging rights.

 

not really, you are probably sitting at 150 @ the wheels which is what you would want to brag about.

3 HP means nothing, dont worry about it

 

sure! Anyone who doesn't own a Cobalt would never know

 

Whatever makes you feel better about yourself.

 

lol. but like there isnt any difference between the 06 and 07 correct? no different engine or parts or anything...just the different rating?

 

No one knows yet

 

2006 Cobalt SS 2.4L 4 Cylinder 2007 Cobalt SS 2.4L 4 Cylinder
Drive FWD FWD
Transmission 5 speed Manual OD 5 speed Manual OD
Compression Ratio 10.40:1 9.20:1
Horsepower 171 hp @6200rpm 173 hp @6200rpm
Torque 163@ 5000 163@ 4800
Bore 3.46 3.46
Stroke 3.85 3.85
Fuel Capacity 13.00 gallons 13.00 gallons
Fuel Type Unleaded Unleaded
Fuel Delivery SEFI SEFI
MPG City 25 25
MPG Highway 34 34

 

what does the lower compression do?

 

Makes it easier for forced induction.

 

I thought our gas tank held 12.2 gallons? I may be wrong though.

 

sorry but thats BS on the compression ratio---it is unchanged. If it went down over 1 full point, hp/tq would drop.

 

since fuel mileage and the like didn't change, i'm guessing that there are no major changes

 

avro206 your right about compression being unchanged. just shows how unreliable autobytel and some of those other websites are. A quick check with chevy website shows compression unchanged.

 

171 hp is wrong anyways. I took the car on a dyno run the day after I purchased it, and then another dyno run (2 different dynos) and they both gave me a reading of 159,2whp, bone stock... so that makes it around 180-183 hp to the crank.

GM has always underated their engines' hp.

 

what kind of dyno was it? dyno jet?

 

I WOULD KNOW YOU LYING BASTARD!


lol just kidding.

if it isn't just the rating system, it could be in the tune.

 

first one was a DynoJet, second one (a week later) was DynoMyte.