Just drove past my local Chevy dealer and saw this sitting on the lot and wanted to snag a quick picture. I thought the stage 2 was about 240-250 hp but 275? Is there something I'm missing or is GM trying to pass it off and hopes nobody notices

 

Dealer lying. Stage 2 = MAYBE 245hp

Where in PA? What dealer?

 

You could take the usual 235 FWHP and change that to 275 Crank HP.

They should also paint 245 HP on all the stock SSs too because that's what their 215 FWHP is closer to.

 

Thats a lie for sure!

 

wouldnt it be right if its @ the crank? just asking .

 

Yeah they are talking crank horsepower. So technicaly they aren't lieing!
That is very missleading though.

 

GM always rates cars at the crank. they DO tend to be under rated, but it's always at the crank. the 205 HP rating is also, logically, at the crank. stage 2 is supposed to take you to 245 crank HP. assuming the GMPP exhaust does ten horses, lets say that'll be 255crank HP... still no where NEAR 275 as far as ratings go.

the logic is thus, even if it makes 275HP at the crank, the dealer has ZERO right to say so, since they are not the ones that do the offical ratings. at least on a new car. if it was used and there was a dyno sheet to back it up, then maybe.


this is just a dealer doing ricer math.

 

Well since most all cars come rated at the crank... they technically aren't....

 

First dealer I've seen that actually knows that the SS's are underrated. What they should do though, just to keep it simple so when someone asks how it has that power, just take GMs 205hp rating + 41hp (again GMs rating) for stage two and advertise 246hp, which isnt that far off of what it dynos at. 275 is about accurate though for at the crank power on a stage 2, they just cant prove it.

 

No stage 2 is not 245 crank horsepower. That's wheel horsepower. I have stage 2 and I put down 242whp. So that would be about 275 crank horsepower.

 

my point is, if the car is brand new, they have no cause to claim anything other than what GM says it should be.

 

Dealer ricer math:

Stage II Kit is good for 245HP
GMMP Intake 15 HP
GMMP Exhaust 15 HP
=

275 Horsepower!

 

Look at where GM pulls the 205 number from though...it's like 5600, almost 1000RPMS before redline. RPMs that the engine is still building power though. If they took the HP at the peak, then yeah, 275 crank hp would be about right.

 

The dealer is Lawrence Chevy in Mechanicsburg PA. The "salesman" said they added some 400 dollar radiator which isn't apart of the stage 2 package that boosted it up to 275

 

That salesman sure did see you coming.

 

I only put down 213 whp with my stage 2 and a 2.8" pulley (it was a dyno-jet, too). But I think that has more to do with the heat (105 F) and the dyno settings. Those mods plus header, cat-back, and a tune on the same dyno still only got me 236 whp, even the guy tuning offered me a discount because he felt he should of gotten alot more out of my car than that.

 

Notice they put "full exhaust"? They probably have the GMPP manifold as well as the stage 2 kit plus the cat-back. They're probably figuring 275 flywheel horsepower, but they're still using "ricer math" to do so.

 

Last Saturday 3 of us local SS/SC's had our cars dyno'd during a locally run Dyno Day. Here are the mods and results...

'05 SS/SC (Mine): 261WHP
Mods: GM Stage 2, K&N CAI, NGK BKR7Es

'06 SS/SC: 226WHP
Mods: Injen CAI

'06 SS/SC: 262WHP
Mods: GM Stage 2, Injen CAI, GMPP Sport Cat-back

These were all done within a couple hours of each other. Another thing to note, I dyno'd my car when it was stock (15,000kms on odometer) and it put down 214WHP.

Sooo, 275hp I would say is just a little high for WHP and a little low for BHP. But it's not too far off. Could that header add a little more than 10whp?

 

hey bro, i found a site out of these forms the guy had a lind to a place that sold stage 5 upgrade and the people who sold it said that the stage 5 took u to 275hp ill hook it up when i find it again

 

They should dyno it and stick the sheet next to the invoice.

 

got the site and its one we all love http://www.intense-racing.com go the the store/lsj/performance package ull find it there along with stage 1-5

 

i don't care if it's a 500hp car. it's not cool to say it has more power than GM says. i'm sure it's against some sort of rule... i'm not debating that the car makes that power or doesn't... in fact as i recall GM has stated that the exhaust and intake are purely cosmetic and make no promises of power gain.