Staged07SS

iTrader: (25)

Hey guys, finally put my 2013 GS on the rollers. She did very well with the GM Stage Kit, and my other simple mods (WERKS DP, Catless Mid-pipe, Forge Re-circ valve).

Final numbers were 260whp 316wtq.

Dyno'd in 3rd or 4th, which ever is closest to 1:1 (I forget).

A6, manual mode, Exxon 93 octane, GS mode, traction off, stability control off.

I used this same dyno for my Cobalt SS Supercharged back in the day, and it was found to be very accurate and consistent. Made the exact same power 2 years in a row.

Snail_SS

iTrader: (3)

Not bad man, how heavy are the cars?

ECaulk

iTrader: (6)

not to bad for a grandpa car

06blackbalt

iTrader: (3)

Nice

Staged07SS

iTrader: (25)

My car with the smaller 19" wheels weighs around 3710lbs.

hawkssoccer11

iTrader: (13)

some damn good solid numbers for that thing!! plus add roughly 20-25% for drive train loss with it being an auto!!!

63 Nova SS

iTrader: (3)

Nice numbers for an automatic! When do you go in for cataract surgery?

exninja

iTrader: (1)

ECaulk

iTrader: (6)

Henry3959

GM advertises it at 270HP

hawkssoccer11

iTrader: (13)

to the crank. plus the numbers will be low because of it being an automatic. add roughly 25% to his numbers and hes putting down numbers an lnf would.

07MetallicSC

iTrader: (16)

power and comfort. beautifully packaged car and cleanly modified. wouldnt expect anything less from ye sir.

jdbaugh1

iTrader: (1)

Who talks crank horsepower anymore? What matters is what you can get to the ground.

exninja

iTrader: (1)

Every manufacturer...agreed whp matters tho.

hawkssoccer11

iTrader: (13)

i agree!! but when guys see dyno numbers from an automatic they usually dont know that theres a significant loss when getting the correct reading because of the automatic transmission. hell some even say 30-35%. ive always been told 15-25% for an automatic car being dynoed.

jdbaugh1

iTrader: (1)

Manufactures only use that number because it is always bigger, just like TV's measure diagonally.

jdbaugh1

iTrader: (1)

Automatics should be getting more efficient as time goes on I would think. But those are probably just ballpark numbers anyway.


I will say crank horsepower a good way to explain deviation between two vehicles with the same engine setup with different drivetrains but that is about it.

Slowbalt2000

iTrader: (1)

even stock, these cars scoot pretty good

Staged07SS

iTrader: (25)

They sure do. I was surprised with how well it moved out when I first test drove it. Doesn't feel like a 3700lb car at all.

Yeah, the Aisin AF40 in the car is pretty efficient. I believe driveline loss was calculated closer to 15-18% with it.

For 2012-2013 Regal GS's:

270bhp 295tq stock

295bhp 335tq GM Stage Kit

Figure 15% driveline loss for the auto, and my car is making around 305bhp 370tq.

I know I know!! Just getting started

umrdyldo

iTrader: (1)

What kind of dyno numbers do people get stock? 210-215 whp?

At 20% loss this car is sitting at 325 at the crank, sounds about right.

jdbaugh1

iTrader: (1)

How does this torque curve compare to the typical LNF?

Staged07SS

iTrader: (25)

Stock the 270hp GS's (2012-2013) put down around 230whp 265wtq

From the few I looked at, they look pretty similar.