10 GT3

There was a Chevelle club dyno day today I saw on a board so I decided to run the GT3. Just hit 3000 miles on the odometer today. Did just 2 runs (deal was 2 runs $30). No cooldown or special prep when we ran it. Car is 100% stock. Water temp was 175 and oil temp at 200 at the start of runs. We ran lid open with no external fans blowing on either end of the car. Both runs were in 5th gear. It was dead on with what I was expecting.

SticknClutch

I love those 50FT/Lbs you get when the cam profiles shift at 4.5K RPM.

DrDrilZ

so with all numbers corrected, how much hp at the crank?

Clifton

Is it the cams or is it another stage on the intake plenum?

GT3

10 GT3, why not corrected? Uncorrected numbers mean nothing. Have them send you the file SAE corrected. Next time, try to do it with the deckled closed, since exhaust hot gasses may get into the air intake as the dyno run is being done.

As a reference, here are my same day before/after results:
2010 GT3 (stock) and w/ Akrapovic race exhaust (Stock ECU and stock filter)


Savyboy's 2010 GT3 RS (Stock):


2 different dynos in 2 different states, but gives a better idea of SAE corrected numbers...

10 GT3

As SAE:

996FLT6

This is my dyno(corrected) with mce at thill few weekends ago on my 6. Sorry for the lame pic. Mike

GT3

10 GT3, your SAE dyno seems to be right on point as to where your car should be stock, but why does the uncorrected dyno in the first post (same runs I assume), show less power? Uncorrected is usually on par with STD, which reads 2.6%-2.8% higher than SAE...

10 GT3

Because the correction factor for SAE gets multiplied times the uncorrected number. If the pressure is lower than 29.23 and the temperature is greater than 77 degrees per the SAE standard, then your correction factor will be greater than 1. By comparison STD corrects to 29.92 pressure and 60 degrees. If you are seeing a correction factor less than 1, then you must be dynoing when it is cooler. When I prevously dynoed my 996 in 90+ degree temps, I was getting 1.04-1.05 correction factors at SAE.

GT3

Odd..... my dyno, which states all factors in the bottom, 82.60 F degrees, 30.29 in-Hg, 29% SAE: 0.97 :

10 GT3

Look at how dense your air pressure was when you dynoed. Greater pressure = lower correction factor. BTW, the spikes on your dyno at high rpms are due to the smoothing level. We would see similar spikes when the smoothing was set above 3.

NJ-GT

These 2010 GT3 motors show a nice powerband from 6,600 rpm to 8,400 rpm, pretty much over 90% of the power is in that range.

400+ rwhp is impressive for a 3.8 engine. The F430 puts just 25Hp more than that at the wheels, and it has a 4.3 with a 8500rpm redline from a V8 rated at 483Hp. The F430 also carries a lot more weight, so the GT3 should out accelerate the F430 everywhere, especially on the mid range where the 2010 GT3 shows more torque. Nice.

It is good to see dynos from a pair of bone stock 2010 GT3 and a 2010 GT3 RS. The 3.88 R&P gear from the RS definitely keeps the car on the sweet spot once the car is at speeds over 80mph.

fer2367

So this means that a stock 2010 GT3 is probably producing more than 435HP ?

rijowysock

at the crank has gotta be well over the declared 435hp to put 400 at the wheels.

GT3

Thank for the info. I'll posting a dyno in a couple of days, now that the software and filter were installed.