Camaro SS 2010 on dyno makes 364 whp & 371 rwtq !! Vid inside

[Jamestwilliams]

Originally Posted by Can-Am

Much worse than I was expecting, considering the stock LS3 corvette dynos around 380-390 whp, albeit on other dynos. On the other hand, Livernois got 350 rwhp from a G8GXP, so maybe the difference lay in the Vette's exhaust? I'm sure we'll be able to make the difference up in short order.

It's possible the Corvettes drivetrain is more efficient as the Corvette is a lighter car (ie it's drive train components don't need to be as heavy).

[gunslinger]

Originally Posted by 65535

Due to the fact that the car is stationary on the dyno, inertia is zero.. So curb weight makes no difference whatsoever in recorded hp numbers

Yeah, but I meant the IRS is probably a little lighter in mass because it doesn't have to withstand the weight of a 4000Lbs car.

[gunslinger]

Originally Posted by JJ#48Racing

HP is a multiplication of TQ, so if TQ is multiplied by gears, then the gears indirectly affect HP. Fwhp is not affected by gears, but rwhp is.

Not quite, RWHP is not affected by gears(except for the additional frictional/efficiency loss).On a dyno, only one gear is used and with lower numerical gear ratios, the increase in MPH at the dyno drum is greater than with higher numerical gear ratios.

For example, with 3.45, lets say that the MPH increased from 30MPH at 3000RPM in 4th gear to 80 MPH at 6500 (all theoretical) in X amount of time.

With 4.10 gears, the MPH increase would be from say 20-60 MPH, in Y period of time for the same RPM's.

Because the 3.45's had a larger increase of MPH (50) in a longer period and the 4.10 had a smaller (40MPH) increase in shorter period, it all "evens" out as the interia drum on the dyno saw the same increase in acceleration and measures that as HP.

Now on the street where more than one gear is used, there is a HUGE difference with higher numerical gears. You essentially trade top end speed for quicker stop light to stop light acceleration (or from 0-1320 FT in the case of the 1/4 mile).

Also, since the Camaro is limited to 155MPH, a set of gears might not be a bad idea...

[gunslinger]

Originally Posted by Italianwhiplash

Yet I've pulled 411 with a stock challenger srt-8

I am going to call BS on this one, without some supporting and legitimate documentation.

[SummoneR]

Originally Posted by NightmareSS

didnt really seem like it wanted to go somewhere like i see on most dyno test....kinda seemed like he was real gentle on it...unless it was automatic...usually during shift changes the car jerks a lil like it wants to take off

That's what I was thinking, it did not appear to be distressed.

[1fastdog]

Originally Posted by Crowley

For the manual these days I would say 12% is what you should average at .. anything else is just making excuses for low results ..

If you use 15%, that means stock, my 2001 LS1 was making 360HP at the crank and my 04 Cobra w/ just a K&N FIPK was making 470 HP at the crank ... Also, the stock G8 GXP that they tested was making 436hp at the crank ..

12 % loss max is more like it for a manual. I would accept 15% loss for the automatic ..

Crowley

Dyno pass arguments are pretty pointless without all the info.

My question would be this, as I don't see the numbers quoted as being dead on enough to be accurate.

WHY?

The torque number quoted was 371LbsFt... and 363HP.

Anyone other than myself find it a bit strange that an NA motor which is stock, and not a diesel, is showing a higher torque number than HP on a dyno pass.

The LS3 for the SS is rated at 426HP@420Lbsft.

A 371 LBSft is next to dead on for a 12% driveline loss... Good for a 13% loss. Better at 14%, Even better still at 15%.

Roller dynos calculate hp by extrapolating torque. They read torque and calculate HP through software.

I think its great someone strapped the car down and spun the Dynojet with it.

I don't infer the numbers are fudged, or meant to get folks going.

Folks taking a dyno that looks a bit odd on it's face, and getting worked up as if it were gospel is not founded.

HOWEVER... 364HP@371torque is not what would be expected, regardless of drivetrain loss percentage. Now, reverse the numbers for torque and HP and it would make more sense.

[radz28]

I think these are great numbers. I'm sure the car will make a little more power after breakin.

[THE EVIL TW1N]

Originally Posted by bobby35ny

same dyno, the G8 GXP made 351.
Camaro makes 13hp more, thats seems right to me, I think the g8 makes 415 from gm no?

just checked things, ya 415 from GM, 11 diff. looks like camaro did even better..

-bobby

65355 says the below which I kind of agree with.
I'm thinking intake/exhaust bottleneck OR which I fear..........driveline lose maybe due to the irs design?

Wish there were a way to test the amount of loss through the drivetrain.

1) Either Chevy's numbers are overstated for crank hp
2) Or Dodge's numbers are understated
3) Or there is a large difference in driveline loss between the two cars. (doubt it since it's an identical trans...)

being that the LS3 is an SAE certified engine, it likely is not overstated. The 6.1 hemi (all hemi's, really) are NOT SAE certified, meaning it is possible they do make a little more power than their advertised 425 hp. Dodge probably chose 425 hp so that it would match their old hemi's for marketing purposes.

from what I've seen 12% driveline losses seems to be the standard for manuals, 15% or so for auto's.

[DGthe3]

Originally Posted by 1fastdog

Dyno pass arguments are pretty pointless without all the info.

My question would be this, as I don't see the numbers quoted as being dead on enough to be accurate.

WHY?

The torque number quoted was 371LbsFt... and 363HP.

Anyone other than myself find it a bit strange that an NA motor which is stock, and not a diesel, is showing a higher torque number than HP on a dyno pass.

The LS3 for the SS is rated at 426HP@420Lbsft.

A 371 LBSft is next to dead on for a 12% driveline loss... Good for a 13% loss. Better at 14%, Even better still at 15%.

Roller dynos calculate hp by extrapolating torque. They read torque and calculate HP through software.

I think its great someone strapped the car down and spun the Dynojet with it.

I don't infer the numbers are fudged, or meant to get folks going.

Folks taking a dyno that looks a bit odd on it's face, and getting worked up as if it were gospel is not founded.

HOWEVER... 364HP@371torque is not what would be expected, regardless of drivetrain loss percentage. Now, reverse the numbers for torque and HP and it would make more sense.

I'm ashamed to admit, I never even noticed the torque. You are right that swapping hp and torque would put the numbers closer to spec.

[Italianwhiplash]

Originally Posted by THE EVIL TW1N

being that the LS3 is an SAE certified engine, it likely is not overstated. The 6.1 hemi (all hemi's, really) are NOT SAE certified, meaning it is possible they do make a little more power than their advertised 425 hp. Dodge probably chose 425 hp so that it would match their old hemi's for marketing purposes.

from what I've seen 12% driveline losses seems to be the standard for manuals, 15% or so for auto's.

exactly, Im just interested in seeing how the camaro does after the break in period. Can't wait

[Design1stCode2nd]

Isn't about 12%-15% normal drivetrain loss for RWD cars? Seems spot on to me.

[JJ#48Racing]

Originally Posted by gunslinger

Not quite, RWHP is not affected by gears(except for the additional frictional/efficiency loss).On a dyno, only one gear is used and with lower numerical gear ratios, the increase in MPH at the dyno drum is greater than with higher numerical gear ratios.

For example, with 3.45, lets say that the MPH increased from 30MPH at 3000RPM in 4th gear to 80 MPH at 6500 (all theoretical) in X amount of time.

With 4.10 gears, the MPH increase would be from say 20-60 MPH, in Y period of time for the same RPM's.

Because the 3.45's had a larger increase of MPH (50) in a longer period and the 4.10 had a smaller (40MPH) increase in shorter period, it all "evens" out as the interia drum on the dyno saw the same increase in acceleration and measures that as HP.

Now on the street where more than one gear is used, there is a HUGE difference with higher numerical gears. You essentially trade top end speed for quicker stop light to stop light acceleration (or from 0-1320 FT in the case of the 1/4 mile).

Also, since the Camaro is limited to 155MPH, a set of gears might not be a bad idea...

I agree with you completely. What I was getting at was that because of the increase in friction that say 4.10's have over say 3.45's, the number that shows up on the computer screen will be lower.

[Baughman]

Originally Posted by garagelogic

You guys are killing me. Just because the Camaro received a LS3, the same engine nomenclature that went into the Corvette, it does not mean it will duplicate it's power output. There are too many variables. Exhaust efficiency, factory tune, cam profiles, etc. could be, and probably are, diffrent between the Corvette LS3 and the Camaro LS3. Also, atmospheric factors play a big role as well as mileage on the engine at the time it was dynoed.

Those numbers are great, even if they are less than what others have gotten with the same engine in a Corvette. Geez, just be happy you have a Camaro available to buy at all.

Completely agree here

[Italianwhiplash]

Originally Posted by gunslinger

I am going to call BS on this one, without some supporting and legitimate documentation.

its on youtube also, friend pulled 420 in his. mine is in the dyno day segment. Search Up No Limit Motorsports should be under their videos . it's a local dyno/tuning place here on li