2013 SS are we now at 430HP?

[Camarowguy]

How much power does the pump really use when your going straight? I've tried running at the strip with the pump and without with no seen difference. But hey, if you wanna self rate your car at 430hp, go right ahead. Lmao

[Scott@Bjorn3D]

Originally Posted by Camarowguy

How much power does the pump really use when your going straight? I've tried running at the strip with the pump and without with no seen difference. But hey, if you wanna self rate your car at 430hp, go right ahead. Lmao

Ha Ha, no do not want to say it is something that it is not. I would just think we are right at Vette HP rating now.

[MR 45TH]

426...430 does it really matter?

[Camarowguy]

Originally Posted by MR 45TH

426...430 does it really matter?

Agreed

[el ess A]

HP ratings from the factory are unlikely to change unless there was a business advantage to do so. Look at the printed advertising that would instantly go obsolete if it does. Dropping a PS pump isn't worth the change in printing costs. Now, if they got those 50+ HP back, then I bet it would happen.

The advertised ratings, as they've always been, are just that. Real world ratings, as they've always been, are subject to change a little.

I don't know of any legal requirements surrounding this, but I'm guessing a percentage plus or minus from advertised ratings is allowable.

[1SSFever]

I do not believe that it consumes 54 horsepower to run the accessories, that is ridiculous.
Maybe 10 HP at best to freewheel the A/C and run the alternator, water pump, and steering. Please cite a source to back up these claims.

This 2013 exhaust is bound to produce more peak horsepower, how little is to be seen on dyno, probably not felt in stock form. This system will probably respond better to aftermarket headers compared to the regular exhaust.

[LSxJunkie]

Originally Posted by CamaroSkooter

The rating is at the flywheel. So, neither of those objects would affect the horsepower rating at the flywheel.

No.

Originally Posted by newagemuscle

I just checked on Chevy's web site. The optional dual-mode exhaust on the Corvette gives an additional 6hp and 4tq according to the web site. I don't see why the Camaro would not profit the same.

The base exhausts are different. The stock Camaro exhaust flows VERY well. Non-NPP C6s are virtually silent.

Originally Posted by 1SSFever

I do not believe that it consumes 54 horsepower to run the accessories, that is ridiculous.
Maybe 10 HP at best to freewheel the A/C and run the alternator, water pump, and steering. Please cite a source to back up these claims.

This 2013 exhaust is bound to produce more peak horsepower, how little is to be seen on dyno, probably not felt in stock form. This system will probably respond better to aftermarket headers compared to the regular exhaust.

Most of those are pumps. The faster you spin a pump, the more resistance it is going to give you because you are trying to force more fluid through the same space, and we all know fluids don't like to compress. You may be able to spin a water pump with your hand, but try spinning it as fast as it spins at 6500rpm.

[1SSFever]

Originally Posted by LSxJunkie

Most of those are pumps. The faster you spin a pump, the more resistance it is going to give you because you are trying to force more fluid through the same space, and we all know fluids don't like to compress. You may be able to spin a water pump with your hand, but try spinning it as fast as it spins at 6500rpm.

The power steering pump isn't much larger than your oil pump, and it has a relief valve. Water pumps do not build up excessive pressure are commonly run off of motors no larger than the one on your hand drill. And an alternator no problem either, they test those with 1/3HP motors running them.

Where is this 54HP supposedly going?

[Jim968]

Originally Posted by CamaroSkooter

The rating is at the flywheel. So, neither of those objects would affect the horsepower rating at the flywheel.

Incorrect. Both have the potential to impact flywheel hp. Whether they do or not, and by how much is the question. We can't answer it directly, but we can do so indirectly via RWHP on a dyno.

I'm willing to put my stock 2013 NPP equipped SS M6 on my local Dynojet 248, however it won't mean much without a comparison run by a stock 2012 or prior SS M6. Anyone with such a car in southwest Ohio care to join me?

[MMC]

The alternator picks up the load of the power steering pump to provide power for the assist.

[CamaroSkooter]

Like stieger, I stand corrected.

I was not aware that, during SAE ratings, there was anything connected to the front of the engine. Obviously, if anything attached to the serpentine belt in 2010 was removed in later model years and replaced with a non-hydraulic version (i.e. electric) then it stands to reason that the load on the engine would be reduced and thus increase the total output of the engine at the flywheel.

However, changing from the stock SS exhaust to dual-mode exhaust will not increase the flywheel rating. I imagine there could be a bump in rwhp, but how much remains to be seen considering the Camaro exhaust and the Corvette exhaust are very different setups.

[MLL67RSSS]

One of the biggest changes for SAE gross to SAE net was the engine has to be fitted out with all accessories it would have on the car. Also when the manufacturers do the certified,published testing an independent SAE engineer must be present during any and all testing to eliminate any "funny business."

SAE net horsepower
The brake power (power available at the flywheel or output shaft -- usually the crankshaft) of a fully equipped engine fitted with all the accessories necessary to perform its intended functions unaided. In 1973, automobile manufacturers began publishing their engine specifications in net horsepower and net torque instead of gross figures. In many cases the published numbers were significantly lower in 1973 than in 1972. Some of the decrease was attributed to the addition of pollution equipment, the lowering of compression, and the use of regular unleaded gasoline instead of premium leaded fuel. However most of the decrease in number was a switch to net figures.

http://www.motorera.com/dictionary/sa.htm

Also consider that you can gain a few HP (~15) just by utilizing underdrive pulleys, so eliminating the accessory all together (if they could) would gain even more. I would think that the power steering pump would be a bigger loss than the increased load of an electric PS pump on the alternator, probably why they go to those.

[Jim968]

Originally Posted by CamaroSkooter

However, changing from the stock SS exhaust to dual-mode exhaust will not increase the flywheel rating. I imagine there could be a bump in rwhp, but how much remains to be seen considering the Camaro exhaust and the Corvette exhaust are very different setups.

If you're saying that the exhaust is not hooked up when testing flywheel hp on an engine dyno you're incorrect. Exhaust is most definitely hooked up.

[SlingShot]

Originally Posted by 1SSFever

I do not believe that it consumes 54 horsepower to run the accessories, that is ridiculous.
Maybe 10 HP at best to freewheel the A/C and run the alternator, water pump, and steering. Please cite a source to back up these claims.

This 2013 exhaust is bound to produce more peak horsepower, how little is to be seen on dyno, probably not felt in stock form. This system will probably respond better to aftermarket headers compared to the regular exhaust.

The test was done in 09 when the 5th Gen was first released. It was done, I believe by Hp TV then broadcast on the Speed Channel. They actually setup a LS3 on a engine dyno, to test the actual output without all the belts and pulleys attached.

There is a writeup in one of the performance mags online, just don't remember which one it was.