why the lost hp - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jordan 572 · 10-31-2008, 03:12 PM

why does the ls3 loose 8 hp when it has the same engine as the vette

Mattsack789 · 10-31-2008, 03:19 PM

Because of the weight and proportion difference. If the 2 cars have different weights, they aren't going to have the same power.

headpunter · 10-31-2008, 03:24 PM

marketing + the tune is more orientated towards MPG.

dieseldave24v · 10-31-2008, 03:24 PM

Quote:

Originally Posted by Mattsack789

Because of the weight and proportion difference. If the 2 cars have different weights, they aren't going to have the same power.

Not trying to start a war here, but please clarify what you mean by your statment. HP and TQ numbers from auto manufactures are rated at the flywheel not the wheels. A 300 HP engine make 300 HP weather it is in a dumptruck or a 1800lbs carbon fiber track car.

Further more even if it was rated at the wheels the weight of the car has nothing to do with the power it produces, just the effect the power has on the car. If you had two cars with the same engine tranny and rear axle ratios the numbers would be the same on a dyno reguardless of the weight differences between the two cars.

Crowley · 10-31-2008, 03:27 PM

I would guess it would be something to do with the SAE J1349 dyno testing that is used to officially give the SAE Engine HP/TQ numbers. Remember, the current numbers are expected numbers, but until they release the Certified numbers, we don't know what it will really put down. I think the G8 GXP put down 15hp/15tq more than they expected.

I would think it would have to do with Intake / ECU / Exhaust differences .. add them up and the engine may not be quite as efficient as the same setup in the vette ..

http://www.sae.org/certifiedpower/details.htm

Crowley

theholycow · 10-31-2008, 03:28 PM

Quote:

Originally Posted by dieseldave24v

Not trying to start a war here, but [...]

I was thinking the same thing.

baileyrx · 10-31-2008, 03:29 PM

its the TUNE!!!!!!

camaro5 · 10-31-2008, 03:36 PM

Simple intake and exhaust varibles.

toehead93 · 10-31-2008, 04:08 PM

Isn't a vette tuned for 93 octane? The Camaro is tuned for 89 octane and better gas milage.

camaro5 · 10-31-2008, 04:45 PM

Any LS3 can use regular, but premium is recommended.

They have ping (detonation) sensors that retard the ignition advance for lower octane fuel.

However, the engine makes less power with low octane, and it has been shown to be cost effective to use premium due to the increased fuel mileage that results.

Not to mention, it feels better when you step on it.

Angrybird 12 · 10-31-2008, 09:49 PM

Quote:

Originally Posted by jordan 572

why does the ls3 loose 8 hp when it has the same engine as the vette

The Vette has a freer flowing exhaust and intake. But the figures as noted are not official figures as of yet, they are projected figures.

blackZbandit · 10-31-2008, 11:30 PM

Not denouncing the other explanations (beside the weight hypothesis) because they're all likely to be true, but nothing with a bow-tie is supposed to have more power than a Vette. GNX anyone?

LSxJunkie · 11-01-2008, 12:38 AM

Marketing.

Oh, and weight has NOTHING to do with how much power a car makes. The only way weight would effect power numbers if if there's a drastic difference in the weight of the driveshaft, rear gears, half shafts, or rims and cars were advertised on whp, not bhp.

Dave McFly · 11-01-2008, 12:41 AM

plus to put my $0.02 here it has been common knowledge that GM does not want cars that are smaller and lower priced to have more power than the flagship vette. even in 4th gens back was like that.

10-31-2008, 03:12 PM	#1
jordan 572 Drives: none Join Date: Jul 2008 Location: MN Posts: 1,720 View My Garage	why the lost hp why does the ls3 loose 8 hp when it has the same engine as the vette

10-31-2008, 03:19 PM	#2
Mattsack789 Drives: 2010 Camaro SS Join Date: Oct 2008 Location: Virginia Posts: 217	Because of the weight and proportion difference. If the 2 cars have different weights, they aren't going to have the same power. __________________

10-31-2008, 03:24 PM	#3
headpunter Not That sad..considering Drives: Man Join Date: Aug 2007 Location: the part of washington the capital forgot about. Posts: 3,747 View My Garage	marketing + the tune is more orientated towards MPG. __________________ Stop Whinging

10-31-2008, 03:27 PM	#5
Crowley Okie doke Drives: 2012 GT500 Join Date: Sep 2008 Location: McKinney Texas Posts: 3,568 View My Garage	I would guess it would be something to do with the SAE J1349 dyno testing that is used to officially give the SAE Engine HP/TQ numbers. Remember, the current numbers are expected numbers, but until they release the Certified numbers, we don't know what it will really put down. I think the G8 GXP put down 15hp/15tq more than they expected. I would think it would have to do with Intake / ECU / Exhaust differences .. add them up and the engine may not be quite as efficient as the same setup in the vette .. http://www.sae.org/certifiedpower/details.htm Crowley __________________

10-31-2008, 04:45 PM	#10
camaro5 Drives: X-15 Velocipede Join Date: Mar 2008 Location: SW Florida Posts: 4,637	Any LS3 can use regular, but premium is recommended. They have ping (detonation) sensors that retard the ignition advance for lower octane fuel. However, the engine makes less power with low octane, and it has been shown to be cost effective to use premium due to the increased fuel mileage that results. Not to mention, it feels better when you step on it. __________________ Go from the presence of a foolish man, when thou perceivest not in him the lips of knowledge General Motors ASEP, A.S. Automotive Technology, Telecommunications Specialist, CISCO Network Engineer STANDARD DISCLAIMER camaro5 is furnishing this information "as is". camaro5 does not provide any warranty of the information whatsoever, whether express, implied, or statutory, including, but not limited to, any warranty of merchantability or fitness for a particular purpose or any warranty that the contents of the information will be error-free.

10-31-2008, 03:29 PM	#7
baileyrx Drives: 2003 g35 Join Date: Apr 2008 Location: nc Posts: 198 View My Garage	its the TUNE!!!!!!

10-31-2008, 03:36 PM	#8
camaro5 Drives: X-15 Velocipede Join Date: Mar 2008 Location: SW Florida Posts: 4,637	Simple intake and exhaust varibles.

10-31-2008, 04:08 PM	#9
toehead93 Drives: 2014 2SS/1LE Join Date: Feb 2007 Location: wpb fl Posts: 3,136 View My Garage	Isn't a vette tuned for 93 octane? The Camaro is tuned for 89 octane and better gas milage.

10-31-2008, 11:30 PM	#12
blackZbandit Drives: BLACK ON BLACK 2012 CAMARO SS Join Date: Feb 2008 Location: LOS ANGELES, CA Posts: 743 View My Garage	Not denouncing the other explanations (beside the weight hypothesis) because they're all likely to be true, but nothing with a bow-tie is supposed to have more power than a Vette. GNX anyone? __________________ BLACK CAR + FLAT BLACK STRIPES + BLACK WHEELS = BLK PW3R!! **Thanks to Silver Streak for the pic I used to make this sig**

11-01-2008, 12:38 AM	#13
LSxJunkie Snark snark snark Drives: RX350 Join Date: Sep 2008 Location: 3L Hell Posts: 555	Marketing. Oh, and weight has NOTHING to do with how much power a car makes. The only way weight would effect power numbers if if there's a drastic difference in the weight of the driveshaft, rear gears, half shafts, or rims and cars were advertised on whp, not bhp. __________________ What is this, CorvetteForum Lite?

11-01-2008, 12:41 AM	#14
Dave McFly new car smell Drives: 2007 Ford Mustang 'Natasha' Join Date: Jan 2007 Location: Jamestown, NY Posts: 2,127 View My Garage	plus to put my $0.02 here it has been common knowledge that GM does not want cars that are smaller and lower priced to have more power than the flagship vette. even in 4th gens back was like that. __________________ "May the forces of evil become confused on the way to your house." George Carlin

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