LS3 and L99 engine dyno test - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ULTRAZLS1 · 09-19-2010, 06:55 AM

http://www.**************************-...l#post13882913

Stock on engine dyno with headers and no accessories.

Nearly 500hp for the LS3...must take a lot of hp to get this pig moving lol.

Napper · 09-19-2010, 07:07 AM

don't add to the fuel.

the SS is a great car. GM did leave some things for us to do.

everyone is thinking power...we need to address the suspenion.

Once thats done....even minimal power gains will result in et's worthy of the SS name.

I know this . i went down in hp and tq ( lowered my psi by 1.5) and added key suspension peices.

Since i've done that. My SS (L99) has been good to me.

the SS is not a pig.....it needs to be finalized. GM was in the mist of going down when realeased.

take a bone stock SS powertrain and add the proper suspension piece and watch the et drop.

Jefe's SS · 09-19-2010, 10:12 AM

So according to the graph the L99 and the LS3 are underrated from the factory? Way underated!
Don't many tuners get lower base numbers? Numbers that confirm Chevy's factory ratings?

flyby · 09-19-2010, 10:24 AM

What napper said. Suspension upgrades yield great driving increases. A good tuner will be able to pick up some added HP, usually more than any bolt on, GM did leave some on the table but not as much as in the past. The Camaro is an awesome car, if you plan on modifying the car I would start with the foundation (suspension) then you have a good starting platform to build upon. Just my .02

VR Baron · 09-19-2010, 10:50 AM

Quote:

Originally Posted by flyby

What napper said. Suspension upgrades yield great driving increases. A good tuner will be able to pick up some added HP, usually more than any bolt on, GM did leave some on the table but not as much as in the past. The Camaro is an awesome car, if you plan on modifying the car I would start with the foundation (suspension) then you have a good starting platform to build upon. Just my .02

I agree. On my 98 z28 suspension, even though setup more for handling addressed alot of the slop left in the system and can reduce times and help launches. Some basic setups got up to 2-3 tenths off just because the car hooked up better.Need to get the power to the ground as good as possible.

As far as being underated I know the LS1's were by about 35hp,didn't want to piss off the corvette guys. And as the car breaks in we would get 10-15 more rwhp and .2+ 2 mph faster. I am wondering if my v6 didn't get more hp after breaking in also as I see alot of new and seasoned dyno numbers and must be getting more broken in which would make sense.

usmc8411 · 09-19-2010, 10:54 AM

Those were engine dynos with no accessories I believe. Thats not how they are rated from the factory.

So you have 500 minus 30ish for the headers and cai and you have about 470....minus spinning stock accessories such as power steering, water pump, a/c, alternator, belt tensioner and you are probably only a few hp off that 426 rating.

ackeight · 09-19-2010, 12:26 PM

Quote:

Originally Posted by usmc8411

Those were engine dynos with no accessories I believe. Thats not how they are rated from the factory.

So you have 500 minus 30ish for the headers and cai and you have about 470....minus spinning stock accessories such as power steering, water pump, a/c, alternator, belt tensioner and you are probably only a few hp off that 426 rating.

Dito

ULTRAZLS1 · 09-19-2010, 04:40 PM

Quote:

Originally Posted by Napper

don't add to the fuel.

the SS is a great car. GM did leave some things for us to do.

everyone is thinking power...we need to address the suspenion.

Once thats done....even minimal power gains will result in et's worthy of the SS name.

I know this . i went down in hp and tq ( lowered my psi by 1.5) and added key suspension peices.

Since i've done that. My SS (L99) has been good to me.

the SS is not a pig.....it needs to be finalized. GM was in the mist of going down when realeased.

take a bone stock SS powertrain and add the proper suspension piece and watch the et drop.

Dude...I am just passing along information of an engine dyno test. I know what the car is capable of etc etc

As far as the car being a pig...I meant this as the car is heavy...nothing more. I love the car obviously...I bought one. But 3800+ pounds for a sports car is a bit portly.

For those talking about under rating.....no it is not. This was with no accessories, a cold air intake and dyno headers. It is interesting that it is showing a 30hp difference form the L99. Due to the + or - 1% variance allowed by SAE I am sure the LS3 is making 430hp just like it is in the vette...thus a 30hp difference from the L99.

SGOS252382 · 09-19-2010, 05:01 PM

Up to 4500 rpms, the LS3 and L99 make basically the same HP. The LS3 shines from 4500 - 6500 rpms.

Jose · 09-19-2010, 05:34 PM

The basic HP difference is the automatic engine L99 have the feature of turning off 4 cylinders when the crruise control is on, this changes the valve system, that's were the 26hp differece comes in.

ULTRAZLS1 · 09-19-2010, 06:02 PM

Quote:

Originally Posted by Jose

The basic HP difference is the automatic engine L99 have the feature of turning off 4 cylinders when the crruise control is on, this changes the valve system, that's were the 26hp differece comes in.

A couple different independent dynos (as well as this one) have shown a 30hp + difference.

And its not just that...the L99 is lower compression, has a smaller cam and has a lower RPM fuel cut off (because of the smaller cam)

usmc8411 · 09-19-2010, 06:07 PM

Quote:

Originally Posted by Jose

The basic HP difference is the automatic engine L99 have the feature of turning off 4 cylinders when the crruise control is on, this changes the valve system, that's were the 26hp differece comes in.

Why do people continually make things up on this site without fact checking what they are about to tell thousands of people...that will in turn read false information and spread it themselves?

The HP difference comes from the l99 having a lower compression ratio due to uisng notched pistons, and running a different cam.

It has zero to due with AFM...which has nothing to due with cruise control.

383ss · 09-19-2010, 06:21 PM

Quote:

Originally Posted by Napper

don't add to the fuel.

the SS is a great car. GM did leave some things for us to do.

everyone is thinking power...we need to address the suspenion.

Once thats done....even minimal power gains will result in et's worthy of the SS name.

I know this . i went down in hp and tq ( lowered my psi by 1.5) and added key suspension peices.

Since i've done that. My SS (L99) has been good to me.

the SS is not a pig.....it needs to be finalized. GM was in the mist of going down when realeased.

take a bone stock SS powertrain and add the proper suspension piece and watch the et drop.

ffrcobra_65 · 09-19-2010, 11:45 PM

Quote:

Originally Posted by Jose

The basic HP difference is the automatic engine L99 have the feature of turning off 4 cylinders when the crruise control is on, this changes the valve system, that's were the 26hp differece comes in.

09-19-2010, 06:55 AM	#1
ULTRAZLS1 Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009 Location: Jackson, Michigan Posts: 4,407	LS3 and L99 engine dyno test http://www.**************************-...l#post13882913 Stock on engine dyno with headers and no accessories. Nearly 500hp for the LS3...must take a lot of hp to get this pig moving lol.

09-19-2010, 07:07 AM	#2
Napper Drives: 2SS RS A6/ CTS-V A6 LSA Join Date: Mar 2010 Location: SE Florida Posts: 258	don't add to the fuel. the SS is a great car. GM did leave some things for us to do. everyone is thinking power...we need to address the suspenion. Once thats done....even minimal power gains will result in et's worthy of the SS name. I know this . i went down in hp and tq ( lowered my psi by 1.5) and added key suspension peices. Since i've done that. My SS (L99) has been good to me. the SS is not a pig.....it needs to be finalized. GM was in the mist of going down when realeased. take a bone stock SS powertrain and add the proper suspension piece and watch the et drop. __________________ 10 2SS(7Psi)/10 CTS-V(9Psi) L99, ADM RACE CAI, TVS 2300,LG- Headers and X pipe ,catless 3 inch back w/Magnaflows , Ngk plugs,Msd wires,180 stat,Springs ( lowered 1"- looks solidly correct)Sways and endlinks,BMR trailing arms, Slotted rotors and Hawk HPS ,tuned ,Black out bowtie and custom (black)"SS" on sides /midnight rims (8psi) 2010 Raven (triple black.)CTS-v , crank pulley, Bubb CAI , AR Headers, custom catlessback. magnaflows. tune ( 9psi) former LS7, LS2 and LS1 owner.(Zo6, GTO's, WS6)

09-19-2010, 05:34 PM	#10
Jose Drives: 2010 Camaro 2SS/RS White S/C Join Date: Aug 2010 Location: Puerto Rico Posts: 842 View My Garage	The basic HP difference is the automatic engine L99 have the feature of turning off 4 cylinders when the crruise control is on, this changes the valve system, that's were the 26hp differece comes in. __________________ "It does not matter if you win or loose, what matters is if I win" Carl Fogarty

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09-19-2010, 10:12 AM	#3
Jefe's SS Drives: 2010 2SS/RS IOM L99 Join Date: Jul 2010 Location: Thornton, CO Posts: 339	So according to the graph the L99 and the LS3 are underrated from the factory? Way underated! Don't many tuners get lower base numbers? Numbers that confirm Chevy's factory ratings?

09-19-2010, 10:24 AM	#4
flyby Drives: 2010 Silver SS Join Date: Sep 2009 Location: Glen Gardner, NJ Posts: 1,336 View My Garage	What napper said. Suspension upgrades yield great driving increases. A good tuner will be able to pick up some added HP, usually more than any bolt on, GM did leave some on the table but not as much as in the past. The Camaro is an awesome car, if you plan on modifying the car I would start with the foundation (suspension) then you have a good starting platform to build upon. Just my .02

09-19-2010, 10:54 AM	#6
usmc8411 Account Suspended Drives: 2010 camaro Join Date: Sep 2010 Location: hannibal mo Posts: 207	Those were engine dynos with no accessories I believe. Thats not how they are rated from the factory. So you have 500 minus 30ish for the headers and cai and you have about 470....minus spinning stock accessories such as power steering, water pump, a/c, alternator, belt tensioner and you are probably only a few hp off that 426 rating.

09-19-2010, 05:01 PM	#9
SGOS252382 Drives: 2010 Camaro 2SS/RS Join Date: Mar 2008 Location: S.W. Florida Posts: 6,294	Up to 4500 rpms, the LS3 and L99 make basically the same HP. The LS3 shines from 4500 - 6500 rpms.