L99 only 310 rwhp? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Hemlawk · 06-26-2009, 05:10 AM

It doesnt sound right... I thought it would be around 350

Sorry if this is a repost

ADM PERFORMANCE · 06-26-2009, 05:23 AM

The automatic car we ran on our dyno made 312...So it looks like your right on par.Our shop car made 352 and it is a 6 spd manual...Ours seems to be right on with the 16% drivetrain loss.

Andy

Ject · 06-26-2009, 05:35 AM

take into consideration weather conditions effect a car... some people have been getting around 320 - 325rwhp on the L99...

gotpball44 · 06-26-2009, 05:40 AM

man that seems low, i would also think 350 rwhp. My Manual one is making 380rwhp. So i would say 30-40 hp less than manuals would be right.

rpepka · 06-26-2009, 05:52 AM

So How much hp at the flywheel? 360?

TomServo · 06-26-2009, 06:33 AM

Odd, LS3 A6 Corvette are putting down 350 to 360 RWHP and M6 vettes between 370 amd 380. Something is wrong.

ElAntonius · 06-26-2009, 06:50 AM

Keep in mind that different dynos are more or less onservative. Also, automatic transmissions have greater drivetrain loss from manuals, and are a bit more difficult to dyno accurately...on top of the 26 hp loss from the manual by spec.

That being said, I've seen auto dynos on this forum ranging from 310-330 or so, so you're not really out of whack for a somewhat conservative dyno.

carguy · 06-26-2009, 06:51 AM

Quote:

Originally Posted by TomServo

Odd, LS3 A6 Corvette are putting down 350 to 360 RWHP and M6 vettes between 370 amd 380. Something is wrong.

Open up that exhaust ! Makes a huge Difference.

Put AR LT and corsa exhuuast and Really makes a big difference. Exaust manifolds are really restrictive compared to a corvette. Exhaust manifolds are like Bricks.

Haven't Dynoed Results yet. Its Like 99 degrees and 100 percent humidity here last several days. Not exactly Great weather For Dynoing.

Putting a Hennesy Supercharger kIT ON in July hasn't arrived yet so I want to get another baseline before I put it on but this weather needs to break a little ( Sorry Mine is a 6 speed Manual) I will post numbers before and after.

carguy · 06-26-2009, 06:54 AM

FYI...LS motors run a lot stronger with a few miles on them. Try again after about 5 thousand miles. It only gets better from there. My 99 SS Is just peaking....at 15,000 miles. Really runs alot stronger than new. Rings are set etc. Much more noticabe than the old Chevy motors

Verio · 06-26-2009, 07:15 AM

Quote:

Originally Posted by Matt TuneTime

Yes we dynoed stock 329 hp and 338 tq ... LOL we have another shoot out with them again ...

This is taken from the Dragstrip subforum.

Why are the Dyno's so inconsistent??? Hell, he ran low 13's bone stock, and sub 13 after a simple tune.

patriotpa · 06-26-2009, 07:34 AM

Quote:

Originally Posted by Verio

This is taken from the Dragstrip subforum.

Why are the Dynos so inconsistent???

Because they require user input. If they were 100% automatic, with periodic, traceable calibration, there wouldn't be such variation.

pharmd · 06-26-2009, 09:06 AM

You cannot compare dyno's plain and simple. Use them only for tuning and to do before and after's to measure gain from a modification. You guys will drive yourselves crazy trying to compare guy A's dyno result to guy B's. Different dyno, different weather, different elevations, different user inputs, auto vs manual...

You also should be real careful comparing track times if you aren't running at the same track...elevation and weather make a huge difference. Those Tune Time and New Era runs are up in New England...Atco's DA for Matt's runs was like +600...us guys in the South are seeing DA over +3000...this can make a huge difference in ET/mph.

Also you really can't compare the Vette Auto to the Camaro...Our L99 has a number of differences that will affect performance: less compression, different cam, different tuning, more restrictive exhaust, different factory CAI tract, cylinder deactivation complications etc. Understand, you will have to perform some mods to make the auto a formitable player, stock it really kinda sucks...even the G8's are sticking it to the camaro really.

SomeGeoffGuy · 06-26-2009, 10:25 AM

If I had to guess i would think that the valvetrain differences between the LS3 and L99 are accounting for a big chunk of the difference. The AFM system has unique lifters, so maybe they are limiting how aggressive the cams can be. Any know the cam specs?

-Geoff

THE EVIL TW1N · 06-26-2009, 11:45 AM

I have a small database (not much info out there) that I have compiled.

The average L99 has dyno'ed 320 rwhp, the average LS3 is 367 rwhp.

06-26-2009, 05:10 AM	#1
Hemlawk AwesomeBillDawesonville Drives: CGM 2SS/RS =) Join Date: May 2009 Location: Jersey Shore Posts: 2,067	L99 only 310 rwhp? It doesnt sound right... I thought it would be around 350 Sorry if this is a repost __________________ Order placed on 1/13/11 - Purchased 2/22/11 2SS/RS CGM

06-26-2009, 05:35 AM	#3
Ject aka Patrick Drives: '10 Camaro 2SS '04 Silverado Join Date: Jan 2009 Location: Derby Kansas Posts: 3,072	take into consideration weather conditions effect a car... some people have been getting around 320 - 325rwhp on the L99... __________________ Current Modifications: Your average Bolt-ons & Suspension Upgrades GForce Engineering: 9" Rear End, Strange Pro Iron Case w/Moser Nodular 3.70:1 Detroit locker, 3.5" Solid Drive Shaft

06-26-2009, 06:50 AM	#7
ElAntonius Drives: 2010 Camaro 1SS A6 Join Date: Apr 2009 Location: Tampa, FL Posts: 140 View My Garage	Keep in mind that different dynos are more or less onservative. Also, automatic transmissions have greater drivetrain loss from manuals, and are a bit more difficult to dyno accurately...on top of the 26 hp loss from the manual by spec. That being said, I've seen auto dynos on this forum ranging from 310-330 or so, so you're not really out of whack for a somewhat conservative dyno. __________________ A House Divided...

06-26-2009, 06:54 AM	#9
carguy Carguy Drives: 57Chevy,67,80,2@10's camaro's,04SSR Join Date: Jan 2009 Location: Freeport,IL Posts: 544	FYI...LS motors run a lot stronger with a few miles on them. Try again after about 5 thousand miles. It only gets better from there. My 99 SS Is just peaking....at 15,000 miles. Really runs alot stronger than new. Rings are set etc. Much more noticabe than the old Chevy motors __________________ 2010 SS/RS LS3, 21" Rims, SLP lowering Kit & sway bars, TVS2300, Hennesy CAI, Kooks LT Headrers & Cats, Corsa Exhaust, RIP Shift ST shifter, SLP Hood & Spoiler, Slp Black out package - Grill SS & Rear SS Emblems, ADM Dual Fuel Pump , 3.6 upper Pulley, 10% overdriven Innovators West Crank Pulley& Pin Kit. .................................................. ..............................

06-26-2009, 09:06 AM	#12
pharmd Master of Medicine Drives: 4th Gen Join Date: Oct 2008 Location: Kentucky Posts: 784	You cannot compare dyno's plain and simple. Use them only for tuning and to do before and after's to measure gain from a modification. You guys will drive yourselves crazy trying to compare guy A's dyno result to guy B's. Different dyno, different weather, different elevations, different user inputs, auto vs manual... You also should be real careful comparing track times if you aren't running at the same track...elevation and weather make a huge difference. Those Tune Time and New Era runs are up in New England...Atco's DA for Matt's runs was like +600...us guys in the South are seeing DA over +3000...this can make a huge difference in ET/mph. Also you really can't compare the Vette Auto to the Camaro...Our L99 has a number of differences that will affect performance: less compression, different cam, different tuning, more restrictive exhaust, different factory CAI tract, cylinder deactivation complications etc. Understand, you will have to perform some mods to make the auto a formitable player, stock it really kinda sucks...even the G8's are sticking it to the camaro really. __________________ 2002 Camaro SS. 408 LS2. 500+RWHP/480RWTQ. Full UMI RR suspension. Koni/Strano. 295F/315R. 3500#(55/45)

06-26-2009, 05:23 AM	#2
ADM PERFORMANCE Drives: Anything I want Join Date: Oct 2008 Location: DfW - Texas Posts: 5,405	The automatic car we ran on our dyno made 312...So it looks like your right on par.Our shop car made 352 and it is a 6 spd manual...Ours seems to be right on with the 16% drivetrain loss. Andy

06-26-2009, 05:40 AM	#4
gotpball44 Boost Is Your Friend Drives: 2016 Hyper Blue 1SS Camaro Join Date: Oct 2008 Location: La Mirada CA Posts: 1,255 View My Garage	man that seems low, i would also think 350 rwhp. My Manual one is making 380rwhp. So i would say 30-40 hp less than manuals would be right.

06-26-2009, 05:52 AM	#5
rpepka Drives: 2013 ZL1 # 2195 Join Date: Jun 2009 Location: Bradenton, FL Posts: 965	So How much hp at the flywheel? 360?

06-26-2009, 06:33 AM	#6
TomServo Drives: 2007 Z06 Join Date: Oct 2008 Location: Swansea IL Posts: 727	Odd, LS3 A6 Corvette are putting down 350 to 360 RWHP and M6 vettes between 370 amd 380. Something is wrong.

06-26-2009, 10:25 AM	#13
SomeGeoffGuy Drives: 2023 2SS Convertible Join Date: May 2009 Location: Metro Detroit Posts: 1,057	If I had to guess i would think that the valvetrain differences between the LS3 and L99 are accounting for a big chunk of the difference. The AFM system has unique lifters, so maybe they are limiting how aggressive the cams can be. Any know the cam specs? -Geoff __________________ '12 2SS RS Convertible - Traded in. '16 2SS Convertible - White on white, mag-ride, NPP, nav. Sold! '23 2SS Convertible -Same as above except orange.

06-26-2009, 11:45 AM	#14
THE EVIL TW1N Banned Drives: 2003 Cobra Convertible Join Date: Feb 2009 Location: CA Posts: 2,925	I have a small database (not much info out there) that I have compiled. The average L99 has dyno'ed 320 rwhp, the average LS3 is 367 rwhp.

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