Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Flowmaster Exhaust
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons

Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

Reply
 
Thread Tools
Old 08-11-2009, 11:25 AM   #1
GMRULZ

 
GMRULZ's Avatar
 
Drives: 2010 SS & 2008 C6
Join Date: Mar 2008
Location: VA
Posts: 1,825
Stock L99 Dynograph w/ some interesting info

I just dynoed mine to get a baseline (600 miles) and it put down 319rwhp twice then we pulled the pcm fuses for it to forget the LTFT (Long Term Fuel Trims), engine had more heatsoak than the first two pulls and it put down 327rwhp...Let me tell you picking up 8rwhp by doing that, this computer has a serious nanny program. The trans tune alone is going to be awesome. It really woke up my A6 Vette. I put ARH headers on it the day after and as soon as the Vararam is ready that will go on and I will get it tuned. So have faith o L99 bretheren...The curious thing I`ve noted is how there is a slight sip in the graph after 5250rpm`s then it picks back up, I`m assuming this may be when the VVT kicks out and is no longer making that extra midrange power. Any tuners can explain that? I`ve seen it on other L99 graphs, but not on the LS3 graphs...


__________________
2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter.

Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!

Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..

Last edited by GMRULZ; 08-24-2009 at 07:05 AM.
GMRULZ is offline   Reply With Quote
Old 08-11-2009, 11:36 AM   #2
Terrellford12
 
Drives: 2010 SS/RS
Join Date: Jan 2009
Location: Bunkie La
Posts: 268
What can i do to gain the extra 8 hp i have a l99 and what does this take from the car itself
Terrellford12 is offline   Reply With Quote
Old 08-11-2009, 11:42 AM   #3
GMRULZ

 
GMRULZ's Avatar
 
Drives: 2010 SS & 2008 C6
Join Date: Mar 2008
Location: VA
Posts: 1,825
Quote:
Originally Posted by Terrellford12 View Post
What can i do to gain the extra 8 hp i have a l99 and what does this take from the car itself
Remove the ECM fuse to clear the LTFT memory, then reinstall after a couple of minutes, it will relearn it though after some time and will need to be done again to get the power back. It is some sort of GM nanny thing evidently. The car won`t run w/ out the fuse being reinstalled if that was your question regarding what would it take away from the car.

You could install a Dash Hawk to clear it at the touch of a button from inside the car, but I`m hoping this bad learning can be tuned out or made not so sensitive so it doeesn`t take away so much power. I`m going to post this in the tuning section as a question.
__________________
2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter.

Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!

Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..
GMRULZ is offline   Reply With Quote
Old 08-11-2009, 11:50 AM   #4
shroomjohn

 
shroomjohn's Avatar
 
Drives: Golden Eagle
Join Date: Jun 2008
Location: No
Posts: 1,137
Man just wish theyd let these cars run like theyre meant to and stop trying to take away the power in these badboys
__________________
Loving this car!
shroomjohn is offline   Reply With Quote
Old 08-11-2009, 11:51 AM   #5
PQ
1st State Chevy supporter
 
PQ's Avatar
 
Drives: Hybrid SS Camaro
Join Date: Apr 2008
Location: Mobile, AL
Posts: 36,912
Send a message via Yahoo to PQ
I see your fuel/air mixturre stayed constant at a normal level during that pull. Was it the same on the other pulls?
__________________
PQ is offline   Reply With Quote
Old 08-11-2009, 11:53 AM   #6
GMRULZ

 
GMRULZ's Avatar
 
Drives: 2010 SS & 2008 C6
Join Date: Mar 2008
Location: VA
Posts: 1,825
Quote:
Originally Posted by irpq11 View Post
I see your fuel/air mixturre stayed constant at a normal level during that pull. Was it the same on the other pulls?
I beleive it was the same, I`m trying to get the graph of all 3 overlayed, but the dynoguy gave me only the best one. If and when I can get it I will post it.
__________________
2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter.

Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!

Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..
GMRULZ is offline   Reply With Quote
Old 08-11-2009, 12:03 PM   #7
PQ
1st State Chevy supporter
 
PQ's Avatar
 
Drives: Hybrid SS Camaro
Join Date: Apr 2008
Location: Mobile, AL
Posts: 36,912
Send a message via Yahoo to PQ
Quote:
Originally Posted by GMRULZ View Post
I beleive it was the same, I`m trying to get the graph of all 3 overlayed, but the dynoguy gave me only the best one. If and when I can get it I will post it.


Mine took 'the plunge' and at one point dropped off of the cart.
__________________
PQ is offline   Reply With Quote
Old 08-11-2009, 05:36 PM   #8
SGOS252382


 
SGOS252382's Avatar
 
Drives: 2010 Camaro 2SS/RS
Join Date: Mar 2008
Location: S.W. Florida
Posts: 6,279
The L99 isn't the first car to make more power (very short term) with an computer re-set.
But it doesn't take all that long for the computer to correct itself go back to stock HP levels.
__________________
SGOS252382 is offline   Reply With Quote
Old 08-11-2009, 08:17 PM   #9
GMRULZ

 
GMRULZ's Avatar
 
Drives: 2010 SS & 2008 C6
Join Date: Mar 2008
Location: VA
Posts: 1,825
Quote:
Originally Posted by SGOS252382 View Post
The L99 isn't the first car to make more power (very short term) with an computer re-set.
But it doesn't take all that long for the computer to correct itself go back to stock HP levels.
You gotthat right. It needs to be tuned out as much as possible or a dash hawk to reset it from the cabin.
__________________
2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter.

Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!

Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..
GMRULZ is offline   Reply With Quote
Old 08-11-2009, 11:04 PM   #10
Tomato
G-Force Addict
 
Tomato's Avatar
 
Drives: 2010 SS/RS A6
Join Date: Jul 2009
Location: Escalon, CA
Posts: 194
Quote:
Originally Posted by GMRULZ View Post
You gotthat right. It needs to be tuned out as much as possible or a dash hawk to reset it from the cabin.
Which fuse did you pull? I looked in my manual and found an "ECM" fuse as well as an "ECM Battery" fuse. I'm assuming the battery fuse keeps power and memory for the ECM...

Thanks!
Tomato is offline   Reply With Quote
Old 08-12-2009, 07:32 AM   #11
live2well
 
Drives: 2010 VR 2SS/RS A6
Join Date: Oct 2008
Location: Odenton, MD
Posts: 690
Quote:
Originally Posted by Tomato View Post
Which fuse did you pull? I looked in my manual and found an "ECM" fuse as well as an "ECM Battery" fuse. I'm assuming the battery fuse keeps power and memory for the ECM...

Thanks!
+1
__________________
Intelligence plus character that is the goal of true education.
BrianC. :flag2:
live2well is offline   Reply With Quote
Old 08-12-2009, 07:46 AM   #12
Andro
NOICE!!! ™
 
Andro's Avatar
 
Drives: Force Fed 427
Join Date: Jan 2009
Location: GOT BOOST?
Posts: 5,216
__________________
Andro is offline   Reply With Quote
Old 08-12-2009, 07:49 AM   #13
GMRULZ

 
GMRULZ's Avatar
 
Drives: 2010 SS & 2008 C6
Join Date: Mar 2008
Location: VA
Posts: 1,825
Quote:
Originally Posted by Tomato View Post
Which fuse did you pull? I looked in my manual and found an "ECM" fuse as well as an "ECM Battery" fuse. I'm assuming the battery fuse keeps power and memory for the ECM...

Thanks!
I pulled both of those for good measure, wasn`t sure which one would rest the ECM. I would also assume ECM battery fuse to be correct, but just to be sure I pulled both.
__________________
2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter.

Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!

Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..
GMRULZ is offline   Reply With Quote
Old 08-13-2009, 09:01 PM   #14
Tomato
G-Force Addict
 
Tomato's Avatar
 
Drives: 2010 SS/RS A6
Join Date: Jul 2009
Location: Escalon, CA
Posts: 194
Quote:
Originally Posted by GMRULZ View Post
I pulled both of those for good measure, wasn`t sure which one would rest the ECM. I would also assume ECM battery fuse to be correct, but just to be sure I pulled both.
Not to be a pain, but...You pulled your trunk apart to get to the ECM Battery fuse?

Thanks again.
Tomato is offline   Reply With Quote
Old 08-14-2009, 06:03 AM   #15
GMRULZ

 
GMRULZ's Avatar
 
Drives: 2010 SS & 2008 C6
Join Date: Mar 2008
Location: VA
Posts: 1,825
There are 2 in the fuse box that read ecm, I thought one said ecm, and the other said ecm power or ecm battery something like that, will have to go back and check. As far as pulling the main battery fuse in the trunk, I haven`t even looked at the battery yet, no I did not do that.
__________________
2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter.

Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!

Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..
GMRULZ is offline   Reply With Quote
Old 02-24-2010, 10:51 AM   #16
hamad_311
 
Drives: 2010 Victory Red Camaro 2SS/RS
Join Date: Feb 2010
Location: Bahrain
Posts: 41
so do we have to do it every month?
hamad_311 is offline   Reply With Quote
Old 02-24-2010, 11:03 AM   #17
Ghost of Vincent Price
Banned
 
Drives: 2010 Camaro
Join Date: Jan 2010
Location: underground
Posts: 374
You should be able to see where your car is losing power by logging it. You will see a timing pull most likely. Maybe TM is kicking in and thats what your seeing? The car doesnt have any real reason to reduce hp on its own. It just reads from charts and does what it says.
Ghost of Vincent Price is offline   Reply With Quote
Old 02-24-2010, 11:24 AM   #18
JANNETTYRACING
PRESIDENT CALIBRATOR JRE

 
JANNETTYRACING's Avatar
 
Drives: YELLOW 2013 ZL1 AUTO
Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 9,482
I can tell by the torque graph that your knock sensors are pulling a lot of timing that is what causes the dip in the torque curve.

Otherwise there would be No Dip.

You either have bad fuel or an early production tune where the Knock sensors were overly sensitive reducing timing and reducing power.

Any good running L99 should put down between 330-345 RWHP Stock with Premium fuel.

Ted.
__________________
Technical information, Parts Sales, Professional Installation, and Custom Dyno Tuning.
Please vist our web sites for all your performance needs!
Ted Jannetty
Jannetty Racing Ent Inc.
2984 East Main St.
Waterbury Ct. 06705
203-753-7223
tedj@jannettyracing.com
www.jannettyracing.com
www.turboaddictionparts.com
Performance Parts
JANNETTYRACING is offline   Reply With Quote
Old 02-24-2010, 12:07 PM   #19
Ghost of Vincent Price
Banned
 
Drives: 2010 Camaro
Join Date: Jan 2010
Location: underground
Posts: 374
Quote:
Originally Posted by JANNETTYRACING View Post
I can tell by the torque graph that your knock sensors are pulling a lot of timing that is what causes the dip in the torque curve.

Otherwise there would be No Dip.

You either have bad fuel or an early production tune where the Knock sensors were overly sensitive reducing timing and reducing power.

Any good running L99 should put down between 330-345 RWHP Stock with Premium fuel.

Ted.
Are you saying there was a physical difference in the knock sensors, or that the knock sensors sensitivity was just tuned differently?
Ghost of Vincent Price is offline   Reply With Quote
Old 02-24-2010, 12:15 PM   #20
JANNETTYRACING
PRESIDENT CALIBRATOR JRE

 
JANNETTYRACING's Avatar
 
Drives: YELLOW 2013 ZL1 AUTO
Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 9,482
Quote:
Originally Posted by Ghost of Vincent Price View Post
Are you saying there was a physical difference in the knock sensors, or that the knock sensors sensitivity was just tuned differently?
No physical difference, Just Tuning difference.

Ted.
__________________
Technical information, Parts Sales, Professional Installation, and Custom Dyno Tuning.
Please vist our web sites for all your performance needs!
Ted Jannetty
Jannetty Racing Ent Inc.
2984 East Main St.
Waterbury Ct. 06705
203-753-7223
tedj@jannettyracing.com
www.jannettyracing.com
www.turboaddictionparts.com
Performance Parts
JANNETTYRACING is offline   Reply With Quote
Old 02-24-2010, 12:37 PM   #21
Sherwood SS
 
Sherwood SS's Avatar
 
Drives: Black SS/RS
Join Date: Nov 2009
Location: Houston
Posts: 353
__________________
Black SS/RS - Magnaflow Comp Series, Eibach Suspension, Roto-Fab Intake
Sherwood SS is offline   Reply With Quote
Old 02-24-2010, 12:40 PM   #22
2010 SSRS



 
2010 SSRS's Avatar
 
Drives: 3 V8 Camaros
Join Date: May 2009
Location: The Ocean State
Posts: 123,973
L99
2010 SSRS is offline   Reply With Quote
Old 11-01-2011, 12:21 PM   #23
vroomapunk
[COTW 5/12/14]
 
vroomapunk's Avatar
 
Drives: 2012 CRT NF Cammed 2SS/RS
Join Date: Oct 2011
Location: New Orleans, Louisiana
Posts: 5,454
you dont have to do it every month, if I understand all that ive read on it, what happens is your computer reads that you have low octane fuel in the tank, so it compensates for that, retards timing, etc, BUT even if you put higher octane fuel in, it will not change from the low octane setting (therefore you are adding premium, but not reaping the benefits) and you car is still going to be robbed of a few HP.

This data for some reason is stored in permanent memory, not reset each time the car is turned on or off like other processes and data.

The way to reset it is to pull two fuses, therefore if when you put the fuses back in and you have high octane fuel in the tank, it will run at its best performance, and will remain in this high octane fuel "setting" for as long as you have premium in the tank.

If you ever put low octane in again, it will go back down and get "stuck" on low octane setting again and you must do a "fuse pull" to correct it.
__________________
vroomapunk is offline   Reply With Quote
Old 11-01-2011, 02:33 PM   #24
Inferno Orange 2SS-RS
US Army Retired
 
Inferno Orange 2SS-RS's Avatar
 
Drives: IOM 2SS-RS - A6 (L99)
Join Date: Aug 2009
Location: Northern Virginia
Posts: 621
Quote:
Originally Posted by vroomapunk View Post
you dont have to do it every month, if I understand all that ive read on it, what happens is your computer reads that you have low octane fuel in the tank, so it compensates for that, retards timing, etc, BUT even if you put higher octane fuel in, it will not change from the low octane setting (therefore you are adding premium, but not reaping the benefits) and you car is still going to be robbed of a few HP.

This data for some reason is stored in permanent memory, not reset each time the car is turned on or off like other processes and data.

The way to reset it is to pull two fuses, therefore if when you put the fuses back in and you have high octane fuel in the tank, it will run at its best performance, and will remain in this high octane fuel "setting" for as long as you have premium in the tank.

If you ever put low octane in again, it will go back down and get "stuck" on low octane setting again and you must do a "fuse pull" to correct it.
The way the computer determines the octane is through the knock sensors, if it detects a lot of pre-ignition the computer will start to retard timing and furl settings. With high octane gas, there should little to no pre-ignition so it stays at the higher timing tables.
__________________
SMKIN SS
2SS/RS L99, LT Headers, High Flow Cats, JRE Custom Tune, JRE Air Scoop, CAI Intake, VMAX CNC Throttle Body, Doug Thorley Catback Exhaust, RX Oil Catch Can, Racing Pedals, FR41 Wheels.

Inferno Orange 2SS-RS is offline   Reply With Quote
Old 11-01-2011, 03:34 PM   #25
axis
Search Ninja
 
axis's Avatar
 
Drives: 2010 Black 2SS/RS A6
Join Date: Oct 2009
Location: Central Ark
Posts: 7,195
What new info was provided to necro this thread?

Yall realize this thread is 18mo old.
__________________
2010 Black 2SS/RS A6
Halltech CF 102 fed
GPI modded intake manifold
Bo (knows) White ported TB
Kooks LT's/ Dynomax VT
Pfadted (springs/sways)
Dyno tuned by Rhino and GPI

I once parallel parked a train.
axis is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Headers for an L99 Automatic.....17/8 or 1 3/4 ? Jekyll-N-Hyde Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 34 08-02-2010 01:54 PM
L99 Camshaft Info HaveBlue Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 18 08-08-2009 04:43 PM
Some interesting info about LS3 testing oldfart1941 5th Gen Camaro SS LS LT General Discussions 55 07-23-2009 10:05 AM
Check your Order here bvonscott Camaro Price | Ordering | Tracking | Dealers Discussions 665 06-29-2009 01:00 PM


All times are GMT -5. The time now is 03:18 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.