irpq11, L99 Dyno results. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

PQ · 07-09-2009, 11:57 AM

Ok fellas. Here are the results from my Dyno this morning.

The tuner was particularly puzzled by the fuel mixture running so rich to abnormal levels. He seemed pretty concerned. Said it may be causing HP loss.

EDIT: Turns out he was exactly right. The fuse pull solved the problem.

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jdanza · 07-09-2009, 12:02 PM

Are the HP and torque #'s where they are supposed to be ?

9c1ny · 07-09-2009, 12:03 PM

seems to be pretty normal for the HP #'s

MTron · 07-09-2009, 12:03 PM

they do seem a touch low. Could indicated a program issue.

I think the more significant thing here, is that if there is a programming issue, it could also affect the way the transmission shifts, as well as the torque management, thus further compounding the issue

*GTAHVIT* · 07-09-2009, 12:03 PM

What else did he say??? was he happy with the HP numbers? Or did he think it was under powered?

I'm sure I should know this... but what should it be at the rear wheels?

PQ · 07-09-2009, 12:07 PM

Quote:

Originally Posted by jdanza

Are the HP and torque #'s where they are supposed to be ?

Quote:

Originally Posted by GTAHVIT

What else did he say??? was he happy with the HP numbers? Or did he think it was under powered?

I'm sure I should know this... but what should it be at the rear wheels?

He said that in his opinion, this car should be losing no more than 15% from crank to wheels. He thinks the rich fuel mixture is causing a loss. In his opinion it should be getting 330 HP to the wheels. He says this car should be tighter than that.

JDBeck23 · 07-09-2009, 12:08 PM

What caused the 20 hp jump from first to third dyno pulls?

Seems low to me, I would take the first dyno run into the dealer and put up the big WTF?!

Xanthos · 07-09-2009, 12:08 PM

They should be able 320 at the rear wheels, but that A/F ratio looks a bit weird to me as well... That could quite possibly be messing with your numbers. Of course, it could be something else as well.
- X

MTron · 07-09-2009, 12:08 PM

actually, on further inspection, those seem very wonky...

i mean run 1, the torque and hp curves are nearly idenicel.....very strange....as well the A/F graph is messed...took a major plunge at 4.5 k rpm to 10:1....NOT normal and 200lb feet of torque at 4000 rpm...i mean....wow...not normal

run 2 you A:F is low, and your torque is taking a dive, but more normal then the first

run 3, same issues as 1, A/F dive at 4k rpm torque too low for the rpm at 4000

matt55 · 07-09-2009, 12:09 PM

Wow rich in the mid , I wonder if the WBO2 is off ?

ElAntonius · 07-09-2009, 12:10 PM

They seem in line with the lower side of what most people are pulling in on the L99 (which seems to range about 310-330 depending on the dyno and other factors)

I wouldn't say that kind of dyno pull would be indicative of a car that is losing 1.5-2 seconds to 60.

Edit: I mean the actual HP numbers. Analysis of the A/F mixture and curves is beyond my ability.

1320junkie · 07-09-2009, 12:11 PM

Yeah man its a tad bit off..2nd and 3rd would be acceptable but your a/f is kinda wacked...wth happened with the 1st run?

D1BADZ · 07-09-2009, 12:13 PM

hmmm, interesting, thanks for posting this up

ElAntonius · 07-09-2009, 12:16 PM

Looking at the low starting torque on run 1, I wonder...

irpq, you've said that you randomly had the car 'wake up' the other day, though it seems intermittent?

I've been thinking about my theory that the car doesn't respond as well to mashing the throttle from the get-go...all my best launches have been in situations where I smoothly feed the throttle in and I've had some disappointing launches where I rammed it...is it possible that some aspect of the L99 software is limiting maximum torque from a dead stop? Perhaps some sort of break-in software?

07-09-2009, 11:57 AM	#1
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	irpq11, L99 Dyno results. Ok fellas. Here are the results from my Dyno this morning. The tuner was particularly puzzled by the fuel mixture running so rich to abnormal levels. He seemed pretty concerned. Said it may be causing HP loss. EDIT: Turns out he was exactly right. The fuse pull solved the problem. __________________ Last edited by PQ; 05-16-2012 at 10:26 AM.

07-09-2009, 12:02 PM	#2
jdanza Drives: 2010 2SS/RS VR-BLACK Join Date: Apr 2009 Location: Southeast Fl Posts: 392	Are the HP and torque #'s where they are supposed to be ? __________________ 2010 2SS/RS VICTORY RED / BLACK LEATHER - 6 SPEED M TRANS 6000 = Delivered To Customer-8/22/2009

07-09-2009, 12:03 PM	#3
9c1ny Drives: C6 Zed-oh-six Join Date: May 2009 Location: Buffalo NY Posts: 677	seems to be pretty normal for the HP #'s __________________

07-09-2009, 12:03 PM	#5
GTAHVIT Blessed Drives: 2013 Sonic RS MT Join Date: Dec 2007 Location: Saint Augustine FL Posts: 28,444 View My Garage	What else did he say??? was he happy with the HP numbers? Or did he think it was under powered? I'm sure I should know this... but what should it be at the rear wheels? __________________ Click image to see build thread. PQ - "the love of cars. It's a boys first step toward manhood and a mans last hold on boyhood." Fbodfather - "We do not want to use the Z28 moniker on a car that does not deserve this hallowed name." The_Blur - "Let's not confuse competitors with equals."

07-09-2009, 12:08 PM	#7
JDBeck23 Drives: 2010 Camaro, 2SS/RS Join Date: May 2009 Location: King George, Va Posts: 881	What caused the 20 hp jump from first to third dyno pulls? Seems low to me, I would take the first dyno run into the dealer and put up the big WTF?! __________________ 2010 2SS/RS CGM American Racing Headers, Magnaflow axle back, Roto-Fab CAI, Audio Integrations Sub box, Alpine Type R 10, Alpine MRP-500 amp, Pro Clips iPhone Mount

07-09-2009, 12:03 PM	#4
MTron Drives: 99 Grand Prix Join Date: Jul 2007 Location: Toronto Posts: 334	they do seem a touch low. Could indicated a program issue. I think the more significant thing here, is that if there is a programming issue, it could also affect the way the transmission shifts, as well as the torque management, thus further compounding the issue

07-09-2009, 12:08 PM	#8
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	They should be able 320 at the rear wheels, but that A/F ratio looks a bit weird to me as well... That could quite possibly be messing with your numbers. Of course, it could be something else as well. - X __________________ 2017 1LT/RS A8 Hyper Blue Metallic

07-09-2009, 12:09 PM	#10
matt55 Drives: CTS-V Join Date: Aug 2008 Location: Raleigh NC Posts: 1,069	Wow rich in the mid , I wonder if the WBO2 is off ? __________________ 10.8@130.8 610 whp, CAI, 2.5, E85, id850 on street tires.

07-09-2009, 12:10 PM	#11
ElAntonius Drives: 2010 Camaro 1SS A6 Join Date: Apr 2009 Location: Tampa, FL Posts: 140 View My Garage	They seem in line with the lower side of what most people are pulling in on the L99 (which seems to range about 310-330 depending on the dyno and other factors) I wouldn't say that kind of dyno pull would be indicative of a car that is losing 1.5-2 seconds to 60. Edit: I mean the actual HP numbers. Analysis of the A/F mixture and curves is beyond my ability. __________________ A House Divided...

07-09-2009, 12:11 PM	#12
1320junkie Drives: The Imperial Army Join Date: Feb 2009 Location: The Darkside Posts: 15,742	Yeah man its a tad bit off..2nd and 3rd would be acceptable but your a/f is kinda wacked...wth happened with the 1st run?

07-09-2009, 12:13 PM	#13
D1BADZ hmmmmm Drives: 2010 IOM in-n-out 2SS Join Date: Oct 2008 Location: San Jose, Ca Posts: 1,325 View My Garage	hmmm, interesting, thanks for posting this up __________________ "Responsibility is a Heavy Responsibilty" (Cheech)

07-09-2009, 12:16 PM	#14
ElAntonius Drives: 2010 Camaro 1SS A6 Join Date: Apr 2009 Location: Tampa, FL Posts: 140 View My Garage	Looking at the low starting torque on run 1, I wonder... irpq, you've said that you randomly had the car 'wake up' the other day, though it seems intermittent? I've been thinking about my theory that the car doesn't respond as well to mashing the throttle from the get-go...all my best launches have been in situations where I smoothly feed the throttle in and I've had some disappointing launches where I rammed it...is it possible that some aspect of the L99 software is limiting maximum torque from a dead stop? Perhaps some sort of break-in software? __________________ A House Divided...

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