SGOS's - L99 A6 Dyno results (after dyno tune) - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

rodimus prime · 07-25-2009, 06:01 PM

There is a difference between a safe tune and a power robbing tune.

silverfox · 07-25-2009, 06:14 PM

OK guys i'm having a procharger sc and arh full system but keeping the stock mufflers installed at dtp racing next week. I will post dyno charts and numbers after.

SGOS252382 · 07-25-2009, 06:25 PM

Quote:

Originally Posted by Verio

Is there a reason these cars run so rich? What is the benefit? I know GM Engineers probably have their reasoning...but 70 HP lower than at the fly wheel because of such a rich A/F ratio bothers me.

You should try 95hp lower. Lots of guys are dynoing in the
305 rwhp range. If you get an L99 that's dynoing around 320 rwhp, you should consider yourself lucky. Around 320 - 330 rwhp is where a 400hp automatic should be dynoing.

Automatics (hp) are usually calculated at a .20 loss.

SGOS252382 · 07-25-2009, 06:29 PM

Quote:

Originally Posted by silverfox

OK guys i'm having a procharger sc and arh full system but keeping the stock mufflers installed at dtp racing next week. I will post dyno charts and numbers after.

It should make a ton of power. Jeremy said with just exhaust and tuning I'd probably see 50hp.

And Prochargers make big HP.

camaro5 · 07-25-2009, 06:34 PM

AFR
The Air fuel ratio is the most common reference term used for mixtures in internal combustion engines. It is the ratio between the mass of air and the mass of fuel in the fuel-air mix at any given moment.

For pure octaneOctane
Octane is a straight-chain alkane with the chemical formula CH36CH3.Octane has 18 structural isomers:* Octane ...
the stoichiometric mixture is approximately 14.7:1 or of 1.00 exactly.

In Naturally Aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 - 13.3:1 or of 0.85 - 0.901.

bobby35ny · 07-25-2009, 06:55 PM

FYI, Disclaimer of course.

They make undetectable tunes ya know.

-bobby

69Bird · 07-25-2009, 07:37 PM

It just doesnt make sense that GM would do this.
#1. killing power.
#2. wasting fuel/fuel economy. (not to mention emmisions being higher)
They have to know it's a jacked up tune, they need to fix it so people with the A6 can keep their warranties intact.

Just my .02 cents

1camaro70 · 07-25-2009, 09:01 PM

also Brian Herter, pcmforless.com, I know he travels, L99 327 HP, 342 Torque up from 305/300.
HP was as high as 332 on last run, but torque was a little lower.
Air fuel stock was 11 to 1, tuned 13 to 1.

rpepka · 07-25-2009, 09:33 PM

It sounds like GM needs to reflash most all of the L99 computers

redjewel · 07-25-2009, 09:55 PM

Quote:

Originally Posted by rpepka

It sounds like GM needs to reflash most all of the L99 computers

I might be interested in an undectable tune though. I just don't know how true they are to undetectable.

PQ · 07-26-2009, 12:23 AM

Quote:

Originally Posted by bobby35ny

FYI, Disclaimer of course.

They make undetectable tunes ya know.

-bobby

bobby35ny · 07-26-2009, 01:05 AM

Quote:

Originally Posted by irpq11

Why would I lie? They have them!!

-bobby

*mlee* · 07-26-2009, 01:06 AM

Quote:

Originally Posted by CamaroSpike23

its safer to run a car too rich than to run it too lean. id like to see a stock L99 with a CAI's dyno sheet... just to check some things.

I'm going to have mine done Aug 8th at LMR. Although I do have catback as well as CAI

PQ · 07-26-2009, 04:19 AM

Quote:

Originally Posted by bobby35ny

Why would I lie? They have them!!

-bobby

Didn't say YOU lied. But perhaps someone lied to you. I wouldn't trust it. If it's true, I wouldn't be so sure of the tune.

07-25-2009, 06:34 PM	#19
camaro5 Drives: X-15 Velocipede Join Date: Mar 2008 Location: SW Florida Posts: 4,630	AFR The Air fuel ratio is the most common reference term used for mixtures in internal combustion engines. It is the ratio between the mass of air and the mass of fuel in the fuel-air mix at any given moment. For pure octaneOctane Octane is a straight-chain alkane with the chemical formula CH36CH3.Octane has 18 structural isomers:* Octane ... the stoichiometric mixture is approximately 14.7:1 or of 1.00 exactly. In Naturally Aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 - 13.3:1 or of 0.85 - 0.901. __________________ 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.

07-25-2009, 06:55 PM	#20
bobby35ny Drives: 18 ZL1 A10 Join Date: Nov 2008 Location: South East, FL Posts: 3,023	FYI, Disclaimer of course. They make undetectable tunes ya know. -bobby __________________ 2017 ZL1 M6 Bog City, 2013 ZL1 M6, 2010 2SS M6 ZL1::J-E-T-S JETS JETS JETS

07-25-2009, 07:37 PM	#21
69Bird Drives: 1969 Firebird, 2010 Camaro SS Join Date: Jul 2009 Location: Spring Lake NC Posts: 226	It just doesnt make sense that GM would do this. #1. killing power. #2. wasting fuel/fuel economy. (not to mention emmisions being higher) They have to know it's a jacked up tune, they need to fix it so people with the A6 can keep their warranties intact. Just my .02 cents __________________ 2SS RS CGM LS3, 11.97@119mph with Pirelli lined fender wells

07-25-2009, 09:01 PM	#22
1camaro70 Drives: 2010 2SS RS L99 Join Date: Oct 2008 Location: BUTLER, PA Posts: 531	also Brian Herter, pcmforless.com, I know he travels, L99 327 HP, 342 Torque up from 305/300. HP was as high as 332 on last run, but torque was a little lower. Air fuel stock was 11 to 1, tuned 13 to 1. Last edited by 1camaro70; 07-25-2009 at 09:46 PM.

07-25-2009, 09:33 PM	#23
rpepka Drives: 2013 ZL1 # 2195 Join Date: Jun 2009 Location: Bradenton, FL Posts: 965	It sounds like GM needs to reflash most all of the L99 computers __________________ http://www.sarasotahomestore.com/

07-25-2009, 06:01 PM	#15
rodimus prime Account Suspended Drives: Cargo van. Join Date: Jul 2009 Location: Metal Metal Land Posts: 1,247	There is a difference between a safe tune and a power robbing tune.

07-25-2009, 06:14 PM	#16
silverfox Drives: 2010 camaro ss Join Date: Jun 2009 Location: portsmouth,va. Posts: 502 View My Garage	OK guys i'm having a procharger sc and arh full system but keeping the stock mufflers installed at dtp racing next week. I will post dyno charts and numbers after.

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