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

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Old 09-05-2009, 04:19 PM   #26
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Quote:
Originally Posted by thebrainhart View Post
Just dyno'd mine tonight, complete stock to the filter, 1050 miles, easy first 450, then having fun. Pulled fuses at about 600 miles.

About 85 degrees, first run 321hp, 336tq. Second run (about 1 minute idling rest) 313hp, 319tq

Your torque takes a major nose dive around 3500 rpms?
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Old 09-10-2009, 12:23 PM   #27
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how can so many stock L99s have some any different readings? i mean i know temp humidty things of that nature affect it, but i didnt realize it was that much...
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Old 09-17-2009, 04:28 PM   #28
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You have to remember that there are Mustang Dyno's which add a load to the drums where the rear wheels are turning and the load is based on the weight and Co efficient drag of the car being tested. A dyno jet doesn't really have that kind of load and is calibrated differently. Just remember that not all dyno's are the same. Just use it to get your tuning down and take it to the TRACK!!
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Old 09-18-2009, 12:12 AM   #29
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just got dyno'd few hours ago. 312hp.
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Old 09-23-2009, 11:05 AM   #30
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On a Dynojet dyno to compare numbers use the "SAE" correction factor. This accounts for the DA= density altitude, and all other atmospheric conditions correcting to sea level putting everyone on as close to the same playing field as possible.

The "STD" correction factor will give you a slighty higher number which is nice to look at but not correct, kinda a best case scenario.

If want to know what your car is making on that specific day on that specific dyno use NO corretion factor. This will most likely drop you number a good amount but it is what is actually produced on car "x" on dyno "x" with whatever the air is that day, on that dyno.


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Old 09-25-2009, 07:40 PM   #31
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I have my dyno results here. The first test was with a Roto Fab CAI. The second was with the CAI and Magna Flow 3" cat back system.

Best of each of 3 pulls gained 7 hp and and 6.44 ft lbs of torque. The lowest CAI only pull to the highest CAI/exhaust pull gained 12.44 hp and 17 ft lbs of torque.


Lowest to Best Comparison
CAI CAI+EXH
Tq 341.75 359.44
HP 337.06 349.50


Best to Best Comparison
CAI CAI+EXH
Tq 353.0 359.44
HP 342.44 349.50
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Last edited by ttss; 09-25-2009 at 08:04 PM. Reason: adding pics
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Old 09-25-2009, 10:20 PM   #32
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Quote:
Originally Posted by thebrainhart View Post
Just dyno'd mine tonight, complete stock to the filter, 1050 miles, easy first 450, then having fun. Pulled fuses at about 600 miles.

About 85 degrees, first run 321hp, 336tq. Second run (about 1 minute idling rest) 313hp, 319tq
Is it just me, or does this torque curve seem kind of shakey?
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Old 09-25-2009, 10:25 PM   #33
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By the AFR Im guessing this is untuned. Still great numbers though.
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Old 09-25-2009, 10:33 PM   #34
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I did not mention the first pulls were a week ago at about 1100 miles and the pulls today were at 1226 miles. Both times the car was already hot after a 20 minute drive to the shop. The car has not been tuned yet. Still debating the loss of warranty idea.
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Old 09-25-2009, 10:48 PM   #35
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Getting a tune was well worth the money and loss of warranty to me. I dont think you will ever experience problems with a stock internal ls motor. Plus the trans tune alone made it feel like a different car.
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Old 09-26-2009, 12:58 AM   #36
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My latest Dyno below... results are entirely thanks to ADM Performance. No one else will ever work on my car, and if they don't make the mod then my car doesn't need it. Andy has my L99 running some incredible times and numbers.

NOTE: The earlier run was my car as GM sent it to me... that is to say, before any efforting by ADM Performance... about 3 months ago. The second run was today.

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Old 09-28-2009, 10:48 AM   #37
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Very nice numbers! Any other mods or just a tune?
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Old 09-28-2009, 11:18 AM   #38
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Very nice numbers! Any other mods or just a tune?
My current setup:

ADM Race Intake
ADM Intense performance tune
ADM Performance quite custom 2.5" exhaust
ARH Stainless 1 7/8 headers

Making 360 rwhp and 378tq. Now running the 1/8th mile in 8.289 @ 87.23mph.
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Old 09-29-2009, 09:06 PM   #39
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2010 SS L99 Dyno results

First pic is dyno results on car 100% stock. 1300 miles on car.
Broke in by routine city/highway driving with multiple hard accelerations every outing running car up to 85 - 90 mph and letting it coast down to 35- 45
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Old 09-29-2009, 09:14 PM   #40
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2010 SS L99 Dyno results after mods

Installed Kooks LTH with Hi flow cats and a Corsa catback exhaust and a tune.
Straightline Performance did all the work and the tune. Dyno results after this work.
I can't say enough good things about the experience of dealing with Mike and Nick and the rest of the crew. Answered all my questions, explained everything in detail and then some. They clearly have a passion for their work, are unbelievably knowledgeable.
If you are considering work/tuning I would definitely give them a call if you are in the Chi-town area
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Old 09-29-2009, 09:19 PM   #41
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2010 SS L99 Dyno results before and after graph

Here is the graph of before and after.
Coming up shortly is a Vararam intake and a final tune
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Old 09-30-2009, 07:08 AM   #42
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Originally Posted by DGthe3 View Post
Because despite what Top Gear tried to promote in their dyno test of a GT500, the number that is advertised is not the same as what you will be testing when you strap it down for a dyno run. GM and every single other automaker out there rates their engines with an engine dyno. This is a test rig that measures the output of the engine. A chassis dyno, which is what you most often see, measures the power at the wheels. This is the power at the crank minus any losses from the drivetrain.
I'm realy wondering how the Camaro can lose about 90 rwhp trough the drivetrain. This seems not to be realistic.

A realistic value in a RWD would be 25 for the manual and 40 for the automat.

That means 340 - 370 rwhp corrected enginge power for the auto and 370 - 400 rwhp corrected enginge power for the manual.




Same as with our Chryslers we had on several German Dynos! In most cases was the engine power > 10 % less manufactures data.
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Old 09-30-2009, 10:10 AM   #43
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...A realistic value in a RWD would be 25 for the manual and 40 for the automat....
I have always heard that a 20% loss to the drivetrain is more in line? So, about 80HP loss on the automatic, with a sightly larger number for the manual?
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Old 10-01-2009, 03:53 PM   #44
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HP loss to rear wheels.

Quote:
Originally Posted by Luttinger View Post
I'm realy wondering how the Camaro can lose about 90 rwhp trough the drivetrain. This seems not to be realistic.

A realistic value in a RWD would be 25 for the manual and 40 for the automat.

That means 340 - 370 rwhp corrected enginge power for the auto and 370 - 400 rwhp corrected enginge power for the manual.




Same as with our Chryslers we had on several German Dynos! In most cases was the engine power > 10 % less manufactures data.
I have been "running" chevy's for years and the "average" so called loss of HP is usually between 15-20% through the drivetrain to the rear tires due to torque convertor and everything else down the drive line. The stick shift actully is a little less than and automatic.
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Old 10-10-2009, 06:08 AM   #45
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Im debating right now on ordering LS3 or L99 in my car. After all this and you guys having your LS99 for awhile.... any regrets?

Please advise!!!!
Thanks
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Old 10-10-2009, 10:22 AM   #46
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DYNO 10-3 344HP 363TRQ STOCK

So here's my DYNO. The only MOD to the car is the SLP LM II Axle Back Exhaust. I'm pretty impressed and so was the guy doing the DYNO who happens to only work on Mustangs. He said that it was running very rich and a CAI along with a TUNE would probably add close to 40 RWHP easily. I'm holding off on the TUNE, but the CAI (once the JannettyRacing test comes back with results) will be my next MOD.



Saturday, Oct 3rd. Temp 77', Humidity 38%.

Three runs: 1100 Miles, 2 Oil changes so far.

TIME - 10:34A BLUE Line Max Power = 337.04 Max Torque = 355.64

TIME - 10:59 RED Line Max Power = 344.88 Max Torque = 363.54

TIME - 11:08A GREEN Line Max Power = 344.14 Max Torque = 362.99
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Old 10-16-2009, 11:05 AM   #47
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Had ADM do my CAI, and tune yesterday. Previously was stock except for the street demon exhausts. Pretty inpressive results I think!

Andy did a great job and has another satisfied customer!
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Old 10-16-2009, 11:23 AM   #48
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Had ADM do my CAI, and tune yesterday. Previously was stock except for the street demon exhausts. Pretty inpressive results I think!

Andy did a great job and has another satisfied customer!
I agree!
Any other work planned?
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Old 10-16-2009, 11:57 AM   #49
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Waiting

Quote:
Originally Posted by Capstone View Post
So here's my DYNO. The only MOD to the car is the SLP LM II Axle Back Exhaust. I'm pretty impressed and so was the guy doing the DYNO who happens to only work on Mustangs. He said that it was running very rich and a CAI along with a TUNE would probably add close to 40 RWHP easily. I'm holding off on the TUNE, but the CAI (once the JannettyRacing test comes back with results) will be my next MOD.



Saturday, Oct 3rd. Temp 77', Humidity 38%.

Three runs: 1100 Miles, 2 Oil changes so far.

TIME - 10:34A BLUE Line Max Power = 337.04 Max Torque = 355.64

TIME - 10:59 RED Line Max Power = 344.88 Max Torque = 363.54

TIME - 11:08A GREEN Line Max Power = 344.14 Max Torque = 362.99
It looks like everyone is waiting for this test result to buy. Somebody is going to make a lot of money and have a lot of orders to fill!
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Old 10-16-2009, 01:08 PM   #50
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Naw, probably nothing performance wise. This is my everyday driver, and it is plenty fast enough for me right now. Maybe just a little more bling later.
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