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

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Old 08-18-2009, 10:31 AM   #1
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DYNO, INSTALL, DYNO, TUNE, DYNO

Hey guys I thought you would enjoy this info.

We are doing an install of ARE headers W/C and Maganaflow axle back then dyno tune using HP Tuners.

We just baselined the car 5 pulls averaged for 370 RWHP and 370 RWTQ. with a best pull of 375 RWHP and 375 RWTQ and a hot soaked 360 RWHP and 360 RWTQ.

We will install the exhaust systems then dyno again untuned then tune it and dyno again and post the results.

We are video recording the highlights and will post a video in the next few days after we edit footage to keep it to down to the important stuff.

Ted.
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Old 08-18-2009, 10:45 AM   #2
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sounds good!
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Old 08-18-2009, 10:45 AM   #3
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Cant' wait to see the results!
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Old 08-18-2009, 04:50 PM   #4
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Here is a tease to hold you over till I can sit down and crunch the numbers, Still Working on the Tune there are a few more ponies hidden in there.LOL
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Old 08-19-2009, 10:57 AM   #5
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The Real Results No padding here

Starting with a fully warmed up engine strapped to the Superflow Chassis dyno, we did 5 pulls for each combination, took our average from each group and compared RWHP and RWTQ.

The American Racing headers W/Cs coupled to the Magnaflow Axle back system requires 2 stainless 2 1/2 inch pipes to connect the 2 systems 1-9 inches and 1-4.5 inches long along with some carefull twisting and aligning it all worked pretty well.

This provided an honest and solid repeatable 28 RWHP and 25 RWTQ.

A tune without being overly agressive with timing, keeping Knock retard to under 1 degree, cleaned up the air fuel ratio to a flat 12.5:1 again safe, worked with the torque management, turned off Skip shift, raised speed limiter, lowered fan turn on temps.

Netted us another honest solid and repeatable 9 HP and 12 RWTQ for a total gain of 37 RWHP and 37 RWTQ.

Total numbers were 410 RWHP 407 RWTQ.

I realize these numbers are lower than advertised but I assure you they are accurate and repeatable.

Engine oil temp plays a major roll in the power to the wheels so if your not paying attention you can easliy show the lowest numbers against the highest numbers.

This is the main reason we do 5 pulls for each combination.

We also pulled the air filter from the stock air box and made 1 HP and 1 TQ, so I will be curious to see if the cold air system really make what they advertise.

The most impressive thing is how this car drives with the torque managment adjusted, Throttle Response is Amazing, Feels more like 50 HP from the Seat O Pants Meter.

Ted.
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Last edited by JANNETTYRACING; 08-21-2009 at 07:05 AM.
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Old 08-20-2009, 04:02 PM   #6
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Penny for your thoughts?
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Old 08-20-2009, 04:56 PM   #7
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You said you needed (2) 1.5" pipes to connect the AR Headers system to the axle back system. Why 1.5", wouldnt that be a restriction in an exhaust that is 2.5"?
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Old 08-21-2009, 07:05 AM   #8
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You said you needed (2) 1.5" pipes to connect the AR Headers system to the axle back system. Why 1.5", wouldnt that be a restriction in an exhaust that is 2.5"?
Typo, Sorry, Edited.
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Old 08-21-2009, 10:17 AM   #9
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Yea I figured it was just a typo but had to ask. Numbers look pretty good, about 40 hp with bolt ons is not bad. I was curious exactly what the torque management on the LS3 is doing and how much of it there is? Does it have a noticeable impact on acceleration by adjusting it?
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Old 08-21-2009, 10:37 AM   #10
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Nice and honest...

Vengeance did something similar when they were building mine and the ARH netted 28.69RWHP 23.58RWTQ.

You can see additional info in my build thread....

So...between you and them...I think we have a pretty honest answer. Mine was done in Atlanta in the summer, so it was hot and humid...but, then...so was the baseline
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Old 08-21-2009, 11:02 AM   #11
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Quote:
Originally Posted by CDBiker220 View Post
Yea I figured it was just a typo but had to ask. Numbers look pretty good, about 40 hp with bolt ons is not bad. I was curious exactly what the torque management on the LS3 is doing and how much of it there is? Does it have a noticeable impact on acceleration by adjusting it?
The torque managament is the single biggest difference in the street performance.

When I adjust it, the engine gets to full throttle quicker which makes if feel like 50 hp.

Torque management does not show up on the dyno it shows up on the street.

Ted.
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Old 08-29-2009, 08:46 AM   #12
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Bump for new members to see.
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Old 08-29-2009, 11:26 AM   #13
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Base numbers look at bit high...was this done on the dyno with a load? Or just sitting on top of the dyno? What was the weather conditions on baseline? Thanks for additional information.
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Old 08-29-2009, 11:46 AM   #14
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Quote:
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Base numbers look at bit high...was this done on the dyno with a load? Or just sitting on top of the dyno? What was the weather conditions on baseline? Thanks for additional information.
With a Superflow Dyno with or without a load makes no difference, because it measures torque at the wheel.

The only difference is how long the RPM Sweep takes, Tested this hundreds of times.

Baseline and finish were done same day 90 degrees throughout the day.

The car was fully broken in and fully warmed up oil temps were held consistant.

These cars gain 10 hp just getting the oil up to temp.

Ted.
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Old 08-29-2009, 12:17 PM   #15
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These numbers are all impressive and clearly there's a lot more headroom on these cars for "average-joe" improvements to the performance than most would expect. I definitely am looking for "seat of the pants" torque.

The more I read through these Dyno threads, the more I learn... Thanks to all the tuners on Camaro5 for sharing...
I just found my "Dyno-Guy" less than 2 miles from my house. It was a little unnerving walking into his garage with no less than seven 'Stangs all lying around in various stages of MODS. When I asked the guy if he'd be interested in working on my 2010 SS, he perked up pretty quick... I'll be sure to mention all the tweaks I've read about from all of the good people working up the best possible setups on our Camaro's
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Old 11-15-2009, 10:34 AM   #16
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To the top for those who have not seen this, Lots of new members here.

Thanks for looking.
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Old 11-16-2009, 04:26 PM   #17
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Very cool. You plan on doing this with other vendors' headers (perhaps similar to the CAI thread) or was this because you had made the decision to go with these headers?

While I have your attention, if it's not too noobish, can you comment on the fundamental difference in long tube vs short tube headers (besides the length) and what should be considered when making the decision?
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Old 11-17-2009, 07:01 AM   #18
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Very cool. You plan on doing this with other vendors' headers (perhaps similar to the CAI thread) or was this because you had made the decision to go with these headers?

While I have your attention, if it's not too noobish, can you comment on the fundamental difference in long tube vs short tube headers (besides the length) and what should be considered when making the decision?
I would like to put together a Header shoot out, but it is not as easy as a CAI test.

The Customer had chose the Headers in this case, We were impressed with the fit and finish as well as the performance.

In my Experience a Shorty Header is only Marginally better than the manifold and sometimes not worth the money for the minimal gain if any.

A long tube header promotes air flow through the engine by Scavaging the old burned mixture from the cylinder more effectively.

Kind Of like having a Vacuum on each exhaust port when the valve opens.

Ted.
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Old 11-17-2009, 07:51 AM   #19
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Quote:
Originally Posted by JANNETTYRACING View Post
I would like to put together a Header shoot out, but it is not as easy as a CAI test.

The Customer had chose the Headers in this case, We were impressed with the fit and finish as well as the performance.

In my Experience a Shorty Header is only Marginally better than the manifold and sometimes not worth the money for the minimal gain if any.

A long tube header promotes air flow through the engine by Scavaging the old burned mixture from the cylinder more effectively.

Kind Of like having a Vacuum on each exhaust port when the valve opens.

Ted.
Good test and consistent, we find the same with most short tubes, not really worth the money, long tubes seem to work much better in every case we have tested. Good JOB
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Old 11-17-2009, 07:56 AM   #20
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this is great info! thanks Ted.
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Old 11-17-2009, 05:11 PM   #21
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Absolutely, and thanks for the clarification there.
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