ARK exhaust question - What are it's technical merits?
 

What makes the ARK exhaust superior to others?

I'm looking for solid technical answers backed by evidence, discussion, and pictures, not flames.

If you only have a comment or opinion, DO NOT post it in this thread. I will ask a staff member to delete it and issue a warning.

ARK, I'm looking at you for answers.

LMFAO at this thread

We never said our products are better. We only stated the simple facts for all of our exhaust systems.

T304 Stainless Steel Contruction
TIG Welded
Mandrel Bends
Signature Mufflers and Resonators
Welded Tips ( Various options)
X Flow chamber

We were always proud of the sound that this exhaust produced and the R&D that went into this.

http://i613.photobucket.com/albums/t...O/240a24cf.jpg

http://i613.photobucket.com/albums/t...O/f573048f.jpg

We are various Clips that utilizes the helmholtz design.
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Do you have any baseline vs. after install dyno on a same vehicle? To my knowledge, I don't ever recall seeing one from you guys on both the coupe and the sedan versions. That would be a good start to this discussion.

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We have been offering customers to pay for a cut of their bill if they provide us a full baseline vs ARK exhaust dyno. There has been some that have been done by reputable tuners.

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Let me address this point by point.

So, how would this set your exhaust apart from any other exhaust? Why would you recommend your product over a competitors product? What is the difference between your product and an ebay special that uses the same materials and construction techniques?
Okay, so it's stainless steel, we get it. How is this superior to say, Titanium grade 5?

Better is a subjective word. If you want power, larger is better, period. This is an exhaust, not a header. There is no scavenging effect, and the exhaust gas is going to cool down no matter what. Additionally, cooler air is denser, but the total mass of air going out the exhaust remains the same regardless of temperature.

No accurate way to calculate optimal exhaust diameter? How about CFD software like Flow-3D or Solidworks? This software is made EXACTLY for what you claim is impossible. Bends and kinks are static variables. Temperature fluctuations shouldn't exist on a car once the system reach equilibrium, and it can be compensated for either way.

Your marketing material keeps calling for "lowest back pressure", but that would involve a larger diameter, contrary to what it previously states. You even imply an open exhaust is best.

Awesome. Your marketing materials literally copy paste the wikipedia article for Helmholtz Resonance, located at

Helmholtz resonance - Wikipedia, the free encyclopedia
[/QUOTE]



None of this addresses my initial question. What makes the ARK superior? Why should a prospective customer buy the ARK over other options? I'm not looking for copy pasted marketing materials.

This video proves nothing. There are the following confounding variables:

-Headers
-HFCs

Additionally, none of the following is addressed (however minimal):

- Corrected numbers?
- Is this averaged runs or highest vs lowest?
- Tires presssures the same?
- Same tires?
- Fluids?
- Tune?
- Same dyno?

FWIW the 30+ whp gain shown here is the combination of Stillen headers, Stillen HFC's, Ark Exhaust, but most importantly a proper custom tune. This video proves absolutely nothing about the gains from the ARK exhaust by itself. Just sayin..

The word better is subjective. It seems like OP has his heart set on trying to nit pick at anything and everything. We used references from Wiki because it was relevant. Is that an wrong?

As for this statement..

Okay, so it's stainless steel, we get it. How is this superior to say, Titanium grade 5?
Go get a titanium grade 5 exhaust system. The raw material does a better job in retaining heat and it must lighter and durable than any SS. I thought you were trying to be constructive with this thread

Better is a subjective word. If you want power, larger is better, period. This is an exhaust, not a header. There is no scavenging effect, and the exhaust gas is going to cool down no matter what. Additionally, cooler air is denser, but the total mass of air going out the exhaust remains the same regardless of temperature.

Larger is not better. Period. Please back up your statement and try not to confuse the people that larger piping will always produce more power. I have mine ready.

No accurate way to calculate optimal exhaust diameter? How about CFD software like Flow-3D or Solidworks? This software is made EXACTLY for what you claim is impossible. Bends and kinks are static variables. Temperature fluctuations shouldn't exist on a car once the system reach equilibrium, and it can be compensated for either way.

Even today, there is no accurate way of calculating exactly which piping size nets the most power unless you have access to Infiniti or any OEM exhaust department(Im simply pointing this out because nothing is impossible, as long as you have the resources to do it((A LOT OF MONEY)). For all aftermarket exhaust manufacturers .It comes down to educated trial and error. There is simply way too many variables to consider when deciding on piping diameter for specific engines. Also in reference to what you said above regarding piping size, why don't we all go 4" piping? It would produce the most power right?

Your marketing material keeps calling for "lowest back pressure", but that would involve a larger diameter, contrary to what it previously states. You even imply an open exhaust is best.

When making an exhaust, we do not try to eliminate backpressure. We want to come up with the best piping size so that gases stay hot throughout the entire exhaust system. Hot gases are lighter therefore it travels faster than cold denser air. Backpressure is needed in all exhaust systems to perform well in any condition.

All I know is that ark sounds sick. And as everyone knows bolt on parts for our cars do minimal.

You need to get your facts straight. Titanium is heavier than steel for a given volume of metal. Ti is, however, stronger, so a thinner material can be used, allowing for the net weight of a system to be lighter. Were the same thickness of material used, Ti would be heavier.

In terms of thermal conductivity, they are roughly similar, dependent on the grade of materiel used. I said if you want power, larger is better. Period. Try blowing out a coffee stirrer. Then blow out a straw. Then blow out a mcdonalds straw. Then blow out a boba straw. Which one moved the most volume with the least effort?

As long as the exhaust is the restriction in the system, larger is better.
I'm sure a reputable company of your size can afford a SINGLE solidworks license. That's all you need to confirm your results.

If money is that tight, try this. It's free.

Wind-US: Free CFD Analysis Software from the NPARC Alliance

We don't all go 4" piping because it would be insanely loud, and the diminishing returns on power gain for material cost increase is not worth it for most applications.
Hot gasses are less dense. The total mass of the air being moved does not change I've stated this before.

Backpressure is not necessary to perform well in any condition. I will bet you money that any consumer car engine in production will have higher output with a open header than with an exhaust that restricts its flow. The scavenging effect is used to decrease resistance to flow. Diameter is increased to promote flow.

How about it? We put this to the test, and loser pays for the cost of testing?

I have nothing more to add to this. Do your test, you will lose low end torque but probably yield gains at the top end.

Thank you for your interest in our products. We hope that one day you will be able to appreciate the option that we have provided you for your vehicle. If you are not satisfied with our products please email me directly at alex@arkperformanceusa.com or call me directly if you have any questions. 909.391.1275.

Hey MIKE; did you do ask these same questions to every company that makes exhaust for the G?
ARK FTW IMO.
My nuts hang low like my ARK Exhaust.

I ask these types of questions anytime I consider purchasing ANY product.

If a company is going to make strong claims, then yes, I will ask them the same questions. Why should I buy THEIR product instead of someone else's.

A mediocre rep will bash others.

A highly educated and trained rep will be able to give you pros and cons of your available options.