Engine Dyno Testing Major Headers Very Soon!!! :)
Burning Brakes
Joined: Nov 2012
Posts: 968
Likes: 8
Do you all think that it is reasonable to generalize from the info you all will be putting up, from cars with a cam, or ?, and the header tests, to a 'base' engine and how that engine would benefit from that same set of headers?
Some headers would benefit better from a cam, based upon design, and therefore have a designed in improvement over the others, or headers, in general, will benefit the engine/power, and we can consider the cam influence issue largely irrelevant to the testing in general?
Hope I put that question clearly.
Some headers would benefit better from a cam, based upon design, and therefore have a designed in improvement over the others, or headers, in general, will benefit the engine/power, and we can consider the cam influence issue largely irrelevant to the testing in general?
Hope I put that question clearly.
Last edited by J Christensen; Dec 7, 2013 at 11:34 AM.
Premium Supporting Vendor
Joined: Nov 2005
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From: Amityville ny 631-608-1986
Silverdevil, Thanks for sharing your experience and I appreciate you choosing ARH. 
Once again the ARH Mid Lengths prove they are amazing UNTUNED and even better with a tune.
To remind everyone, tuning with our Mids is not a necessity. Their main purpose is provide an option for those that do not want to deal with tuning and have only mild bolt on upgrades in mind. We clearly see what adding a tune can do but even without and running thru 4 cats, these headers really perform.
With heads/cam upgrades it's ARH long tubes all the way.
Nick
Once again the ARH Mid Lengths prove they are amazing UNTUNED and even better with a tune. To remind everyone, tuning with our Mids is not a necessity. Their main purpose is provide an option for those that do not want to deal with tuning and have only mild bolt on upgrades in mind. We clearly see what adding a tune can do but even without and running thru 4 cats, these headers really perform.
With heads/cam upgrades it's ARH long tubes all the way.
Nick
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
Impressive results untuned, especially considering 4 cats. Very impressive results tuned with 4 cats. Looking forward to seeing the ARH LT's results untuned and tuned.
Nick, what is the price of the mid-length system and the price of the long tube system with cats?
These comparisons are a first on the Corvette Forum (as far as I know) and hopefully set a standard for manufacturers, tuners and installers to validate claims. In the big picture it's my opinion that the buyer will receive a qualified return on their investment and top shelf manufacturers will have an opportunity to validate their R&D, expertise and commitment to excellence. A win-win for manufacturer and consumer.
Pro
Joined: Apr 2013
Posts: 602
Likes: 58
From: Detroit area and Nashville area What day is it? Between MI & TN
I've read the 6 pages of posts...
wow, some folks don't seem to have a problem complaining about free, detailed, information which seems to be targeted at assisting them in making a better informed decision, aside from advertising claims, while helping them see what true support they are getting from forum vendors.
Appreciate your willingness to continue down this path and the spirit in which it seems many other forum vendors / products are supporting this initial intent and outcome benefiting forum members in a professional manner.
wow, some folks don't seem to have a problem complaining about free, detailed, information which seems to be targeted at assisting them in making a better informed decision, aside from advertising claims, while helping them see what true support they are getting from forum vendors.
Appreciate your willingness to continue down this path and the spirit in which it seems many other forum vendors / products are supporting this initial intent and outcome benefiting forum members in a professional manner.
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
In the posts above by Ron and Vengeance Racing on a chassis dyno it is shown that the ARH Mid Length headers along with their 2 hi-flo cats and the two factory cats demonstrated untuned gains of 15.3rwhp and 28.1rwtq. With tune the same Mid Length headers demonstrated a gain of 34.5rwtq and 41.1rwtq. Quite amazing.
As I understand a DYNO header has fewer physical demands such as "fitment" so it would seem that in a dyno cell with controlled environment and metrics (oil temp, fluid temp, parasitic loss, DA, IAT, etc..) measuring BHP/BTQ rather than RWHP/RWTQ a DYNO HEADER WOULD ALWAYS YIELD BEST GAINS because of less or zero compromises. I saw these early threads claiming 40-50 rwhp/40-50rwtq gains WITHOUT A TUNE. To me, those were very hard to take seriously and my gut instinct was inflated numbers (especially without tune).
Are DYNO headers designed to be optimized for any certain criteria? It seems the ARH mid lengths are superior in design at least to optimize results with oem tune?
Burning Brakes
Joined: Nov 2012
Posts: 968
Likes: 8
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Burning Brakes
Joined: Nov 2012
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Would the (OEM) car you reference, just having a tune, no headers, realize 'about' 19'ish (rough) HP over the OEM mapping?
That's how my thinking is going.
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
A Halltech CAI and a street/dyno tune from an experienced tuner would be money well spent and my first choice if I'm going to forgo my factory 100k powertrain warranty and spend money on performance improvement.
Supporting Vendor
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From: Bristol, Tennessee
St. Jude Donor '09
The "tune only" cars dyno graphs I have seen posted on the Corvette Forum have shown 19+ on both torque and horsepower. Side benefits would likely include increased off idle throttle response and increased midrange. On automatics you would likely see crisper shifts, higher rpm shift points and better overall transmission response. I cannot give qualified answer because I do not own a C7 but my experience with my tuned 2011 Chevy Silverado 6.2 was a much improved overall driving experience.
A Halltech CAI and a street/dyno tune from an experienced tuner would be money well spent and my first choice if I'm going to forgo my factory 100k powertrain warranty and spend money on performance improvement.
A Halltech CAI and a street/dyno tune from an experienced tuner would be money well spent and my first choice if I'm going to forgo my factory 100k powertrain warranty and spend money on performance improvement.
Folks looking to mod with just our intake, will find that the warranty will not be affected at all. In 15 years we have never had one of our CAIs cause a warranty loss.
I would agree with you completely, that the intake/tune will be a real winner. We still have that aspect to look forward to, as all of our efforts have been set around the stock tune, with over 1700 miles clocked with our intake onboard. The last stage is our fully enclosed airbox. This is just the mock up buck for the new mold:
__________________
"World Class Performance for your Corvette"
Intake Design and Engineering since 1999
Halltech Systems, LLC
423-915-6056
For service email:
orders@halltechsystems.com
www.halltechsystems.com
"World Class Performance for your Corvette"
Intake Design and Engineering since 1999
Halltech Systems, LLC
423-915-6056
For service email:
orders@halltechsystems.com
www.halltechsystems.com
Premium Supporting Vendor
Joined: Oct 2005
Posts: 13,975
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From: Clinton Township MI
C7 of Year Finalist (track prepared) 2019
http://forums.corvetteforum.com/c7-z...f-the-lt4.html
Exhaust manifolds look identical. I would venture to say that they are the same part number.
