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V8 Engine Discussion 6.2L LS3/L99 V8 | Exhaust | Ignition | Induction | Intakes

Thread: Introducing the JacFab CAI system! Dyno numbers and video inside... Reply to Thread
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  Topic Review (Newest First)
07-14-2013 09:32 PM
Originally Posted by sdmbdad71 View Post
+1, I would be down for a test run.
I'm not even joking. I'm ready to start doing stuff to this car ASAP. Of course, furlough has caught me now, so I'm kinda cut back for a few months...
07-14-2013 07:34 PM
Originally Posted by coyotekiller View Post
Once you get the production model made up you could send me one to test and iron out the wrinkles. You know, like a production trial run on another camaro other than your own lol.
+1, I would be down for a test run.
05-26-2013 06:05 PM
Originally Posted by RacnJsn95 View Post
Just watch and wait like everyone else Still no idea on a time frame to public sales.
Once you get the production model made up you could send me one to test and iron out the wrinkles. You know, like a production trial run on another camaro other than your own lol.
05-26-2013 05:21 PM
Originally Posted by coyotekiller View Post
Where do I sign up to get myself one?
Just watch and wait like everyone else Still no idea on a time frame to public sales.
05-25-2013 06:53 PM
coyotekiller Where do I sign up to get myself one?
05-25-2013 01:49 PM
Originally Posted by coyotekiller View Post
So the "cold rush" is having trouble with heat soak despite having a silicone intake tube? Or did the intake tested not have this feature? And if the tube isn't hot to the touch, where would you be getting these heat problems from? The box?
The Cold Rush intake tested in this instance did not have the silicone insulation in the redesigned larger box as the mold for the insulation for the new box has not yet been completed. The numbers previously reported were hand written by the dyno operator as the printer was not working. Some were STD correction, and some were SAE, which shouldn't be compared directly. See below for more accurate ALL SAE corrected testing numbers.

So back to the most recent test... The numbers the dyno operator wrote down on paper were all mixed up, some were standard correction numbers, some were SAE, and some HP numbers were even transposed from the TQ numbers... I finally received the dyno run files and was able to look at them myself and make sure everything was right. Please disregard the previous numbers, and for those just catching up, I have already gone back and erased the previously posted numbers. All numbers shown in the following dyno graph are SAE corrected.

Runs #1 and #2 are the JF Cold Rush "Cold runs" then "Hot Runs", runs #3 and #4 are Brand X "Cold" then "Hot", and runs #5 and #6 are the stock airbox with stock filter "Cold" then "Hot"... 22 dyno pulls were made total, and these numbers shown were repeatable within 1hp or less both hot and cold.

I've done this 3 times, 2 different dynos, 3 different operators, I'm seeing appx. the same gains when comparing the JF Cold Rush vs Stock, untuned, regardless of which design revision I have tried... With a box fan. This test was run on 92 Oct E10 fuel out of the pump. The JF Cold Rush box tested this time was tested with Reflectix insulation available at Lowe's as the new mold for the silicone insulation was not finished yet for the larger airbox, which may have something to do with the heat soak difference, however, it's the first time I've tested "cold" vs "hot", and as I've always said, you can't escape the heat. So the results may be the same even with silicone box insulation... When the intake tubes were removed, the Cold Rush silicone intake tube was just warm to the touch both inside and out, where was Brand X was burning hot as has been previously mentioned by several people in the past during daily driving.

This was my first time running Brand X on the dyno, but not the first time on the street, or at the drag strip. I was honestly hoping for a larger gain to be shown here from Brand X, although when I've run it at the strip, I have typically seen very similar trap speeds to sock (usually within 1mph or less), so I should have figured as such would be shown.

I guess the next step is to get the "production" Cold Rush intake to the Name That Intake! contest winner so it can be tested against Brand T(uned) vs Cold Rush tuned (if that's still a go)... Current time frame, is unknown but getting closer; the new box insulation mold for the larger air box is still being worked on, as is the "No-Tune" maf piece. The "Tune" maf piece mold has not even been started on and I'm still waiting for the prototype to be finished.

05-22-2013 08:27 PM
coyotekiller So the "cold rush" is having trouble with heat soak despite having a silicone intake tube? Or did the intake tested not have this feature? And if the tube isn't hot to the touch, where would you be getting these heat problems from? The box?
05-21-2013 09:30 PM
RacnJsn95 Did some more dyno testing last weekend... The aptly named Cold Rush intake is showing appx. the same gains as it has in the past on a different dyno, so that's a plus. This testing was more of a "science test" than anything, testing different intakes for heat soak, letting the car sit and idle for about 5 minutes with the hood closed after the initial "Cold runs", then doing some "hot runs". The "cold runs vs hot runs" really showed some surprising results. The "competitor's" intake managed to stay within 3 hp of it's hot and cold runs while the stock intake lost 7hp from the repeatable cold numbers to repeatable hot numbers, and the JF Cold Rush lost 9hp from the repeatable cold to hot runs...

Defining cold/hot: A new intake was put on cold. The car was started, and with the radiator fans hot wired on via the fan trick, the CLT was allowed to stabilize at it's lowest point with the hood open. Typically the CLT would get down to 199 before the runs were started with the exception of the last run which was the JF intake was started at 203 because it wasn't getting any colder, at the time the CLT was deemed at it's lowest point, the fans were turned off and the hood closed for the runs... For the "hot" runs, the hood was left closed after 3-5 "cold" runs (after a repeatable number was run), and the car idled for appx 5 minutes, when the "hot runs" were started the CLT was always about 216 +- 1-2 deg, then the car was run again until a repeatable "hot" number was run...

Unfortunately, I don't have the dyno sheets as the printer was not working as per my usual luck when I go to dyno something I'm currently waiting for the run files to be emailed to me, but im sure it won't be until Monday at the earliest now as I haven't received them yet. I do have all of the run numbers written down, just no curves.

Keep in mind, not only am I on a different dyno, but I've also added high flow cats, and a ported TB since my last time on the dyno, so the numbers won't really coincide with older numbers exactly since they are higher.

Stock intake runs
"Cold": 388 HP 395.3 TQ
"Hot": 381 HP 397.1 TQ

Brand X intake runs
"Cold": 392 HP 403.6 TQ
"Hot": 388 HP 399.8 TQ

JF Cold Rush Runs
"Cold": 409.0 HP 407.1 TQ
"Hot": 400.3 HP 413.4 TQ

Needless to say, it was interesting. I expected more of Brand X, but I find it hard to believe that the dyno, or the testing was being run improperly as I've tested my intake 3 times now, on 2 different dynos, with 3 different operators, and my outcome over stock has been about the same each time. This was the first and only time I have, or plan to run Brand X on the Dyno.

A note on these numbers, posted... Typically I will junk the high and low numbers, although in this instance the Cold Rush instance was a repeatable number so I kept it, the Brand X cold run "repeatable" number is less than shown, but I'm giving it the benefit of the doubt with it's highest run as I thought it would be more... "Hot" run numbers shows the highest run from two runs that were within 0.8hp of each other.

I will edit this once I have dyno charts to post.
02-04-2013 12:32 PM

The name that intake contest starts TODAY! You can enter at the following link Contests | JacFab LLC : Custom Design & Camaro Accessories

Also be sure to like our Facebook page at ! We will be doing weekly price giveaways for the duration of the "Name that Intake!" contest
01-29-2013 09:47 PM
RacnJsn95 A lot of people have been waiting for quite a while for this... With the upcoming shipment of the first JacFab cold air intake to mark the beginning of independent testing and hopefully more test intakes to follow shortly after, it is time to start the JacFab "Name that Intake!" contest!

A lot of you have sent me names, and I hope you have held on to them, and have been thinking about them because the contest will start Monday Feb. 4th!

A lot of thought, design, time, and testing has gone into the intake, and with that, we feel it deserves a great name as well! If you haven't thought of a name yet, put your thinking caps on now! This is your chance to win and be one of the very first people to get one of the JacFab cold air intakes, as well as to have the winning name to be displayed on every JacFab cold air intake!

As well as the "Name that Intake!" contest, we will be doing weekly giveaways for JacFab products, apparel, and gift certificates for everyone that likes our JacFab Facebook page located at

On the morning of Monday Feb 4, the contest page will go live on our website, and this post will be updated with the direct link. To make things easy to keep track of, the contest will be database driven on our website. Everyone's name entries will be listed on a separate page which you are encouraged to view in hopes of getting lots of original names submitted. We are limiting the entries to 2 names per entry to hopefully give everyone a chance to submit an original name, and keep it fair to hopefully not have "that guy" submit 100 names

While you are not required to "Like" the JacFab Facebook page to win the "Name that Intake!" contest, and it will not increase your odds of winning, one of the prizes to be given away will be a big one that you're sure to like, and you will only be eligible to win prizes from the weekly Facebook giveaway if you like the page... Try it, you'll like it

Official contest rules below:
Entry Details: Entry is limited to two (2) names per person. Note that if trying to submit multiple entries from the same email address your original entry will be over written with your new entry, so no cheating! If caught submitting more than one entry you will be disqualified. If you choose, you can modify your submission at anytime by clicking the link that you should have received by email after submitting your entry. No purchase necessary to enter.

Grand Prize: The grand prize will be one (1) to be named JacFab cold air intake system, and the winning name shall be used as the applicable intake product line name henceforth. Only one (1) grand prize will be awarded to the winner of the “Name that Intake” contest.

Winning Decision: One winner shall be picked by the staff of JacFab LLC on, or around 3/8/2013. In the event of multiple entries submitting the same name, the entry that was submitted first will be awarded the winner. The current entry names are available for everyone to view, we encourage you to view the current entries prior to making your submission, as we encourage original entries. In addition to the name being “the best/coolest”, please be aware that the winning name must not be infringing on any current trademarks, or patents, if we are not able to use the name by law, we will have to move down the list of top names until we can trademark the name legally.

Prize Delivery: The prize will be sent to the grand prize winner within 3-4 weeks of the winner being chosen, shipping to be paid by JacFab LLC.

Additional Details: By submitting your entries you hereby release any and all interest of the said name entry to JacFab LLC to use freely. If chosen as the winner you shall receive the grand prize award, and will not be entitled to any further compensation, royalties for name use, etc.

Facebook Likes: Liking our Facebook page does not increase your odds of winning the Grand Prize, although it does make you eligible for weekly random giveaways that we will be doing during the duration of the “Name that Intake” contest. One (1) winner will be drawn at random for a random prize during each week of the contest.
As far as what you do with the grand prize, well that's up to you... We hope you will use it and love it, but at the moment the intake will only work for the V8 cars, so if you've got a v6 car we still hope you will enter the contest if you think you've got a great name. If someone wins and can't use the intake feel free to sell it, I'm sure someone would love to take it off your hands

The respective name entry owners will be kept hidden on the name entry page, but you are welcome to publicly tell everyone your submitted names, and discuss the contest on this post.
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