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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
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YOUR RESEARCHCold Air Intake
Leading reported evidence
Install fabspeed intake about 18 months ago and did a
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
I almost hesitate to mention this, but I installed the Fabspeed intake about 18 months ago and did a before after on MAF data (BlueDriver).
Leading evidence: 'Install fabspeed intake about 18 months ago and did a' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'owners stomping' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check pm' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Install now and sounds great/aesthetically pleasing
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
EVO is installed now and sounds great/aesthetically pleasing.
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Performed · outcome unconfirmed
With that said, I'm using an Evoms at the moment(for the better sound).
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
I used my tire pyre and it was over 200 degrees on an 80 degree day.
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Discussions that suspect a cause
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Suspected cause
If 20% more air was making it into the engine, seems that (in order to avoid leaning out the motor), the ECU would need to significantly increase the amount of fuel being injected into each cylinder, yet to the best of my knowledge the only decrease in fuel economy is due to owners stomping on the skinny pedal because the intake sounds "throatier."
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Suggestion
There's been documented increases on replacing stock paper element with higher flow gauze element, removing intake resonator, and using silicone elbow.
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Suggestion
I sent pics, they agreed it was a fitment issue, and he said it would be replaced under warranty, but they "haven't had any 996's available to test fit the new design" whatever that means.
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Suggestion
I sent pics, they agreed it was a fitment issue, and he said it would be replaced under warranty, but they "haven't had any 996's available to test fit the new design" whatever that means.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
owners stomping
No successful repair reported for this finding.
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Identified cause
1
Suspected cause
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Reported fixes
Read evidence and context
Discussions that suspect a cause
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Suspected cause
If 20% more air was making it into the engine, seems that (in order to avoid leaning out the motor), the ECU would need to significantly increase the amount of fuel being injected into each cylinder, yet to the best of my knowledge the only decrease in fuel economy is due to owners stomping on the skinny pedal because the intake sounds "throatier."
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
44 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Obviously they have either resolved the issue or they are still making the "old" design.
I just purchased (and had installed) a FABSPEED cold air intake for my 2004 C4S. Although the car sounds great, It seems that the car is now a little "sluggish" or slower as far as quickness goes. I had asked the mechanic if anything (in addition to the installation of the intake) would need to be done to a previous GIAC flash that was completed. They said no. Anything more that I should have asked?
You should have asked: "Will an aftermarket part be able to improve on the result from a team of some of the best automotive engineers in the world?"
The answer is "Usually not."
I actually did ask that, as well as solicited feedback from a couple of fellow 911 owners and they all said it would be quicker and faster. I was hoping for some insight on it.
Give it some drive cycles and some more mileage, the ECU may need some time to adapt to the increased airflow. I would contact GIAC themselves about that ECU tune and see if an optimized file is required when adding hardware on top of an existing tune.
Feel free to give me a call at [phone removed] (just ask for John Gaydos).
To each his own, although if you ever decide to test the waters let me know
Hey, good for you that you want to mod your car, make it 'yours'. Fabspeed makes outstanding products, and you've now got a contact who can guide you through. Airboxes get their share of debate.
Also, this forum is for the air-cooled cars, so you may want to post your query to the one specifically including your car.
I've done airbox upgrades on several cars, some were dramatically improved, others just noise and sensation. So get that thing set up right and enjoy your car! Best wishes to you.
Hmmm... Interesting. Does yours rub at the top of the CF tube under the decklid fan?? Mine does to the point where it wore through the finish (and several others as well, as discussed in an old thread on 6-speed). i've been going back and forth with Alex from FabSpeed for well over A YEAR (since March of 2015) waiting for it to be replaced. I sent pics, they agreed it was a fitment issue, and he said it would be replaced under warranty, but they "haven't had any 996's available to test fit the new design" whatever that means. Obviously they have either resolved the issue or they are still making the "old" design. If so, keep an eye on it so you dont wear through the finish.
Other than the crappy fit and horrible cust service, Ive been happy with it.
Initially they were very responsive, and had a chance to make me a VERY happy customer..but IM STILL waiting. Hope your luck is better than mine with them!
I swear by my fabspeed products to everyone. I have the intake, super cup exhaust, and headers on currently and without a doubt my car has improved from the day I got it. My cat bypass from fabspeed are en route to my house and I should have tomorrow. Before I put them on I am going to take a video of my current setup minus the cat, and then after and post. I am almost positive that I have video in my phone from when I had exhaust only, then exhaust with intake, then exhaust intake and headers, and will have with exhaust intake headers and cat.
The installation has to be suspect. If there is an intake air leak while it is ahead of the MAF it lets in engine compartment air and this is hot and this can result in diminished performance.
I looked up the kit and it consists of a hose and some carbon fiber thingie and the ad claims a 20% increase in air flow. A 20% increase in air flow should produce more than a few HP gain. I mean that's like bumping the engine displacement from 3.6l to 4.32l. One would expect a pretty big increase in HP from that.
It will probably feel more sluggish @ low speeds and low RPMs as the Fabspeed CAI is actually a
warm
air intake. Once you have some speed and rev's to clear out the "stagnant" hot air in the engine bay, you'll be able to make use of the "gains". An updated tune & exhaust will help maximize that.
Well, it might be that a different hose diameter or a smoother inside surface has the ability to move 20% more air than the stock equipment. An actual 20% increase in airflow, though, sounds sketchy.
On a normally aspirated car, the inbound air charge is introduced into the cylinder because there is negative pressure in the cylinder; the ambient air pressure pushes air into that void. It seems unlikely to me that simply increasing the diameter of the intake tube - without increasing the diameter of every other choke point in the engine such as throttle body, manifold, plenum, runners, etc. - would significantly increase the amount of air being introduced into each cylinder.
If 20% more air was making it into the engine, seems that (in order to avoid leaning out the motor), the ECU would need to significantly increase the amount of fuel being injected into each cylinder, yet to the best of my knowledge the only decrease in fuel economy is due to owners stomping on the skinny pedal because the intake sounds "throatier."
This stuff makes more sense to me on a forced-induction car where you really CAN affect the amount of air being stuffed into the engine; it hardly seems credulous that adjusting the intake tube size without modifying the cylinder vacuum and/or the barometric pressure would produce a drastic performance increase.
The best proven combo on a pretty stock engine has been a drop-in filter panel like K&N, BMC, etc. along with the silicone hose and getting rid of the snorkel assembly underneath. This has been dyno verified at one point. With that said, I'm using an Evoms at the moment(for the better sound). LOL. But I do still have my old setup that I just described and haven't really noticed anything on the butt dyno between the two FWIW.
One can also easily do their own test by logging MAF values on a Durametric or a professional scanning device compatible with the Porsche system. If you wanna go further, you can get a manometer to see the pressure differences as well.
I think some of the intakes do make a difference in peak power at some point in the powerband, but the 20% airflow increase seems incredibly optimistic.
I've had nearly every CAI there is on either my 986 or 996 because I'm a sucker for cool-looking gadgets - but I'm under no illusion that the increase is substantial enough to warrant the costs. Some of them are beautiful, like that new-ish one with two cone filters and the carbon-fiber Y pipe. If I had a pile of money sitting around to spend on stuff I don't need (you know, like my 996
), I'd get one of those.
I almost hesitate to mention this, but I installed the Fabspeed intake about 18 months ago and did a before after on MAF data (BlueDriver). I don't have the spreadsheet in front of me, but on that day, in that car the air temperature was the same as before or one degree (F) warmer and the flow metric was much higher. How that affects performance is up to interpretation. YMMV, T&Cs apply, blah blah blah.
I did speak with John at Fabspeed. He said to put some miles on the car and to drive it at the higher end of the rpm to possibly let the ECU do what it needs to. I will do that and see what happens. Thanks for the insight.
That's correct - personally, I was curious what kind of differences the car would report aside from "feel". Sorry, I wasn't responding to your post directly.
Gotcha. There's been documented increases on replacing stock paper element with higher flow gauze element, removing intake resonator, and using silicone elbow. I just think after that, increases can be negligible in moving to a cone setup unless doing it mainly for sound characteristics.
There is a "claw" intake setup for the Corvette I've been eying for years - I know it won't do ANYTHING as far as performance, but it looks fuggin' awesome and eliminates the ugly black ABS plastic airbox...
There is very little clearance in the Corvette nose where the factory air box sits...a full-size cone filter will not fit. Options include using a larger filter relocated in a hot area of the engine bay (stupid), installing an intake into the space where the license plate would go (ugly AND stupid), or one of the multi-filter rigs...
The diameter of those blue filters is about the largest thing you can fit in the area where cold air actually feeds into the Corvette engine bay...so in addition to making the owner imagine that his romantic prowess has been tripled, it also makes engineering sense.
Jury is still out for me.
EVO is installed now and sounds great/aesthetically pleasing.
I have a K&N in the garage that was on the car previously (terrible design) and a 997 3.8 air box on order.
Might try a Dyno comparison soon.
If you're wondering about the gold heat tape, it dropped the external temp of the intake pipe 70-80 degrees on track from 200 coming in hot post session to 120-130.
Tried the 3.8 airbox and also observed it side by side. Didn't do too much over the stock gutted(resonator removed) 996 box powerwise except look better. It may make a difference on a built motor but didn't see any gains on a stock internal motor.
On the Evo intake setup, you'll see more gains by cutting a vent above the filter on the factory decklid than any gains wrapping the intake will do. As you observed, the temps are lower but it really doesn't do anything for HP in the real world on that setup even though it sounds good on paper.
Did you also consider heat shielding the box in which the filter sits? It seemed to me that sucking in nice, cool air using the factory ABS intake tube and dumping it into a black steel box that is heated to whatever the ambient temperature of the engine bay was a great way to preheat that pesky cool air...but due to the fitment issues with my aero engine cover, I didn't bother trying to resolve any heat issues (real or imagined)...
At this point I'm more curious than anything. At the end of the day, I really don't think you're gaining or losing anything with these other than sound. The KN is the worst, there's no way that MAF location (16" from the TB) is getting an accurate enough reading for the DME.
Have been considering a second hole above the filter for a while. Will need to think about it some more from a hydro perspective
I wasn't expecting any gains from the wrap. When I would come into the paddock the EVO pipe which is metal (alum?) would be scorching hot. You couldn't even touch it. I used my tire pyre and it was over 200 degrees on an 80 degree day. Wrapped it in some gold heat shield and now its consistently around 120 - not sure if that translates to the inside but I'd imagine it does.
The box is actually hard ABS plastic and doesn't really transfer heat at all. The intake pipe from the TB to the Air Filter being metal does which is why I wrapped it.
