Halltech Style Cai/catback Drone
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,775
Likes: 1
From: Rehoboth Beach Delaware
Halltech Style Cai/catback Drone
Running an 06-C6-A6 Coupe with an early version of the generic (MN6/A4) GHL's.
Managed to resolve about all of the 1500-2000 RPM "cruising" drone with an installation in both the passenger and cargo compartment using Dynapad. I have detailed this install with pix in a previous thread in the C6 General section.
Also installed last year a SLP Blackhawk intake, which is similar in design to the Halltech unit.
Not interested in discussing the performance merits of either, more looking for comments on the noise level that the large open style air filter produces.
Yesterday I modified my stock fascia extension by cutting open the blank side faces, which is basically creates a Halltech style CAI.
Took the car out this morning and I noticed a "noise layer" missing.
Prior to opening the fascia there was a drone or reverberation on acceleration that I attributed totally to the catbacks. With the CAI this "noise layer' seems to be gone. Getting more of an air intake rushing sound.
To me this is good...anyone else with a similar setup notice this ????
Managed to resolve about all of the 1500-2000 RPM "cruising" drone with an installation in both the passenger and cargo compartment using Dynapad. I have detailed this install with pix in a previous thread in the C6 General section.
Also installed last year a SLP Blackhawk intake, which is similar in design to the Halltech unit.
Not interested in discussing the performance merits of either, more looking for comments on the noise level that the large open style air filter produces.
Yesterday I modified my stock fascia extension by cutting open the blank side faces, which is basically creates a Halltech style CAI.
Took the car out this morning and I noticed a "noise layer" missing.
Prior to opening the fascia there was a drone or reverberation on acceleration that I attributed totally to the catbacks. With the CAI this "noise layer' seems to be gone. Getting more of an air intake rushing sound.
To me this is good...anyone else with a similar setup notice this ????
Le Mans Master
Joined: Mar 2000
Posts: 6,560
Likes: 4
From: Tobacco Road NC
I have a 05 A4, and have the same mods you do...Halltech, standard GHLs and the open grill (I used a one inch wood drill on the flat area). I haven't noticed any difference in the exhaust sound, but I'll pay more attention later today when I go out.
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,775
Likes: 1
From: Rehoboth Beach Delaware
Originally Posted by catbert
I have a 05 A4, and have the same mods you do...Halltech, standard GHLs and the open grill (I used a one inch wood drill on the flat area). I haven't noticed any difference in the exhaust sound, but I'll pay more attention later today when I go out.
We discussed drilling on your thread, I had nothing to do yesterday so decided to take the fascia extension out.....it's really a flimsy piece of plastic, very flexible. What I noticed is once you cut out the large portion, you can see clear to the back of the car !!!! Apparently the area that the blank part of the fascia covers is open to the rear and probably supplies intake air to the stock setup. opening the front should give better flow and a bit lower air temperature then underhood temp !
Drifting
Joined: Jul 2005
Posts: 1,343
Likes: 1
From: CA
I would not recommend doing a Halltech-style CAI. I actually purchased their modified fascia, and your engine compartment gets covered in dust and debris. More concerning, I drove the car in the rain, nothing heavy, just a misty rain, and found the filter and its area wet. I have gone back to the stock fascia.
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Originally Posted by RBYCC
Running an 06-C6-A6 Coupe with an early version of the generic (MN6/A4) GHL's.
Managed to resolve about all of the 1500-2000 RPM "cruising" drone with an installation in both the passenger and cargo compartment using Dynapad. I have detailed this install with pix in a previous thread in the C6 General section.
Also installed last year a SLP Blackhawk intake, which is similar in design to the Halltech unit.
Not interested in discussing the performance merits of either, more looking for comments on the noise level that the large open style air filter produces.
Yesterday I modified my stock fascia extension by cutting open the blank side faces, which is basically creates a Halltech style CAI.
Took the car out this morning and I noticed a "noise layer" missing.
Prior to opening the fascia there was a drone or reverberation on acceleration that I attributed totally to the catbacks. With the CAI this "noise layer' seems to be gone. Getting more of an air intake rushing sound.
To me this is good...anyone else with a similar setup notice this ????
Managed to resolve about all of the 1500-2000 RPM "cruising" drone with an installation in both the passenger and cargo compartment using Dynapad. I have detailed this install with pix in a previous thread in the C6 General section.
Also installed last year a SLP Blackhawk intake, which is similar in design to the Halltech unit.
Not interested in discussing the performance merits of either, more looking for comments on the noise level that the large open style air filter produces.
Yesterday I modified my stock fascia extension by cutting open the blank side faces, which is basically creates a Halltech style CAI.
Took the car out this morning and I noticed a "noise layer" missing.
Prior to opening the fascia there was a drone or reverberation on acceleration that I attributed totally to the catbacks. With the CAI this "noise layer' seems to be gone. Getting more of an air intake rushing sound.
To me this is good...anyone else with a similar setup notice this ????
if i understand this correctly, you may be saying that by opening up or increasing the inbound airflow it has helped reduce some of the exhaust resoanance. yes, i believe this too be true. better flowing exhaust without increased intake airflow will result in increased resonance levels. i noticed this phenominon while experimenting with my own cold air intakes.
i also agree with the other 'poster' that spoke about some cold air inlet systems. yes, they not only help funnel in cooler air but with the air comes everything else, sand, dirt, etc.
anytime the 'shroud' is opened up without 'capturing' all of the air coming through that hole you will get more dirt and gunk into the engine compartment. yep, found that out by experience as well, another one of my experiments.
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,775
Likes: 1
From: Rehoboth Beach Delaware
Originally Posted by Zig
if i understand this correctly, you may be saying that by opening up or increasing the inbound airflow it has helped reduce some of the exhaust resoanance. yes, i believe this too be true. better flowing exhaust without increased intake airflow will result in increased resonance levels. i noticed this phenominon while experimenting with my own cold air intakes.
i also agree with the other 'poster' that spoke about some cold air inlet systems. yes, they not only help funnel in cooler air but with the air comes everything else, sand, dirt, etc.
anytime the 'shroud' is opened up without 'capturing' all of the air coming through that hole you will get more dirt and gunk into the engine compartment. yep, found that out by experience as well, another one of my experiments.
i also agree with the other 'poster' that spoke about some cold air inlet systems. yes, they not only help funnel in cooler air but with the air comes everything else, sand, dirt, etc.
anytime the 'shroud' is opened up without 'capturing' all of the air coming through that hole you will get more dirt and gunk into the engine compartment. yep, found that out by experience as well, another one of my experiments.
Forum is a great place to exchange ideas....
Usually whatever you want to do has been done before or is in the process of being done !!!!
Drifting
Joined: Jul 2005
Posts: 1,533
Likes: 0
From: az
Originally Posted by Irv
I would not recommend doing a Halltech-style CAI. I actually purchased their modified fascia, and your engine compartment gets covered in dust and debris. More concerning, I drove the car in the rain, nothing heavy, just a misty rain, and found the filter and its area wet. I have gone back to the stock fascia.
Drifting
Joined: Jul 2005
Posts: 1,343
Likes: 1
From: CA
Originally Posted by cbrf4i1
the mod fascia will not get your filter wet unless you drive into a hole that is 2 feet deep....your filter got wet from the gap between the front bumper and the hood....run a bunch of water over this gap for youself and see what happens.
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Drifting
Joined: Jul 2005
Posts: 1,533
Likes: 0
From: az
Originally Posted by Irv
That gap has a seal. How do you explain that after driving all winter in Oregon rains the stock air box came out as clean as a whistle? It turns out that modded fascia blows everything into the engine compartment... dirt, sand, rocks... and water. What a mess it made.
Instructor
Joined: Mar 2006
Posts: 153
Likes: 0
From: chicago il
Originally Posted by Irv
I would not recommend doing a Halltech-style CAI. I actually purchased their modified fascia, and your engine compartment gets covered in dust and debris. More concerning, I drove the car in the rain, nothing heavy, just a misty rain, and found the filter and its area wet. I have gone back to the stock fascia.
Drifting
Joined: Jul 2005
Posts: 1,343
Likes: 1
From: CA
Originally Posted by cbrf4i1
take a good look at what you call "seal" before you jump all over me...is it really all seal off? i don't think so...factory air box has a separate cover that covers the entire air filer and air filter box...when using hallteck style air filter, you don't use the factory cover any more....like i say, run some water over that area and see if your filter stays dry....before you jump over me...........user error.
As for hydrolock from this set up... I'm not in a position to judge, because I don't know how much water it takes to cause hydrolock. I suspect it would be on the order of 30cc/cylinder, so I'd bet against it. Nonetheless, the filter got wet. I suppose you think I've imagined that? If the water on the filter is caused by opening the hood after washing or rain, that would be only a few drops.
Look at it this way, it's my recommendation that cutting the fascia for cold air is not a good idea after personal experience. If you disagree that's fine with me.
Last edited by Irv; Jun 20, 2006 at 09:54 AM.
Drifting
Joined: Jul 2005
Posts: 1,533
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From: az
Originally Posted by Irv
It seals while the hood is closed. How do you have a user error of something that just cuts two holes in the fascia? I've screwed some things up before, but even I can't screw up two holes.
As for hydrolock from this set up... I'm not in a position to judge, because I don't know how much water it takes to cause hydrolock. I suspect it would be on the order of 30cc/cylinder, so I'd bet against it. Nonetheless, the filter got wet. I suppose you think I've imagined that? If the water on the filter is caused by opening the hood after washing or rain, that would be only a few drops.
Look at it this way, it's my recommendation that cutting the fascia for cold air is not a good idea after personal experience. If you disagree that's fine with me.
As for hydrolock from this set up... I'm not in a position to judge, because I don't know how much water it takes to cause hydrolock. I suspect it would be on the order of 30cc/cylinder, so I'd bet against it. Nonetheless, the filter got wet. I suppose you think I've imagined that? If the water on the filter is caused by opening the hood after washing or rain, that would be only a few drops.
Look at it this way, it's my recommendation that cutting the fascia for cold air is not a good idea after personal experience. If you disagree that's fine with me.
Instructor
Joined: Mar 2006
Posts: 123
Likes: 0
From: az
Originally Posted by Irv
It seals while the hood is closed. How do you have a user error of something that just cuts two holes in the fascia? I've screwed some things up before, but even I can't screw up two holes.
As for hydrolock from this set up... I'm not in a position to judge, because I don't know how much water it takes to cause hydrolock. I suspect it would be on the order of 30cc/cylinder, so I'd bet against it. Nonetheless, the filter got wet. I suppose you think I've imagined that? If the water on the filter is caused by opening the hood after washing or rain, that would be only a few drops.
Look at it this way, it's my recommendation that cutting the fascia for cold air is not a good idea after personal experience. If you disagree that's fine with me.
As for hydrolock from this set up... I'm not in a position to judge, because I don't know how much water it takes to cause hydrolock. I suspect it would be on the order of 30cc/cylinder, so I'd bet against it. Nonetheless, the filter got wet. I suppose you think I've imagined that? If the water on the filter is caused by opening the hood after washing or rain, that would be only a few drops.
Look at it this way, it's my recommendation that cutting the fascia for cold air is not a good idea after personal experience. If you disagree that's fine with me.
not a good week for you, irv, it looks like you been corrected a few times this week.
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,775
Likes: 1
From: Rehoboth Beach Delaware
Originally Posted by multishox
New member today. Have the same problem with Drone. C6 A6 paddle with B&B . How do I get to your pictures and instructions on dynamat installation! This sounds like a great discovery.
http://forums.corvetteforum.com/show...hlight=dynapad
http://forums.corvetteforum.com/show...hlight=dynapad
http://forums.corvetteforum.com/show...hlight=dynapad
Instructor
Joined: Mar 2006
Posts: 123
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From: az
Originally Posted by Irv
I haven't been corrected here, I'm being argued with. There's a big difference. 
http://forums.corvetteforum.com/show...1422960&page=2
http://forums.corvetteforum.com/show....php?t=1409236
and now this thread, better quit before you get too far behind.
Drifting
Joined: Jul 2005
Posts: 1,343
Likes: 1
From: CA
Originally Posted by npm
let me help you out. this one is your own quote. "My apologies. Someone PM'd me and said the K&N uses the same type of mounting plate as the Blackwing. I stand corrected.
and now this thread, better quit before you get too far behind.
and now this thread, better quit before you get too far behind.
Regarding the correction about the K&N, the "corrected data" supported my case. The part I was "wrong" about was that the Blackwing had a better method for securing the filter than the K&N, and it turned out they were about equal. Big deal, I was corrected on a detail point, where the correction better supported my original argument, and I was honest enough to admit a correction I received in a PM. Wow, that's really a sign of weakness.
Instructor
Joined: Mar 2006
Posts: 123
Likes: 0
From: az
Originally Posted by Irv
By "here", I meant this thread, regarding the issue of fascia modification.
Regarding the correction about the K&N, the "corrected data" supported my case. The part I was "wrong" about was that the Blackwing had a better method for securing the filter than the K&N, and it turned out they were about equal. Big deal, I was corrected on a detail point, where the correction better supported my original argument, and I was honest enough to admit a correction I received in a PM. Wow, that's really a sign of weakness.
Regarding the correction about the K&N, the "corrected data" supported my case. The part I was "wrong" about was that the Blackwing had a better method for securing the filter than the K&N, and it turned out they were about equal. Big deal, I was corrected on a detail point, where the correction better supported my original argument, and I was honest enough to admit a correction I received in a PM. Wow, that's really a sign of weakness.
lol, you still don't get it do you? i washed the car yesterday and i don't have your front fascia mod like you do and guess what? the halltech filter got wet through that gap. you been corrected again. stop passing
Drifting
Joined: Jul 2005
Posts: 1,343
Likes: 1
From: CA
Originally Posted by npm
lol, you still don't get it do you? i washed the car yesterday and i don't have your front fascia mod like you do and guess what? the halltech filter got wet through that gap. you been corrected again. stop passing
And funny, now that the car is back to stock, and I cleaned up the engine compartment, it is staying clean. End of story. If you want to argue further let's step outside...
