??
First mod
Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 1,030
Likes: 0
From: Pittsburgh PA
First mod
OK I've had the car a week and could not resist. I had to cut up that air filter cover. I can't see how any significiant amount of air could get through. I discarded the large cover altogether and cut the top off the two other covers. The filters are now exposed. I'm looking at removing the two plastic pieces behind the grill (one on each side) which would open up a direct airway to the filters.
Has anyone else done this?
Has anyone else done this?
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 aaaaa
OK I've had the car a week and could not resist. I had to cut up that air filter cover. I can't see how any significiant amount of air could get through. I discarded the large cover altogether and cut the top off the two other covers. The filters are now exposed. I'm looking at removing the two plastic pieces behind the grill (one on each side) which would open up a direct airway to the filters.
Has anyone else done this?
Has anyone else done this?
I would NOT recommend discarding the 'rain gaurd' (that's the large cover). The front seal leaks and the filters sit in the perfect position to capture water in the air cans. The hood seal really isn't a problem when driving in the rain but it is a problem if the car SITS in the rain. It's the water run off that seaps past the hood seal.
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
without the secondary filter you're going to get wet
I cut the primary filter covers off flush with some K&N's #33-2136. Then I put a piece of foam rubber about 1 1/2 inches thick, stuck it in the middle of the secondary cover with 2-way tape, to prop it up over the air bridge giving a great entry of air over the K&N's. Put that cover back on!!
andreas g.
andreas g.
Last edited by andreas g.; Sep 29, 2005 at 05:36 PM.
Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 1,030
Likes: 0
From: Pittsburgh PA
OK I see. I'm looking at Zigs pics and like the way he put the third filter in. It's hard to see exactly but I get the idea. What size PVC and how did you attach it? I'll take your advice and reinstall the 'rain cover'.
Thanks
Thanks
Drifting
Joined: Jul 2005
Posts: 1,969
Likes: 8
From: NJ
Zig,
Any noticable improvement fom such a set up? I am sick of hearing about the air intake debate. I got a good look at the vararam thing and its cake to make. I'm in the garage as we type, well that's not quite right, building a knock off. Only real "secret" I see is in the shape of the elbow that mates to the MAF. It seems to be a 4" pipe that was squashed to fit under the hood.
So, I'll make one for free and see if it works. I have plenty of hardware lying around from blower installs.
Any noticable improvement fom such a set up? I am sick of hearing about the air intake debate. I got a good look at the vararam thing and its cake to make. I'm in the garage as we type, well that's not quite right, building a knock off. Only real "secret" I see is in the shape of the elbow that mates to the MAF. It seems to be a 4" pipe that was squashed to fit under the hood.
So, I'll make one for free and see if it works. I have plenty of hardware lying around from blower installs.
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Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 1,030
Likes: 0
From: Pittsburgh PA
I don't have any proof but a similar mod was popular with the C5 and some people pooh-poohed it. Now I have a C6 and guess what? GM included that mod. How did GM get 50 hp out of eccentially(sp) the same motor? They did a lot of the mods we C5 owners were doing. Open the intake and exhaust.
Team Owner
Joined: May 2001
Posts: 35,996
Likes: 2,510
From: ...tearing up the highways, one state at a time™®©
Originally Posted by aaaaa
I don't have any proof but a similar mod was popular with the C5 and some people pooh-poohed it. Now I have a C6 and guess what? GM included that mod. How did GM get 50 hp out of eccentially(sp) the same motor? They did a lot of the mods we C5 owners were doing. Open the intake and exhaust.
...the extra displacement didn't have anything to do w/ it??
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 aaaaa
OK I see. I'm looking at Zigs pics and like the way he put the third filter in. It's hard to see exactly but I get the idea. What size PVC and how did you attach it? I'll take your advice and reinstall the 'rain cover'.
Thanks
Thanks
I'm using a 3" to 4" transition elbow. I used the old elbow as a template to get the proper angle. Opened up the hole in the duct a tad more. Put the pipe in. I make the hole a tad smaller than the pipe so I have to carefully force it in. Since it's pressed into a smaller hole the duct squeezes it tight (helps create a seal), I then used Permatex Ultra Black to seal up the outside. I only put the "rubber seal" on the outside (didn't want anything getting sucked into the engine). The "new" elbow is gonna provide a 3.5" opening into the duct with a 4" opening coming from the filter.
The other day I looking under the car while it was running and I could not only hear but feel a little bit of suction at the front filter.
I'm not sure of any gains. It felt like it did but unfortunately I didn't bo a before dyno. The last dyno I did (at 24k miles - and after water had been ingested into the engine at around 1500 miles - that's how I learned about the water guard) I had 350rwhp and 348rwtrq (dynojet) and a good air fuel ratio (it wasn't going rich as others have seen). The car is a mn6 non-z51, no-tune.
IMO: gains will minimal when tested on a dyno. When you make a dyno run they usually have two or three fans blowing air into the front of the car. The airflow is therefore constant, which is not the same as when you are driving, when driving the airflow will constantly be increasing the faster you go.
I have driven through multiple rainstorms and haven't had any problems with water. I've driven for hours in constant drizzle and pouring rain without any problems. I go though laser car washes and no problems.
My idea about the three filters is that any air that comes in via the stock filters (warmer since it comes from the engine bay) will be mixed with the cooler air coming from the thrid filter. I'm also thinking that the third filter will actually help the 90 degree transition of the air from the stock filters. I'm thinking, two inputs from the sides, will be pulled in and up from the input from the third.
Maybe I'm wrong and didn't gain a thing (that can be proven) but it was fun tinkering.
Last edited by Zig; Oct 3, 2005 at 02:17 PM.
Pro
Joined: Nov 2003
Posts: 570
Likes: 0
From: Olathe Kansas
Originally Posted by Zig
yep, been there done that, well more or less, check my photos for pics.
I would NOT recommend discarding the 'rain gaurd' (that's the large cover). The front seal leaks and the filters sit in the perfect position to capture water in the air cans. The hood seal really isn't a problem when driving in the rain but it is a problem if the car SITS in the rain. It's the water run off that seaps past the hood seal.
I would NOT recommend discarding the 'rain gaurd' (that's the large cover). The front seal leaks and the filters sit in the perfect position to capture water in the air cans. The hood seal really isn't a problem when driving in the rain but it is a problem if the car SITS in the rain. It's the water run off that seaps past the hood seal.
Wouldn't cutting the top off of the factory panel filters just allow a bunch of hot air negaiting and gains?
Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 1,030
Likes: 0
From: Pittsburgh PA
Originally Posted by Zig
the pvc in the pics was a three inch 45 degree elbow. I cut a hole in the bottom end of the stock duct. Put the pipe in, set everything in place. Put the filter in the bottom and worked worked worked until the found the proper position then marked the pipe and cut it so it had just a bit coming through into the duct. I attached the filter by using some pvc glue and attaching a drain fixture (the screw kind). it turned out ok but the version i'm working on now is gonna be a bit easier.
I'm using a 3" to 4" transition elbow. I used the old elbow as a template to get the proper angle. Opened up the hole in the duct a tad more. Put the pipe in. I make the hole a tad smaller than the pipe so I have to carefully force it in. Since it's pressed into a smaller hole the duct squeezes it tight (helps create a seal), I then used "rubber type black glue" (can't remember the name - I'll dig it out in a bit and edit the post to include it) to seal up the outside. I only put the "rubber seal" on the outside (didn't want anything getting sucked into the engine). The "new" elbow is gonna provide a 3.5" opening into the duct with a 4" opening coming from the filter.
The other day I looking under the car while it was running and I could not only hear but feel a little bit of suction at the front filter.
I'm not sure of any gains. It felt like it did but unfortunately I didn't bo a before dyno. The last dyno I did (at 24k miles - and after water had been ingested into the engine at around 1500 miles - that's how I learned about the water guard) I had 350rwhp and 348rwtrq (dynojet) and a good air fuel ratio (it wasn't going rich as others have seen). The car is a mn6 non-z51, no-tune.
IMO: gains will minimal when tested on a dyno. When you make a dyno run they usually have two or three fans blowing air into the front of the car. The airflow is therefore constant, which is not the same as when you are driving, when driving the airflow will constantly be increasing the faster you go.
I have driven through multiple rainstorms and haven't had any problems with water. I've driven for hours in constant drizzle and pouring rain without any problems. I go though laser car washes and no problems.
My idea about the three filters is that any air that comes in via the stock filters (warmer since it comes from the engine bay) will be mixed with the cooler air coming from the thrid filter. I'm also thinking that the third filter will actually help the 90 degree transition of the air from the stock filters. I'm thinking, two inputs from the sides, will be pulled in and up from the input from the third.
Maybe I'm wrong and didn't gain a thing (that can be proven) but it was fun tinkering.
I'm using a 3" to 4" transition elbow. I used the old elbow as a template to get the proper angle. Opened up the hole in the duct a tad more. Put the pipe in. I make the hole a tad smaller than the pipe so I have to carefully force it in. Since it's pressed into a smaller hole the duct squeezes it tight (helps create a seal), I then used "rubber type black glue" (can't remember the name - I'll dig it out in a bit and edit the post to include it) to seal up the outside. I only put the "rubber seal" on the outside (didn't want anything getting sucked into the engine). The "new" elbow is gonna provide a 3.5" opening into the duct with a 4" opening coming from the filter.
The other day I looking under the car while it was running and I could not only hear but feel a little bit of suction at the front filter.
I'm not sure of any gains. It felt like it did but unfortunately I didn't bo a before dyno. The last dyno I did (at 24k miles - and after water had been ingested into the engine at around 1500 miles - that's how I learned about the water guard) I had 350rwhp and 348rwtrq (dynojet) and a good air fuel ratio (it wasn't going rich as others have seen). The car is a mn6 non-z51, no-tune.
IMO: gains will minimal when tested on a dyno. When you make a dyno run they usually have two or three fans blowing air into the front of the car. The airflow is therefore constant, which is not the same as when you are driving, when driving the airflow will constantly be increasing the faster you go.
I have driven through multiple rainstorms and haven't had any problems with water. I've driven for hours in constant drizzle and pouring rain without any problems. I go though laser car washes and no problems.
My idea about the three filters is that any air that comes in via the stock filters (warmer since it comes from the engine bay) will be mixed with the cooler air coming from the thrid filter. I'm also thinking that the third filter will actually help the 90 degree transition of the air from the stock filters. I'm thinking, two inputs from the sides, will be pulled in and up from the input from the third.
Maybe I'm wrong and didn't gain a thing (that can be proven) but it was fun tinkering.