Sigh, Velocity Stack Round 2
09-12-2011, 06:51 AM
#43
With the Apexi filter, the bellmouth and filter are integrated together. I'm not sure if the base diameter of it is 6" or not, but it does neck down to 3". Apexi does call their Power Intake filter a dual funnel. The bellmouth on the bottom, and the cone on the top to smoothly direct airflow downwards.
As far as the Apexi being loud due to turbulence, that would be highly unlikely since it was designed for virtually turbulence-free airflow. I believe their loudness is caused by the synthetic filtering media that is used. It doesn't muffle as much sound as other types of filtering media, at least from my conclusions.
The lower body and inner cone from what I found out is made of a hard resin, and has two bolt hole patterns for an adaptor.
As far as what exactly the filtering media is made of, I haven't been able to find out anything exact. So far the only info I've been able to get doing some research is that it's made from a synthetic dry (no oil) density fibers. The material is thin enough to easily see light through it, yet it's dense enough to be really strong, and it has one of the highest filtering efficiencies on the market. I haven't been able to find out what the micron size it filters to, but in north Florida with all the sand and dust on the roads, the inside of my Berk intake tube is squeaky clean. I occasionally take a small soft bristle brush vacuum attachment to it to get the sand off of the filter.
As far as the Apexi being loud due to turbulence, that would be highly unlikely since it was designed for virtually turbulence-free airflow. I believe their loudness is caused by the synthetic filtering media that is used. It doesn't muffle as much sound as other types of filtering media, at least from my conclusions.
The lower body and inner cone from what I found out is made of a hard resin, and has two bolt hole patterns for an adaptor.
As far as what exactly the filtering media is made of, I haven't been able to find out anything exact. So far the only info I've been able to get doing some research is that it's made from a synthetic dry (no oil) density fibers. The material is thin enough to easily see light through it, yet it's dense enough to be really strong, and it has one of the highest filtering efficiencies on the market. I haven't been able to find out what the micron size it filters to, but in north Florida with all the sand and dust on the roads, the inside of my Berk intake tube is squeaky clean. I occasionally take a small soft bristle brush vacuum attachment to it to get the sand off of the filter.
I think that Apexi has a 4.5- 5" base if that! I've seen them and worked on a couple of Maxima's with them and they're definitely smaller than a 6" inlet filter....
Last edited by CMax03; 09-13-2011 at 12:21 AM.
09-12-2011, 02:07 PM
#45
Found a few detailed pics of the Apexi. Here is the rear, and you can clearly see the metal threads. Mine screwed down nice and snug, no fitment problems with the supplied Apexi adapter whatsoever.
In this pic you can see the top cone that tapers down to direct airflow downwards, and a better view of the mounting holes as well.
In this pic you can see the top cone that tapers down to direct airflow downwards, and a better view of the mounting holes as well.
http://forums.maxima.org/5th-generat...ton-3-5-a.html
09-13-2011, 12:18 AM
#46
09-13-2011, 04:33 AM
#47
09-13-2011, 05:17 PM
#48
Junior Member
Thread Starter
Join Date: Sep 2010
Location: Chapel Hill, NC
Posts: 53
Ok, I just replaced the MAF in my car today...... Wow is all i can say; I was wondering where all my top end had gotten to.
As for my setup. Im running the BPI flowstack to a 6" AFE Dryflow filter. I still have the stock resonator in place. Rochester, is it even possible for me to delete the resonator off of my 3.0L?
As for my setup. Im running the BPI flowstack to a 6" AFE Dryflow filter. I still have the stock resonator in place. Rochester, is it even possible for me to delete the resonator off of my 3.0L?
Last edited by elytle16; 09-13-2011 at 05:20 PM.
09-13-2011, 07:16 PM
#53
I already said that my midpipe came as part of a SRI kit from a long-dead company called Frankencar.And knight_yyz will make you a mid-pipe to support the 3.0L engine. It's no big deal, you just need two more vacuum leads of a smaller size than the VC breather.
09-13-2011, 07:19 PM
#54
Senior Member
Join Date: Sep 2010
Location: Jacksonville, FL
Posts: 10,349
This is what I was referring to. I remember you saying you had a frankencar midpipe, I just couldn't recall who you knew that made those midpipes here on the org. Sorry bout the confusion.
09-19-2011, 09:58 AM
#55
Junior Member
Thread Starter
Join Date: Sep 2010
Location: Chapel Hill, NC
Posts: 53
Ok, I'll talk to knight about the mid pipe. The flowstack came in the mail today so I'm going to take some pics and let you guys know if I can feel any difference. I'm going to install it in a little bit. Do you know what knight_yyz charges for the midpipe?
09-19-2011, 05:56 PM
#56
If you're serious, just PM him... why would you ask us
09-19-2011, 11:28 PM
#57
Junior Member
Thread Starter
Join Date: Sep 2010
Location: Chapel Hill, NC
Posts: 53
As for the flowstack, I installed it, and I can feel a bit of a difference. It isnt any louder, but it does seem to deliver power smoother. My low RPMS def. feel stronger. But it's not a HUGE change.
09-19-2011, 11:52 PM
#58
it's this from silicone intakes and some ace hardware parts
Stainless Steel Joiner with Water Injection/Probe Taps, 3.0"
09-20-2011, 04:38 AM
#59
That set up will cause a ton of turbulence in the intake at one of the worst spots, right before the TB. You're better to have one tube branch off then branch off to the other 2 vacuum lines.
09-20-2011, 07:46 AM
#61
OP, purchase a proper mid-pipe from knight_yyz and stop messing around with foam socks and what-not.
09-20-2011, 08:18 AM
#64
The threads don't extend into the pipe itself and air takes like everything the path of the least resistence. Since there is all the suction going into the TB I don't think the air is getting redirected at all.
09-20-2011, 08:06 PM
#67
This is the reason any reputable company will make one pipe run off, then branch out from that farther down the line, as Knight_yyz's pipes do.
09-21-2011, 05:21 AM
#68
To clarify, the reason for the turbulence is not due to the threaded holes, or any specific material protruding into the intake stream pipe. The turbulence is caused by air being redirected and drawn from different locations. A standard single hole causes turbulence all by itself, to put 3 of them right next to each other will cause excessibe turbulence in the pipe. The worst part is its immediately before the TB, so it doesn't even have time to calm down, air is coming at this turbulent zone, and then the TB is causing it's own venturi effect trying to pull it in, the whole thing is just a bad design.
09-21-2011, 05:32 AM
#70
Hi, Perk!
09-21-2011, 01:44 PM
#73
1.) Get a WB to monitor AFR
2.) Get an LRMAF
3.) Get a software aid, such as SAFC or EMU to make the LRMAF PnP
4.) Have knight make you a 3.5" pipe or buy one from www.siliconeintakes.com
5.) Get a velocity stack from the company of your choice & couplers
6.) Profit
7.) ????
2.) Get an LRMAF
3.) Get a software aid, such as SAFC or EMU to make the LRMAF PnP
4.) Have knight make you a 3.5" pipe or buy one from www.siliconeintakes.com
5.) Get a velocity stack from the company of your choice & couplers
6.) Profit
7.) ????
09-21-2011, 03:41 PM
#74
09-25-2011, 07:55 AM
#77
I don't recall what the 3rd one is for I'll have to check the FSM when I am at home, now I'm curious.... maybe it's faster to just go look
but I'm feeling a touch lazy after a birthday weekend.
09-25-2011, 11:36 AM
#78
happy birthday!
it goes all the way to the upper left corner to the firewall into a metal T fitting with a electric plug in it. from there is a hose going to the powersteering or waterpump area? (front of engine).
Another OT question. When using the BOP and power rod removal, what happens to the swirl valves? are they stuck closed the entire time?
it goes all the way to the upper left corner to the firewall into a metal T fitting with a electric plug in it. from there is a hose going to the powersteering or waterpump area? (front of engine).
Another OT question. When using the BOP and power rod removal, what happens to the swirl valves? are they stuck closed the entire time?
09-25-2011, 11:42 AM
#79
Senior Member
Join Date: Sep 2010
Location: Jacksonville, FL
Posts: 10,349
I believe the swirl valves are located in the lower manifold, not the upper, and I also believe it was for the Cali emission cars. Not 100% sure if that applies to Infiniti's or not.
09-25-2011, 05:56 PM
#80
happy birthday!
it goes all the way to the upper left corner to the firewall into a metal T fitting with a electric plug in it. from there is a hose going to the powersteering or waterpump area? (front of engine).
Another OT question. When using the BOP and power rod removal, what happens to the swirl valves? are they stuck closed the entire time?
it goes all the way to the upper left corner to the firewall into a metal T fitting with a electric plug in it. from there is a hose going to the powersteering or waterpump area? (front of engine).
Another OT question. When using the BOP and power rod removal, what happens to the swirl valves? are they stuck closed the entire time?
It really bothers me not having the FSM downloaded on this computer, I'm never home anymore, but I can't find the damn FSM download link now! Now this is bothering me...