My New Velocity Stack

neo_ · Post by **neo_** » May 25th, 2006, 5:50 pm

So I finally hooked up my BP V-Stack to the end of my AEM 3" CAI, eliminating the possible heatsoak. I used pantyhose as a temporaly filter. A K&N filter is on the way. The throttle responce is slightly better, and it feels like it breaths easier closer to redline.

JDM Burgundy Pantyhose

Double Filtration, FTW

Pantyhose ripped in the test fit.

PrinceAli132 · Post by **PrinceAli132** » May 26th, 2006, 9:50 am

Looks good, im suprised you put it on without the filter. Diid you have to cut the AEM intake at all? And could you honestly not find anoter color pantyhose?

Ali

neo_ · Post by **neo_** » May 26th, 2006, 11:53 am

PrinceAli132 wrote:Looks good, im suprised you put it on without the filter. Diid you have to cut the AEM intake at all? And could you honestly not find anoter color pantyhose?

Ali

I should have the filter in wednesday. Pantyhose are alright temporaly, some people even put them on without a filter at all. No cutting needed. And thats JDM pantyhose, better filtration!

walker111 · Post by **walker111** » May 26th, 2006, 1:22 pm

I never understood the hype with these things

Post by **Dave-ROR** » May 26th, 2006, 3:00 pm

walker111 wrote:I never understood the hype with these things

dude his car now makes 40,386 hp, AT THE WHEELS!!!

It's NOT STOCK!!!!!

walker111 · Post by **walker111** » May 26th, 2006, 3:04 pm

Dave-ROR wrote:
walker111 wrote:I never understood the hype with these things
dude his car now makes 40,386 hp, AT THE WHEELS!!!

It's NOT STOCK!!!!!

Where can I buy one!?!?!?

neo_ · Post by **neo_** » May 26th, 2006, 3:15 pm

walker111 wrote:I never understood the hype with these things

Yeah, me either.

walker111 · Post by **walker111** » May 26th, 2006, 3:30 pm

Is that with or without a filter?

Post by **Dave-ROR** » May 26th, 2006, 5:00 pm

walker111 wrote:Is that with or without a filter?

It doesn't say with a filter in the chart, so I'd guess without. And once you add one, the gains will likely decrease to about the same, depending on how the filter is added to the system.

walker111 · Post by **walker111** » May 26th, 2006, 5:04 pm

Dave-ROR wrote:
walker111 wrote:Is that with or without a filter?
It doesn't say with a filter in the chart, so I'd guess without. And once you add one, the gains will likely decrease to about the same, depending on how the filter is added to the system.

Thats what I figured.

neo_ · Post by **neo_** » May 27th, 2006, 3:13 am

Dave-ROR wrote:
walker111 wrote:Is that with or without a filter?
Once you add one, the gains will likely decrease to about the same, depending on how the filter is added to the system.

Go look around in the H-T N/A forums, people have tested them with and without a filter. With minimal differences if any.

BryanPendleton · Post by **BryanPendleton** » June 16th, 2006, 7:49 am

Dave-ROR wrote:
walker111 wrote:Is that with or without a filter?
It doesn't say with a filter in the chart, so I'd guess without. And once you add one, the gains will likely decrease to about the same, depending on how the filter is added to the system.

This testing was performed on a B20 last weekend.

ITR862 · Post by **ITR862** » June 17th, 2006, 5:30 am

I wouldn't think that little thing would help any. Has anybody tried to dyno without a filter or stack? Looks to me the extra gains are from just removing the filter. I could be wrong though.

BryanPendleton · Post by **BryanPendleton** » June 18th, 2006, 9:41 am

ITR862 wrote:I wouldn't think that little thing would help any. Has anybody tried to dyno without a filter or stack? Looks to me the extra gains are from just removing the filter. I could be wrong though.

Without diving into fluid dynamics, the gains come from how the air flow is controlled not the "restrictiveness of the air filter media". If you pull the filter off a standard intake and leave plan end pipe exposed without a filter you can kill flow as much as 30-40%. Why? The fluid seperates at the entrance effectively creating a HUGE choke. I have modeled this in with CFD software and seen it in lab tests at the University of Houston.

ITR862 · Post by **ITR862** » June 22nd, 2006, 1:17 am

Ahh, ok. My Comptech Icebox has a stack shape to it at the end which is basically the same thing right?

BryanPendleton · Post by **BryanPendleton** » June 22nd, 2006, 8:59 pm

ITR862 wrote:Ahh, ok. My Comptech Icebox has a stack shape to it at the end which is basically the same thing right?

Same thing? No. Improvement? Yes. Without knowing the geometry I cannot comment on it, but I will say that plan end pipe, square shoulder inlets, and even radiused inlets seen on some premium filter will generally fall short of preventing seperation of the flow at the entrance from the CFD studies I have run. On the other end, figuratively, you don't want to taper the stack too much as that simply destroys the pressure differential that is driving the flow to begin with.

ITR862 · Post by **ITR862** » June 23rd, 2006, 11:01 pm

Ok thanks.

BryanPendleton · Post by **BryanPendleton** » July 7th, 2006, 1:41 pm

Neo, did you get a filter for your intake system? Saw your dyno, nice build. Looks like a fun car.

neo_ · Post by **neo_** » July 8th, 2006, 12:13 am

Oh yes I have, here are the pics of the K&N Filter:

Thanks, it does the job

SerGTR · Post by **SerGTR** » July 8th, 2006, 3:37 am

such a nice filter, how did you get it?

neo_ · Post by **neo_** » July 8th, 2006, 8:48 am

SerGTR wrote:such a nice filter, how did you get it?

Looked at K&N's site for all the filters they made by dimensions.

BryanPendleton · Post by **BryanPendleton** » July 12th, 2006, 11:00 am

Here is a tip I recommend neo. That filter has a 1" flange length if I recall correctly, I would position the filter down on the flow stack another 1/4"-3/8" of an inch. This keeps the ID of the flange from "blocking" the radiused contour of the stack. Double check your flange length though, as the flow stack was designed for 5/8" flange length. Simply slide the filter down the difference and you should be good to go.

BryanPendleton · Post by **BryanPendleton** » January 31st, 2007, 8:13 am

neo_ wrote:So I finally hooked up my BP V-Stack to the end of my AEM 3" CAI, eliminating the possible heatsoak. I used pantyhose as a temporaly filter. A K&N filter is on the way. The throttle responce is slightly better, and it feels like it breaths easier closer to redline.

You got a chance to dyno your car yet?

neo_ · Post by **neo_** » February 12th, 2007, 9:08 am

BryanPendleton wrote:
neo_ wrote:So I finally hooked up my BP V-Stack to the end of my AEM 3" CAI, eliminating the possible heatsoak. I used pantyhose as a temporaly filter. A K&N filter is on the way. The throttle responce is slightly better, and it feels like it breaths easier closer to redline.
You got a chance to dyno your car yet?

http://www.phearable.net/album/displayi ... at=0&pos=4

That was with 104 F ambient temperatures in the dyno room,. I also installed a new SMSP Header and Exhaust after it. It probally puts down around 210-215 WHP now.

tartje · Post by **tartje** » February 12th, 2007, 3:00 pm

i'd be shit scared of going ANYWHERE near water with a filter down there like that

ITRCA

My New Velocity Stack

My New Velocity Stack

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