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View Full Version : oem intake are with velocity stack.


THEHMONGYAJ87
05-24-2011, 04:12 PM
Alright I just bought a bpi 3.5" velocity stack with a k&n filter to replace the stock air box. I haven't seen anyone use this on there xd before. Coming from hondas, they use v-stacks to smooth out the air. I haven't receive it yet so I'll update after I receive it and install it. I notice the plastic intake arm where the maf goes has these things in there around the maf sensor that will cause turbulence. I'll probably cut these out and smooth out the inside of the arm with a dremel and sand paper with the maf out. Just incase this might cause a check engine light, can anyone enlighten me on this. I do notice that aftermarket intakes don't have these around the maf so I shouldn't be worry about anything going wrong. Will post pics of install.

CXTKRS1
05-24-2011, 04:31 PM
Hold up I'm confused here the air will unsmooth (I guess you can say that) when it enters the intakes and flows to the valves in head. What is the point of this device?

THEHMONGYAJ87
05-24-2011, 05:09 PM
go seach on velocity stack. I can't really explain this, but at the filter, it creates a air buble and with a velocity stack the air will enter the intake smoother. I'll try to find a link to my old honda forums.

---------- Post added at 03:05 PM ---------- Previous post was at 02:59 PM ----------

here:

http://www.team-integra.net/forum/15-advanced-tech-corner/192816-velocity-stacks-increase-flow.html

---------- Post added at 03:09 PM ---------- Previous post was at 03:05 PM ----------

and here:

http://www.team-integra.net/forum/11-generation-three/55753-headlight-intake-duct.html

xd_kidd
05-24-2011, 07:56 PM
Ok ii guess ii think ii kno what he's saying. Because the shape of the head of the pipe. Its designed to get more air to flow creating more power as to the a normal end pipe. Air would try to cram all the air at once which makes less effiecient than the stacks. In theory and design it looks good. But idk if its gonna make much different. I give it a point for being creative tho. My friend had it on his ferio

THEHMONGYAJ87
05-24-2011, 08:44 PM
it won't make much different but it's there. it cost roughly $100 and perform the same or better than a tube with a filter that costs $150-300. add this to a aftermarket intake and you'll see better gains, not alot to notice but again it's there.

xd_kidd
05-24-2011, 10:50 PM
wait. i just read the 1st link you posted and it said they lost power and had dyno (dyno 3 m5 forums) runs to show it... but the air duct idea isnt bad. and i read that some of the honda ppl retuned their cars to get some power. but we'll see when u get urs. wheres the a/f shot in those? and for the ppl running without filters.. dont we need filters?

THEHMONGYAJ87
05-24-2011, 11:38 PM
no u didn't understand it. the m5 forums had stock stacks tuned for the motor already and by changing the stacks to shorter wider ones, they lost low end. For hondas and toyota it might be different. I know lots of honda 4-bangers use v-stacks to improve their hp numbers and better run times, not so sure about toyota but I assume the same would benifit toyota motors too since they are so alike. For honda some manufactures produce intake with v-stack in their intakes like Mugen and Comptech/Ct-Engineering with success in improving hp and tq numbers. And shouldn't our ecu adjust/adapt to the new intake. just seeing if any scion owners are interested since I don't really see anyone using these. You can get a stack for $30-40 off ebay and any filter with a 6" diameter neck will fit. Just make sure you get a composite so your intake won't heat soak as much.

---------- Post added at 09:38 PM ---------- Previous post was at 09:35 PM ----------

oh and btw tuning your car will always get better gains. That goes for every mods, tunning your car always gets better gains in hp/tq #'s and mpg's.

Resolve
05-25-2011, 03:15 PM
no u didn't understand it. the m5 forums had stock stacks tuned for the motor already and by changing the stacks to shorter wider ones, they lost low end. For hondas and toyota it might be different. I know lots of honda 4-bangers use v-stacks to improve their hp numbers and better run times, not so sure about toyota but I assume the same would benifit toyota motors too since they are so alike. For honda some manufactures produce intake with v-stack in their intakes like Mugen and Comptech/Ct-Engineering with success in improving hp and tq numbers. And shouldn't our ecu adjust/adapt to the new intake. just seeing if any scion owners are interested since I don't really see anyone using these. You can get a stack for $30-40 off ebay and any filter with a 6" diameter neck will fit. Just make sure you get a composite so your intake won't heat soak as much.

---------- Post added at 09:38 PM ---------- Previous post was at 09:35 PM ----------

oh and btw tuning your car will always get better gains. That goes for every mods, tunning your car always gets better gains in hp/tq #'s and mpg's.
I say grab a $20 $25 cone filter and slap on there and call it a day. No real need, at this time based on support, for the extra smooth intakes or at least for the cost of them. Your basically paying $80 to $100 more for minimal to no gains.

Also, not every mod will get you gains in HP and TQ. Everything must work together (which I am sure most people on here know). And some mods may lose you power if parts are mismatched. As it sits right this second I would be more interested in lower end to mid TQ and Power. Since I do alot of red light driving and all I want more power for the take off and launch than I do at the top end. You can have all the top end power in the world, but if you have no low end power you aren't going to get to that top end very fast. But also vice versa you can have all low end power but then you run out of top end power to early. I know this.

THEHMONGYAJ87
05-25-2011, 04:20 PM
i'm not telling everyone to get this, im just saying this to those who have bought their short rams for $150-300. yes this will not net the most gains but it nets the same or better gains that buying a short ram. this is just a opinion of mine and i want to share this with the fellow xd owners out there who are try to squeeze the most hp/tq out of their little box. this has been proven many times already that slapping a velocity stack on the end of a intake or turbo charger will yield better gains comparing to a intake without one. and with tuning you could gain more with this setup. it's just a cheap mod that will yield better gains than those $150-300 intakes out there. I notice that the xd doesnt have too much aftermarket support out there and just wanted to bring this along from what I've experience with hondas when i was modding them.

Resolve
05-25-2011, 04:45 PM
I wasn't saying that you were telling people to do it. I agree with the intake thing as far as paying for a small piece of pipe that is not netting really any more gains (based on butt dyno) than just slapping a $20 cone filter. I just don't see the need if just doing it for a smooth intake.

Also just commenting on the fact that not everything is going to create a gain for all cars.

If people want to do it great, but if you show me with dynos that it make a big enough difference to support the funds I may do it.

THEHMONGYAJ87
05-25-2011, 05:31 PM
yes i'm sorry if i sounded alittle defensive. i'll correct myself, not all mods will improve hp/tq numbers. i meant to say tuning a car will always improve the car even if it was stock, but not worth it if you planning on adding more mods. our xd should adapt to the smoother more faster air flow. i'm not going to dyno this just for a intake change. it's just that if u planning on putting a intake on then mind as well do it rigt the first time than getting a filter and then changing it for a better intake later on. i'll post up pics after i get it and install it. won't be a noticable gain but oh well, better than nothing. cant wait to get this on and pull gsr's and xrs's out there....;P

xd_kidd
05-25-2011, 07:48 PM
I mean yea it won't make much difference in power but in appearence it does. So I'll give you props for bringing. Something new to look at. That's what scions are designed for .. themes/appearence to the owners liking.

Resolve
05-26-2011, 08:58 AM
yes i'm sorry if i sounded alittle defensive. i'll correct myself, not all mods will improve hp/tq numbers. i meant to say tuning a car will always improve the car even if it was stock, but not worth it if you planning on adding more mods. our xd should adapt to the smoother more faster air flow. i'm not going to dyno this just for a intake change. it's just that if u planning on putting a intake on then mind as well do it rigt the first time than getting a filter and then changing it for a better intake later on. i'll post up pics after i get it and install it. won't be a noticable gain but oh well, better than nothing. cant wait to get this on and pull gsr's and xrs's out there....;POK now we see on same level I see what you mean now. yes tuning the vehicle for the mods you put on will always benefit. I read it as meaning mods in general will always inmprove.

Will the velocity stack make a difference over me just slapping a cone filter on, in theory yes it should.

As xd_kidd said it will look better than what I have which in looks is a plus. And completely agree with making it your own.

And I applaud people making attempts at trying to find ways to increase mods for our car. Especially since there is no love for the xD. So I don't want my posts on here at anytime coming off as other wise even though I know they do. I like playing Devils Advicate though. There is a difference , not to you specifically, with someone saying hey this should work and it only cost this much and a person or company saying this will work but it will cost this much. You know again nothing at you personally with that just a general statement. But if some one comes on here and says it should work and tries it and it works as good or better than expected for less than other parts HELLZ YEAH then. Also I look at cost per increase.

---------- Post added at 09:58 AM ---------- Previous post was at 09:57 AM ----------

oh and good luck with it and I do hope it works out and you have a noticeable gain even in the butt dyno

xd_kidd
05-26-2011, 12:23 PM
yea ii wouldnt mind owning one of these before ii swap motors next yr lol

so explain to me again on what parts to get... pictures help lol .. is there a slot for the maf? and ii want the purple stack in the end :D

http://i56.tinypic.com/211qya0.jpg

THEHMONGYAJ87
05-26-2011, 01:51 PM
Basically you just need the stack, a coupler and a 6" inlet filter. I'm planning on using the oem Maf sensor pipe and the stock intake arm until I can find a better replacement for it. I wanted a silicone intake tube intsead of the aluminum pipe intake to reduce as much heat soak as possible. The one bought is a BPI stack with a k&n filter from this website http://www.bpinitiatives.com/?gclid=CJ7Cr_ShhqkCFRs5gwodWDK0rA
kinda pricey but the r&d put into making this is worth it. The one you posted up is made by blox, a replica of the BPI stack, however they offer it in aluminum and different anodize colors.
http://i181.photobucket.com/albums/x101/hueyang87/blox.jpg
http://i181.photobucket.com/albums/x101/hueyang87/imagesCAJCIOA3.jpg

---------- Post added at 11:51 AM ---------- Previous post was at 11:48 AM ----------

I haven't found a picture of a xD with one yet so I'll post one up of after installation with and without filter.

xd_kidd
05-26-2011, 02:11 PM
any idea as to when your getn it kinda curious to see it on a scion lol. so we can run it without filter? ii think ive seen a filter inside a stack.. or a cloth around the stack...

THEHMONGYAJ87
05-26-2011, 02:22 PM
Here are some things I'm thinking of for the xD. If someone with some fiberglass or carbon fiber fabing skills can fab/mold this up for the xD, then it would be awsome. Just clamp a dryer hose on the end of this and route cold air to your short ram intake or run your cold air intake straight to the air dam. Will look very nice too with the carbon fiber finish.

xD air dam: http://i181.photobucket.com/albums/x101/hueyang87/l_081a68a54edcb62dc0678e4e931c91f8.jpg

J-racing air dam for jdm itr: http://i181.photobucket.com/albums/x101/hueyang87/imagesCA0H650C.jpg

http://i181.photobucket.com/albums/x101/hueyang87/imagesCAXK5C75.jpg

http://i181.photobucket.com/albums/x101/hueyang87/imagesCASYJF9C.jpg

---------- Post added at 12:22 PM ---------- Previous post was at 12:12 PM ----------

any idea as to when your getn it kinda curious to see it on a scion lol. so we can run it without filter? ii think ive seen a filter inside a stack.. or a cloth around the stack...

Hopefully I get it by the following week so I can install it and take pictures. You could run a pantyhoe or mesh or whatever you want to run on it to keep larger depris out.

http://i181.photobucket.com/albums/x101/hueyang87/imagesCATTC6WG.jpg

xd_kidd
05-26-2011, 02:34 PM
i dont think our ppl really kno much about fab esp myself. cowl scoop is available but idk where. not many where interested. maybe running funnel could work but i doubt it be much efficient
http://i53.tinypic.com/23r213n.jpg

THEHMONGYAJ87
06-01-2011, 01:15 AM
Alright, so I received my stack and filter today. installed it and didn''t really feel any difference other than the intake got louder. plus my xd is an automatic so there's not much you will notice from it, but the rpm seems to climb faster, owell. It was a pretty tight fit because of the v-satck and the size of the filter. It was dark already and I used my phone to take pictures so sorry for the sh**ty pics.

http://i181.photobucket.com/albums/x101/hueyang87/26a2ff2e.jpg
http://i181.photobucket.com/albums/x101/hueyang87/9380a40c.jpg

simmons0613
06-01-2011, 06:35 AM
it doesnt look much different than the spectre intake we all have. Just let up know how it drives over the next few days.

Resolve
06-01-2011, 09:36 AM
^^^ it is just a filter from the looks, the filter is slipped over the velocity stack.

If you look at the pic and you see the bands that is used to hold the filter on one at the back of cone. And you see the plastic ribs right after that. that is the rids on the back of where the velocity stack curves. then you have th coupler between the velocity stack and the MAF.

---------- Post added at 10:36 AM ---------- Previous post was at 10:27 AM ----------

And J87 (sorry to shorten couldn't remember you whole screenname, no disrespect) Based on what you are saying it may not add HP or any significant HP anyways, but by increasing the RPM acceleration speed that means you hit the power band a little faster and it probably increase the power band size just a little. Which is a plus. And it probably inproved your overall acceleration.

Almost like the throttle body spacer that this guy was selling for the first gen xBs, I had one and my friend got one. I had Manually and he had Automatic. The spacer had Hellical (?sp) cuts in it to twist the air. Now you may say it wouldn't do anything, but it did, it changed the power band on both and helped acceleration. MY power normally didnt really start until about 1750 to 2000 RPM and ended about 5000, but with the spacer my power band changed and I could feel more pulling power from about 1250 to redline in all gears.

and his automatic power band changed. I don't know his starting power RPM and how it changed, but his automatic would shift around 5000 or so even if he had it floored. but with spacer if he had it down the RPM went all the way to REDLINE before shifting. and his acceleration increased a little also,

THEHMONGYAJ87
06-01-2011, 10:41 AM
I dont really know if it did anything, but I took it out after I installed it and floor it on the freeway, it did seems like it picks up faster, I mean the rpm shoots up to redline but I didn't really want to push it hard because I only have 700 miles on the odo and dont want to mess up anything yet, lol. But I took my bro along and he's thinking about getting one for his 06 rolla xrs. The automatic tranny sucks cause everytime it shifts, it lags for a second then shoots up again. Wish I waited for a standard, but this is my wife's car afterall. Oh I miss my old gsr...:(

---------- Post added at 08:40 AM ---------- Previous post was at 08:28 AM ----------

Oh and btw way, better pictures..

http://i181.photobucket.com/albums/x101/hueyang87/d0fea6a3.jpg

http://i181.photobucket.com/albums/x101/hueyang87/8f1b66c5.jpg

http://i181.photobucket.com/albums/x101/hueyang87/edc6c99f.jpg

I'm thinking about getting a dc sports cold air intake since it's a one piece design and it eliminates the stock maf tube. Plus it's a straight shot from the tb so I don't have to worry about any turbulence.

---------- Post added at 08:41 AM ---------- Previous post was at 08:40 AM ----------

http://i181.photobucket.com/albums/x101/hueyang87/dcsports.jpg

xd_kidd
06-01-2011, 12:02 PM
damn ii forgot our engine bay can be that clean.. mines need a good cleaning!

JDMJim
06-01-2011, 01:35 PM
i don't get it....

http://www.mormonwiki.org/images/thumb/3/3a/Man_shrugs.jpg/300px-Man_shrugs.jpg

i see no benefit without a dyno sheet to prove it. Spectre is all that's needed. using the OE corrugated pipe will screw up the airflow anyway.

this is the only time a velocity stack is needed
http://image.superstreetonline.com/f/11001483/130_0809_09_z+eibach_spring_honda+itb_carbon_fiber .jpg

simmons0613
06-01-2011, 02:28 PM
Ok, I'm a little new to the velocity stack thing. Do you need a filter for them?

THEHMONGYAJ87
06-01-2011, 03:26 PM
it's been dyno proven bro.. i came from honda and most of the racers at the tracks uses a v-stack at the end of thier intakes, even turbo cars uses them for quick spool up. anyways i just did a iat (intake air temp) test with a my setup the xd and while the car was sitting it was at 111 degrees, whike driving the iat drops to 82-79 degrees. i did a test with my bro's xrs with a injen cold air intake and his was at 70-73 degrees sitting and 68-70 degrees whike driving. the outside temp is 70-73 degrees today.

---------- Post added at 01:23 PM ---------- Previous post was at 01:00 PM ----------

even the nissan guys uses this. heres a link to a bpi product review for the nissan forums. it's more effected at the track with no filter though.

http://www.sr20-forum.com/product-reviews/4231-product-review-bpi-flow-stack.html

couple from honda forums.

http://www.honda-tech.com/showthread.php?t=2231492

http://www.honda-tech.com/showthread.php?t=2646800

http://www.aspeedracing.com/showthread.php?t=6652

http://forums.clubrsx.com/showthread.php?t=511839

http://www.honda-tech.com/showthread.php?t=1591210

muscle forums

http://www.355nation.net/forum/engine-drivetrain/1784-bpi-intake-velocity-stack-dyno-info.html

---------- Post added at 01:26 PM ---------- Previous post was at 01:23 PM ----------

Ok, I'm a little new to the velocity stack thing. Do you need a filter for them?

on the tracks you don't have to run a filter but daily i would advise using a filter.

Resolve
06-02-2011, 02:00 PM
Simmons,

like said if doing daily then yes filter over Vstack (so you wont see the Vstack), but in race and drag cars they don't normally filter since they normally tear engines down and rebuild every race to every couple of races depending on group and type so dirt and debris is not a big issue like daily driven.

simmons0613
06-02-2011, 02:05 PM
oh ok, that makes sense. thanks resolve.

Resolve
06-02-2011, 03:10 PM
No problem. I am thinking about maybe giving it a try just for the heck of it

simmons0613
06-02-2011, 03:16 PM
couldnt you just modify our stock intake manifolds into a "velocity stack"?

THEHMONGYAJ87
06-02-2011, 06:36 PM
modifying our stock manifold would result in itb's (individual throttle bodies), this setup would sucks for our car because our motor won't rev high enough to benefit the itb's. You would want a intake manifold with built in velocity stacks like the jun auto intake manifold for the b18c.

Itb's

http://i181.photobucket.com/albums/x101/hueyang87/67b42eb0.jpg

Jun auto manifold

http://i181.photobucket.com/albums/x101/hueyang87/83df665a.jpg

---------- Post added at 04:36 PM ---------- Previous post was at 04:32 PM ----------

Here's something you might want to look at if you are thinking of making a cutom manifold for our motors. I know it's not scion related but this gives you the idea of design an intake manifold.

http://www.team-integra.net/forum/blogs/michaeldelaney/130-intake-manifold-tech-runner-size-calculations.html

JDMJim
06-02-2011, 10:01 PM
a one off manifold was made and it was too little too late. economy crashes and it's expensive. but dyno with the usual I-E( don't rememeber if there was a header and exhaust was axle back if that counts) was 145ish hp at the wheels. I was interested but by really couldn't afford that on unemployment. But no one would buy into it. Honestly, how many WANT to do turbo and actually did?

simmons0613
06-02-2011, 10:27 PM
well if the turbo was more affordable then I would be all over that. But like you said, things just got harder now that the economy crashed

THEHMONGYAJ87
06-02-2011, 10:36 PM
Yeah i dont think shops are going to look into producing performance products for our cars. they're more interested in hondas, mitsu's, subbies and mazda. I thought about getting a 06 rolla xrs before i bought the xd, but I wanted to be unique. i see too much rollas, tegs, subbies, lancers on the streets. and I wanted something that saves me gas and something i wouldn't mod alot compare to my integra so i got the xd. yet the mod bug keeps bitting me... lol.. thinking of going back to stock and selling the stack/filter combo.

simmons0613
06-02-2011, 10:39 PM
My moms friend is possibly wanting to sell his 1998 supra turbo sport edition, it is very temping to not go and blow all my money on selling the xD and getting that beast.

JDMJim
06-03-2011, 09:49 PM
you want something that gets good gas mileage and you can mod the hell out of? get a CRZ

THEHMONGYAJ87
06-03-2011, 11:36 PM
the crz looks like shit and not even comparable to the prius. If i get a hybrid, i would buy a prius. and i said something i wouldn't mod alot.. lol