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Old 05-14-2009, 02:33 AM   #1
WickedRS
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Default Who wants a gravelsport style intake?

Whatís up GC8 and Impreza enthusiasts, you havenít experienced an intake until this intake is installed on your RS. I have successfully built one for my 02 with a 05 WRX front end conversion back to stock except for the intake. Amazing low end torque gains might be better than stock and a great pull all the way to red line. It sounds normal at cruising but screams at wide open throttle, and 3rd gear is sick. I am dedicated to building them if there is enough interest. I have read similar posts of others who want to make this available to you but do not have the time. I have the time and want to bring these to the community. It appeared at one time people really desired one wanted to see if this is still true.

This is for MAP, however if a member in the Pittsburgh area wants to donate their car with MAF for a day or 2, maybe a weekend I will figure it out. So MAF owners can experience this too. Send me a PM and we can work something out.

A little background of me; I have been in the custom industry for 10 years and fabrication has been a tremendous part of my work. I am lead tech at a custom shop and work for myself as well out of my garage. I do not express that I am an expert but can hold my own. I have owned my RS since late í03 and gone threw my share of mods and excited about this one the most.

NOTICE: I am creating this thread/offer for those who are seriously interested in a gravelsport style intake. I will not be calling it a Gravelsport since that was Seanís creation. I am not expecting those of you to debate pros and cons to the intake or other intakes. Everyone knows that you can buy a cheap intake on ebay, or a ganzflow style as well. IF YOU HAVE AN OPINION I will be the first to respect it but if it is NEGATIVE please do not post. Send me a PM if you want.


As far as cost is concerned I feel a fair price would be $250. However, if there is enough interest, for the first 15 people I will ship them for free. Or possibly a group buy.


Below is a picture of the original and one of the one on my car.



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Old 05-14-2009, 07:36 AM   #2
cmiovino
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I'm interested in the MAF build. Any your in Pittsburgh too?
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Old 05-14-2009, 08:55 AM   #3
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im in.
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Old 05-14-2009, 10:11 AM   #4
Bluefoton
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Accepting only positive opinions, but rejecting negative ones defeats the purpose of hearing "opinions", no?

Good work on bringing it back to life though.
As you have seemed to use it for quite a while, could you share a bit more info?
What kind of filter did you use?
Did you have to change it more often due to water soaking? (I assume you had a WRX hood scoop on it)?
Wouldn't a design where the filter is vertical (as in OEM) sitting in an open-top box be better as i'd allow for a water drain channel?
Did you have a chance to dyno it? Earlier reports actually suggested a loss of low-end torque..

Cheers, and good luck!
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Old 05-14-2009, 11:34 AM   #5
Un0RiGiNaL
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looks sweet--- any problems with MAF sensor?

gains? whats different about this other than the looks
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Old 05-14-2009, 12:04 PM   #6
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Id be willing to let my go be used but its in Anchorage Ak and ur back east. I am interested in an intake tho. Trying to get every little bit out of it before I go the AFI route. Let us know prices please, and hope someone with a maf car gets to you
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Old 05-14-2009, 03:14 PM   #7
jordan s
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i'd be interested in a MAF one if i saw some dyno charts and MAF readings.
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Old 05-14-2009, 06:00 PM   #8
Un0RiGiNaL
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what if ur car had a hoodscoop? hydrolock much lol
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Old 05-14-2009, 06:37 PM   #9
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250 bones? i can do cams for less than this intake. maybe if you have dyno proven results than i'd buy it but unless price comes down this is a waste.

and you wouldnt hydrolock with this.
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Old 05-14-2009, 11:31 PM   #10
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I can only suggest that before selling a product, build a couple prototypes first.

Test pipe length and the usefulness of an inline resonator. I've been toying with my stock intake some and have found that the engine is quite sensitive to what's attacked before the throttle body. For example, the plenum size is about half the size it should be. Without the stock inline resonator (air box), the air/fuel ratio becomes inconsistent. When the stock box is put back on, air/fuel numbers even out. I would suggest you mimic at least partially this as the stock plenum doesn't seem to be enough of a size to provide consistent numbers. Pipe length will also be important. This will be a tuning aid and can have rather significant effects on the power band and VE. The stock intake also adds 2 other resonators and a J tube, some for sound control but also to aid low/mid range torque. I haven't done enough testing myself, but I've toyed around with a few setups and logged to see that you can mess up a good thing that is stock. The only major fault of stock is that it doesn't pull in cold air.

http://www.dinamoto.it/DINAMOTO/on-l...suonatore.html

http://www.team-integra.net/forum/di...g+Common+Topic


I'd have no problem plopping down money on a well engineered product. It doesn't just have to look pretty. It has to function as best as possible too. Do research, do testing, find the best design.

The MAF/MAP options should be a pretty easy matter. MAF just needs a specific section of pipe. Provide a straight section of correct diameter and have a MAF section on it. Any MAP based car will simply have a sensor hole cover or simply a holeless adapter section in it's place. The rest of the intake should be universal.

You'll have to figure out the water issue. Note that you aren't bound to the stock filter geometry, so you could simply build a different box that could sit differently and allow for a chamber with drainage prior to the filter.

$250 isn't a bad price. Most intakes will be around the $300 range. Anything that can ensure ambient air in and any gains in VE (or at least no loss from stock) would be worth something and around 10 ft-lb across the board. The VE is tricky because colder air in means more power already. You can still make more power but have lower VE from a poor design that gets hidden from the simple temp gain. It can be seen in the torque curve though if you overlay the shape.

It's nice to see a fabricator with some interest in this. Just engineer it well. That's all I can ask.
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Old 05-15-2009, 12:39 PM   #11
Bluefoton
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Old 05-15-2009, 12:58 PM   #12
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IBVendorStatusNeededToSellAndDisclosePrices
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Old 05-15-2009, 05:05 PM   #13
2.5i
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Quote:
Originally Posted by YourMother'sLover View Post
IBVendorStatusNeededToSellAndDisclosePrices
LOL I'm surprised the Mods aren't all over this.

Great looking intake, but what are the dyno gains?
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Old 05-15-2009, 05:40 PM   #14
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Probably because he doesn't yet have a product to sell.
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Old 05-15-2009, 05:47 PM   #15
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Subscribed
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Old 05-16-2009, 01:47 AM   #16
bcware
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What do you do about the hydrolocking engine problem? I'm assuming this is to be used with a vented hood.
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Old 05-16-2009, 11:30 PM   #17
WickedRS
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No hydrolocking problem since I have been driving it through the rain many times and this is Pittsburghs rainy season. Yes I need vendor status before producing these and selling them to the community. The design is exactly as the first one but with a slightly longer pipe track. I have gone back and forth with the stock intake and there is significant gains and difference not just a different sound. The thread on rs25.com has a lot of attention, and the videos for the sound. But I will post them on here too, amateur vids and the camera moves a couple of times be patient wasn't trying to capture myself.
[youtube]2zFdFZuvdu8[/youtube]

[youtube]nLltzr3r1pg[/youtube]
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Old 05-16-2009, 11:30 PM   #18
WickedRS
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so it doesnt work like that on nasioc???
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Old 05-16-2009, 11:31 PM   #19
WickedRS
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Old 05-16-2009, 11:32 PM   #20
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Quote:
Originally Posted by WickedRS View Post
so it doesnt work like that on nasioc???
just post the whole youtube link
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Old 05-17-2009, 01:07 AM   #21
Subarudave09
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could u PM me the spec and drawings of this cuz i just wanna build my own with a touch of my style of fiber glass or use aluminum with some fatt TIGS PLEASE promise i will not copy or take ur idea!!!!
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Old 05-17-2009, 01:26 AM   #22
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Got a Tactrix cable?

Perceivable gains and real gains are two different things. One perception is a gain in upper rpm power due to a real loss of midrange power. I thought this initially when I was fiddling with my intake setup. Even when I went back to stock, I couldn't really perceive the gains stock gave. I couldn't say if stock or the custom setup had more real efficiency across the board. When I logged and did the numbers, things became clear. There was overall gains from the cooler intake temps but there was a large (like 10 ft-lb) loss in the midrange. The raw gain in overall power due to the cool air hid this fact. It felt more powerful, but it was a worse design overall because midrange VE dropped. The shape of the power curve will indicate VE. The raw gains in power will be there just from the cold intake air. The hard part is to at least maintain the same curve (VE) if not improve upon it.

The only other thing I'm curious about is if air/fuel is consistent. I know the stock torque box promotes consistent air/fuel readings. I just don't know if just a section of tube will do the same. The car won't noticeably drive bad with the air/fuel wandering around.

I'm not trying to mock or dis your product. I simply want to see it end up as a truly functional (not just athetically), quality product, something as good as it can be. I'm happy to pay extra for good engineering.
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Old 05-17-2009, 02:15 AM   #23
Bluefoton
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For the heck of it, i just removed the outer half of the filter housing and the rest of the intake tubing. Left basicaly the TB, the front of the filter housing, and the filter (which I attached to the box). it's loud AS HELL... won't do it
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Old 05-17-2009, 02:26 AM   #24
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inb4williaty
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Old 05-17-2009, 04:10 AM   #25
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Quote:
Originally Posted by Mr_Snips View Post
250 bones? i can do cams for less than this intake. maybe if you have dyno proven results than i'd buy it but unless price comes down this is a waste.

and you wouldnt hydrolock with this.
What's the big deal? If there's people willing to pay $250 then that's what it'll sell for. Do you knock everything you don't agree with? People pay $300 for brand name cold air intakes and what not, so what.

And I'd like to see you do cams for less than $250.
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