Cold air intake through hood scoop?

[marklj]

My buddy is giving me his stock '02 wrx hood scoop which I will be installing tomorrow on my '03 legacy. I was interested in knowing if it would be at all beneficial to somehow rig a cold air intake to suck in the air from the scoop. Would drawing in the cold air from the scoop be more beneficial (as far as HP gained) than a short ram next to the fender?

[1-3-2-4]

I think this has already been done I think it's called gravelsports intake or something of that nature..

you pretty much have an open intake of a shape of a TMIC and a air filter over it.

[marklj]

Thanks!
I just did some research on the gravel sports intake and might be something I'd be interested in (although a bit pricey). However, I couldn't find a single site online that actually sold them...

I wonder how difficult it would be to build one.

[decke48]

the gravelsports intake is for the map 2.5rs. im not sure how it fits under the legacy hood.
http://www.subarureview.com/images/814.jpg
just dont be this idiot
http://img72.imageshack.us/img72/6682/intakehy8.jpg

[1-3-2-4]

Wow ^ that's tacky as hell!

[)2edline]

hahahha, WHAT IS THAT.

I wish i had a gravelsport =[

[anothernord]

the gravelsports intake is for the map 2.5rs. im not sure how it fits under the legacy hood.
https://sl-i.net/FORUM/
just dont be this idiot
https://sl-i.net/FORUM/

It makes me shudder to see such a distasteful mod done to a Subaru...

I would imagine that the Gravelsports style intake would not be terribly difficult to fabricate yourself, provided that you have the materials and tools.

[marklj]

wouldnt the MAF be pretty simple to rig? just attach it into a hole in either the tubing or the bottom of the filter unit...?

[)2edline]

Oh yeah, i should have included this before - Gravelsports intakes are OLD. you will not find these sold online except by rare members that are parting out. Fabrication is difficult in accounting for MAF Sensors. Search RS25 and other subie forums for a rare gravelsports to pop up.

they are costly.

[anothernord]

Compared to a hybrid CAI setup or short ram intake, the gains will not be much greater with the Gravelsports intake. You also have to worry more about water and debris getting onto the filter.

It would still be fun project to fabricate one though.

[1-3-2-4]

water should not be an issue

[Huffer]

wouldnt the MAF be pretty simple to rig? just attach it into a hole in either the tubing or the bottom of the filter unit...?

You don't have a MAF. If you are looking at using the gravelsports style intake then you have a MAP sensor for the air intake. 00-04 BE/BH.

[Huffer]

Oh yeah, i should have included this before - Gravelsports intakes are OLD. you will not find these sold online except by rare members that are parting out. Fabrication is difficult in accounting for MAF Sensors. Search RS25 and other subie forums for a rare gravelsports to pop up.

they are costly.

See above.

[marklj]

I was speaking to a friend about the MAP sensor and he said it could be disabled by reprogramming the computer to stop reading from it. Is this true? and if so, would that cause any problems?

It's becoming less and less likely that I would be doing this. I am fairly certain that i could build this beast if i knew exactly how the unit all works. But I'm a little confused about how the intake/vacuum hoses/MAP work together... If anyone has a some information, or a link to direct me to that would be great!

[1-3-2-4]

I was speaking to a friend about the MAP sensor and he said it could be disabled by reprogramming the computer to stop reading from it. Is this true? and if so, would that cause any problems?

It's becoming less and less likely that I would be doing this. I am fairly certain that i could build this beast if i knew exactly how the unit all works. But I'm a little confused about how the intake/vacuum hoses/MAP work together... If anyone has a some information, or a link to direct me to that would be great!


Your MAP sensor tells the ECU how rich/lean the car needs to run.. in other words it would cause issues.

[Huffer]

I was speaking to a friend about the MAP sensor and he said it could be disabled by reprogramming the computer to stop reading from it. Is this true? and if so, would that cause any problems?

Your friend knows nothing about your model of Subaru then...

how does the guy with the stupid ass intake up there open his hood?

[Okin DaVanh]

I was speaking to a friend about the MAP sensor and he said it could be disabled by reprogramming the computer to stop reading from it. Is this true? and if so, would that cause any problems?

Your friend knows nothing about your model of Subaru then...

...and therefore he's not your friend. :smt023 j/k


There was another member here that was attempting to make one for his BK.

[jey]

Sounds like a lot of work for little to no benefit. I think you need to extend your maf/map signal wires too since they aren't long enough to accomodate for such a relocation.

[rougeben83]

The only sensor on your intake box/piping is the air temp sensor. Your MAP sensor is on the manifold itself (it's different from some years of RS). You don't need to change any sensor/wiring if you go with the gravelsports design.

You can make one yourself, the gravelsports intake started out with one guy taking half of his filter box, gluing a 45deg-bend ABS pipe on it from Home Depot, and cutting enough of the other half of the box to have something for the clips to grab onto and hold the panel filter in place.

[marklj]

You can make one yourself, the gravelsports intake started out with one guy taking half of his filter box, gluing a 45deg-bend ABS pipe on it from Home Depot, and cutting enough of the other half of the box to have something for the clips to grab onto and hold the panel filter in place.

Would something like this have similar benefits are a cold air intake? If so it would be a heckofa lot cheaper to impement than a short ram or cold air.

My head is swimming with ideas... :toothy7:

[ScaryFatKidGT]

the gravelsports intake is for the map 2.5rs. im not sure how it fits under the legacy hood.
https://sl-i.net/FORUM/
just dont be this idiot
https://sl-i.net/FORUM/

hey ease off maybe this guy needs to take his subi through 3 feet of water and its a snorkle :)

i saw someone on here make there own intake from like home-depot just like that under the thread title "ram air subaru" or something like that but honestly i dont think you would get much more HP than a full CAI unless u sealed around the scoop to make it push into the intake

[rougeben83]

You can make one yourself, the gravelsports intake started out with one guy taking half of his filter box, gluing a 45deg-bend ABS pipe on it from Home Depot, and cutting enough of the other half of the box to have something for the clips to grab onto and hold the panel filter in place.

Would something like this have similar benefits are a cold air intake? If so it would be a heckofa lot cheaper to impement than a short ram or cold air.

My head is swimming with ideas... :toothy7:

If you have that hoodscoop installed, yes. The biggest thing people report is the increase in throttle response since there's way less intake tubing.

[marklj]

If you have that hoodscoop installed, yes. The biggest thing people report is the increase in throttle response since there's way less intake tubing.

I've been researching on forums a little bit about the length of the tubing and from what I've been reading it sounds like having a little bit of tubing (but not too much) actually benefits tow-end torque. This is why the gravelsport intake wraps around the side of itself (see pic below). Would buying some big rubber tubing and doing a similar type of loop-around help?

https://sl-i.net/FORUM/

[hellaGT]

how does the guy with the stupid ass intake up there open his hood?
This is a good question... Probably has to take off that cone every time. I am also assuming that his (or her) subie is amphibious :fish: :smt082

[ScaryFatKidGT]

that car can go through ANY body of water as long as is it doesn't rain lol

[xXGTBspecXx]

how does the guy with the stupid ass intake up there open his hood?
takes the filter off duhh! lol at least that wasnt a permenant mod ,he just stuck the pipe thru the hood vent.

[xXGTBspecXx]

If you have that hoodscoop installed, yes. The biggest thing people report is the increase in throttle response since there's way less intake tubing.

I've been researching on forums a little bit about the length of the tubing and from what I've been reading it sounds like having a little bit of tubing (but not too much) actually benefits tow-end torque. This is why the gravelsport intake wraps around the side of itself (see pic below). Would buying some big rubber tubing and doing a similar type of loop-around help?

https://sl-i.net/FORUM/
big rubber tubing would help if u wanted to make a huge heatsoak. they have short rams and CAI for a reason.. they work. just buy a intake off ebay and be happy.

[rougeben83]

If you have that hoodscoop installed, yes. The biggest thing people report is the increase in throttle response since there's way less intake tubing.

I've been researching on forums a little bit about the length of the tubing and from what I've been reading it sounds like having a little bit of tubing (but not too much) actually benefits tow-end torque. This is why the gravelsport intake wraps around the side of itself (see pic below). Would buying some big rubber tubing and doing a similar type of loop-around help?

https://sl-i.net/FORUM/

I had a CAI when I was n/a...honestly, I never noticed the "torquebox" effect (you supposedly loose torque near idle when you ditch the stock airbox), just the extra growl at the other end. I think people tend to over analyze such simple modifications on the car. Modifying a stock airbox for a hoodscoop intake is easy enough and getting a spare airbox to experiment with is cheap enough, that you can afford to switch back to whatever if it doesn't work out for you.

[marklj]

big rubber tubing would help if u wanted to make a huge heatsoak. they have short rams and CAI for a reason.. they work. just buy a intake off ebay and be happy.

So what you're saying is the black rubber tubing would do more harm than good due to it soaking in a lot of heat? what if the the tube was wrapped in something reflective like aluminum foil? I know that sounds pretty ghetto, but im really just brainstorming on possibilities to make this work with the best results possible (while not buying an expensive unit).

[Huffer]

Got a question for you... is this even worth the trouble of cutting up your hood to put a WRX scoop on?

[marklj]

Got a question for you... is this even worth the trouble of cutting up your hood to put a WRX scoop on?

The scoop was going on no matter what. I was just trying this would be a great way to make it actually functional.

[1-3-2-4]

Got a question for you... is this even worth the trouble of cutting up your hood to put a WRX scoop on?

The scoop was going on no matter what. I was just trying this would be a great way to make it actually functional.

i always thought a wrx hood on a legacy looked out of place but that's just me...

but im glad now that Subaru is making them all look alike..

I've heard rumors that the legacy stock hood did a better job then a wrx hood as far as cooling with a TMIC but don't know how true that is or not.

[decke48]

legacy scoop has enough flow to support up to 340hp stock and with the ARC 38mm insert will support up to 420hp

[ScaryFatKidGT]

big rubber tubing would help if u wanted to make a huge heatsoak. they have short rams and CAI for a reason.. they work. just buy a intake off ebay and be happy.

So what you're saying is the black rubber tubing would do more harm than good due to it soaking in a lot of heat? what if the the tube was wrapped in something reflective like aluminum foil? I know that sounds pretty ghetto, but im really just brainstorming on possibilities to make this work with the best results possible (while not buying an expensive unit).

PVC pipe? or something?

[ScaryFatKidGT]

legacy scoop has enough flow to support up to 340hp stock and with the ARC 38mm insert will support up to 420hp

hmmmmm i would like that leggy :smt025