air intake help

[legy the legacy]

I have a 1996 legacy L sedan, and I posted a thread on nasioc but no good replys. So my question is what kind of air intake you have and how did you set it up? I cant find any to buy other than a $200 weapon r, can i buy one from an impreza and put it on my car? and does a snorkus delete actually help ?

[mycargoesvroom]

Get an eBay intake and create a hybrid like this:
https://sl-i.net/FORUM/images/imported/2011/07/intake-1.jpg

IMHO it's the only way to go.

[legy the legacy]

did you have to drill any extra holes?

[mycargoesvroom]

Nope. Make sure you buy one with 3 fittings on the tubing, and pick up some rubber or silicone hoses to elongate the tubing so everything fits.

Edit: Here's a good DIY viewtopic.php?t=11765 (https://sl-i.net/FORUM/viewtopic.php?t=11765)

[Baddog]

Legy. Your car looks like mine used to. Haha

[legy the legacy]

right on ill prob do that then, thanks.

[sorapolc]

I still don't understand the hybrid method. so you're putting a cone filter into the stock box near the fender? from the link John gave, we can keep the snorkus as is right? it'll still work the same?

[xoSubieLegacyxo]

I still don't understand the hybrid method. so you're putting a cone filter into the stock box near the fender? from the link John gave, we can keep the snorkus as is right? it'll still work the same?


I used the stock airbox (1) with a K&N drop-in filter

Go to AutoZone and buy a K&N "replacement" filter for your car. Keep the stock airbox, snorkus, and maf, and install your ebay SRI intake with an additonal coupler.

[mycargoesvroom]

I still don't understand the hybrid method. so you're putting a cone filter into the stock box near the fender? from the link John gave, we can keep the snorkus as is right? it'll still work the same?

The only thing being replaced is the ribbed tubing between the Throttle body and stock air box. You can keep your stock paper filter if you want, in fact I would recommend it because K&N filters are know to gunk up MAF's from time to time.

[sorapolc]

ahh... makes it much more easier to do myself. cuz the other DIY thread seems soooo hard. with the cutting of the snorkus and all. how much HP adds to the car? 7? 10?

[Wiscon_Mark]

Probably none. I never noticed any difference between cone filter, hybrid intake, or stock intake setups in terms of performance.

[sorapolc]

really? on the cosmo racing site it mentions 7 HP. and I went to autozone and saw some other air intake kits and they go up to 18 HPs.

[mycargoesvroom]

*Up to* being the key phrase there. That means they've accomplished 18hp on 1 car. It was probably brand new, and probably a v8.

[Wiscon_Mark]

really? on the cosmo racing site it mentions 7 HP. and I went to autozone and saw some other air intake kits and they go up to 18 HPs.

They're manipulating statistics to achieve good marketing. Almost every company does it where they can. If you're running a well modified engine that requires all that extra airflow, yeah , it'll make a difference, but slapping one of those on a stock engine probably won't achieve any gains.

-or-

It'll only achieve gains at the peak HP spot on your engine, and you'll never notice it because the difference is so negligable.

Either way, intake isn't really the first thing to do if you want to start making dents in your engine's overall power.

Remember that 165 HP is only achieved at one singular RPM, it's lower than that across the entire rest of the power range. Modifications like cams open the valves up wider, giving your a much more noticeable difference in power across a wider RPM range, boosting the whole range (depending on the design of the cams of course). An aftermarket intake vs. stock probably makes no difference below 4,000 RPMs, even at WOT because you're not going to run into a choke point with less airflow.

[sorapolc]

wow thanks mark. you're statement's gonna save me time and money. so no need to bother on that then!

[Wiscon_Mark]

For similar money to a name brand intake - a lightweight crank pulley would give you some good gains across the RPM range.

[sorapolc]

hmm.. that's new to me. any suggestion on brand and what pieces to buy? there's 3 or 4 total pulleys correct?

[Wiscon_Mark]

Generally the crank pulley is the only one to get if you're going lightweight - the other pulleys are already so small and light...

You might be thinking of underdrive pulleys. I don't recommend underdriving your A/C, power steering or alternator unless it's not your Daily Driver and your tracking it or something.

There are quite a few options out there.

[sorapolc]

i tried searching about the underdrive pulleys but couldn't find anything. what would it do to the A/C, power steering or alternator? well, i'm not a daily driver, due to living in NY, I ride my fixie bike more. but I also don't want to do much to the engine due to that I will eventually have to sell the car in a year or 2 (really don't want to). but for knowledge's sake and for future mods (i will keep on driving subarus) what would happen to those 3 you mentioned?

as for the crankshaft pulley, between cobb tuning, Perrin, or grimmspeed, which one would u recommend?

[Wiscon_Mark]

Having never had experience with one, I wouldn't make a recommendation. You should start a new thread about it though, I'm sure people will have some input.

Underdriving something like an alternator basically means that per engine rev, the alternator turns fewer times than in the stock configuration, meaning it uses less power from the engine, but also doesn't charge the battery as quickly. It's achieved by using smaller pulleys that turn the belts less per RPM. It would also affect the performance of your power steering and air conditioning.