I have a completely stock IX and am looking to mod. I am worried about the noise of an exhaust and intake. At the suggestion of another forum member I removed the snorkel and stock airbox cover. I left the OEM panel filter in for the ride home tonight, here are my observations:

-Under 3k RPM, no noise difference.

-Crusing on highway no noise difference.

-Only increased 'noise' (noise is in quotes because I actually like the sound and it's more like music to my ears since it isn't too intrusive and not present all the time.) was after 3k RPM and while accelerating. Any RPM over 3k, but holding steady, was no difference in intake noise than stock.

Based on my 'test' is it realistic to think that a cone filter (No intake, just cone filter on top of stock intake w/ adapter) will produce the same sound?

 

Stay away from those cone filters. Everyone says they idle fine when you get a tune for them, but I still have my reservations. I think they are junk because of the metal tubing they use that replaces the stock rubber accordian-style intake tude. This rubber acts as an insulator that prevents the MAS from picking up noise from the compressor bypass valve, where the metal actually increases the echo, which throws your MAS readings off.

If you want to modify, start off with the Samco induction hose and a Pipercross panel filter for the intake. Keep the stock airbox in place.

you'll get all the "benifitial noise" of an intake without the "annoying noise" that they make (hearing the compressor bypass valve like a BOV every time you get off the gas - seriously annoying).

 

thx for the suggestions 90GSX, but did you read the last sentence in my post?

I will not be using a full on intake, just a cone filter replacing the stock intake box. This cone filter still uses the rubber intake hose:

http://www.amsperformance.com/store/...roducts_id=170

Does a full intake sound louder than the open OEM panel filter I ran tonight or just a cone filter stuck on the stock intake?

 

With what you posted, you'll hear the bypass valve (the BOV noise).

I've used one before. There's no noticeable gain as far as power goes. Definitely nothing like a TBE, an MBC, or even a simple tune.

 

The cone plus metal plumbing will be loudest, the cone and stock plumbing with no stock airbox will be the second loudest, and a simple drop-in filter will be the "quietest" of the three. I'd go with the drop-in (Pipercross) because it will keep you from hearing the annoying BOV sound all the time but still let you hear the turbo spool up like you are saying you want. They're also washable, and Pipercross actually makes the Ralliart filters that are way overpriced.

 

I agree with your order of loudest, but I really want to know if what I heard tonight (stock filter with no snorkel or top cover) is similar to cone filter and stock intake.

I've read buscher's comments as well as road-tests w/ wideband logging and feel the cone filter is worth it for my planned mods in the end, so long as it's not too loud for me.

 

Why not just get this then?

It'll give you the sound you're looking for without sacrificing torque.

 

The Blitz Cover is useless... $125 for nothing. Just take your lid off, same thing.

A cone filter and hard pipe is best, and loudest, and will need a tune to idle properly.

Also I fail to see how a cone filter would "sacrifice torque"... if you're getting tuned, there's no reason not to get a cone. My ONLY concern is heat... if you're road racing on a hot day, then a cone could do more harm than good... but for most people's daily driving & drag racing, a cone is fine

 

Open element intakes on Evos are one of those hot topic everyone has a personal opinion and experience about.

IMO, if you like to really hear your turbo in boost and the DV sound, do it. Intakes aren't that expensive (Buschur's Cone Filter is $80), and why it may not yield an incredible gain of power, they do sound nice. I didn't realize how loud my turbo could be until I had a buddy in another evo with an intake scream past me on the street. Then I knew I wanted one.

(Just don't pump the gas pedal back and forth to show off your newly acquired BOV sound. lol)

 

One last thing:

DO NOT FORGET TO GET THE INTAKE TUNED.

 

Loudest? Yes.

Best? No.


As for the torque, I think I might hve brain-farted. N/A's are the ones who generally loose torque with this type of setup. Not sure if the Evo would or not. I've had a hard intake on an Evo before and didn't care for it at all. In fact, I was pretty pissed off that I cracked my factory airbox while removing it, preventing me from being able to return to the stock intake without buying a new one from SATAN.

I wouldn't bother with getting an intake. So much more gain can be found elsewhere, and the stock airbox has proven itself to be fine all the way to the upper extremities of the stock based turbos (FP Green).

 

I have had all three.


The Blitz cover, while fine for a stock car raises IAT pretty high since you are sucking in air from the hottest part of the engine bay . It increases the intake song marginally.

The stock intake box drilled or with the lid cut open is a decent option.



I currently have the buschur cone with the stock intake pipe. Sounds good, works fine. Get that.

 

So the Blitz cover raises intake temps because it pulls hot air from the engine bay but a cone filter does not?

 

Not nearly to the same degree. You're welcome to buy my induction cover and see for yourself.

 

Buschur filter will not require a tune for it. NJ on the Ecuflash board pretty much documented very little change from switching too it. I have no probs either. A good option (IMO) is to get the Buschur Filter and use the lid with snorkel. Will get a little cooler air into the filter from outside


edit - something else to keep in mind with a cone filter, frees up some room under the hood too.

SQ