all i heard was sssssssslllllllllllooooo o o o o o OOOOO O O O O O O O O

I want a quiet intake, how do I do that?

~80kpa on the highway up a long gentle slope is fcking annoying. Those carbon inline air boxes, helpful or not? I've seen FM suggest shoving the airbox full of egg foam, but I'm not doing that.

Right now I just 90 off the turbo into a 3" cone filter in front of the headlight. Was considering a inline air filer to try and quiet things down.

The intake on my new 2863 is vastly quieter than the giant sucking sound on my 2560. Pretty much all of the other bits are the same, so the only conclusion I can come up with is that it's the anti-surge compressor housing.

I'm not sure how helpful that is -- it's kind of expensive way to quiet things down. :)

http://www.codrus.com/miata/fm2r/intake20.jpg

--Ian

Haha, and here I was not wanting to spend $40 on the ebay plastic airbox doohicky! Results are results though :party:

My GTX2867R sings like a Peterbilt under a light to medium load because of the ported compressor housing. It hasn't gotten old yet. I like turbo noises.

Do it, it WORKS! I wrapped my air filter with just one layer of 1" foam, used a couple zip ties to keep it on there, sound went down 80%. No measureable/noticeable change in power or spool. Just a lot quieter.

Ah, alright. I'll give it a shot, not like it's hard to remove if I don't like it and I've got some foam from somewhere...

I loved the noise for a while, but driving the miata all the time means I hear them quite a lot :party:

go to a 4" intake tube.

Be sure to use closed cell foam* for maximum silencing.

The foam filters from Sears large shop vacs are a pretty good fit. Sears.com Cheaper in the store, but it might have just been on sale.


*Do not use closed cell foam. Duh.

Firewall intakes are on every 2nd n/a miata here in australia. Ive done them a bunch of times, including to turbo cars (smallest turbo on a miata ever incoming..)


https://fbcdn-sphotos-h-a.akamaihd.n...afd2eb5363c3ef

Its definately a noticeable thing in the cabin, totally bearable and pretty cool if you like turbo noises, but from in the cabin these intakes are about as loud as it gets.

Dann

I wrapped it with some egg crate foam, that is open cell right? It certainly worked, like a whole lot. AFR and O2 range seems the same, but it's rainy today and I can't much tell if it's much weaker.

Wouldn't having to step down to the tiny t3 from 4" cause an increase in airspeed? Isn't that what makes it squeal like a piggy now?

Another of those carbon air filters, thanks for the input Dann. Think I'll have to pass on one of those now, I want to be all stealthy and quiet.

What boost control is that?

AMS500 with custom (my made) actuator.

I'm not really concerned about the sound generated. I'm more concerned about rain getting in and if it actually makes a difference in regards to turbo intake temps

Had no water ingestion issues with my FM Randal carbon piece last fall. I was curious and after a heavy heavy thunderstorm popped the hood and checked the inside of my airbox, it was dry. The actual Randal carbon thinggy looked like it had a fine mist in it, but nothing was soaked.

Dann, Elior or someone please post links to manufacturers of those tube airbox filter things so I can read more stuff about them. I've wanted to do this for quite some time.

I've found ONE from a company in Canada called PRM Racing but they are assholes and won't give me dimensional drawings of anything in their product line. How the hell am I supposed to figure out what to order if I don't know what will fit?

Carbon Air Filter

Also:
https://www.miataturbo.net/build-thr...e3/#post709118

Yep, I have that same K&N cone thingus sitting in my garage from when we discussed this previously. Thanks H :bigtu:

Perfect. I think I'll get this done at the same time as my FMIC piping re-routing. :makeout: