Firewall intake??? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 03-18-2015, 02:35 PM   #21
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,813
Total Cats: 1,780
Default

all i heard was sssssssslllllllllllooooo o o o o o OOOOO O O O O O O O O
Braineack is online now   Reply With Quote
Old 03-18-2015, 02:44 PM   #22
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

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.
deezums is offline   Reply With Quote
Old 03-18-2015, 03:28 PM   #23
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 3,875
Total Cats: 344
Default

Quote:
Originally Posted by deezums View Post
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.



--Ian
codrus is offline   Reply With Quote
Old 03-18-2015, 03:34 PM   #24
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

Haha, and here I was not wanting to spend $40 on the ebay plastic airbox doohicky! Results are results though
deezums is offline   Reply With Quote
Old 03-18-2015, 04:41 PM   #25
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,633
Total Cats: 1,559
Default

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.
sixshooter is offline   Reply With Quote
Old 03-18-2015, 05:04 PM   #26
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,793
Total Cats: 247
Default

Quote:
Originally Posted by deezums View Post
I want a quiet intake, how do I do that?.... I've seen FM suggest shoving the airbox full of egg foam, but I'm not doing that.....
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.
patsmx5 is offline   Reply With Quote
Old 03-18-2015, 05:17 PM   #27
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

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
deezums is offline   Reply With Quote
Old 03-18-2015, 06:42 PM   #28
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,813
Total Cats: 1,780
Default

Quote:
Originally Posted by deezums View Post
Haha, and here I was not wanting to spend $40 on the ebay plastic airbox doohicky! Results are results though
go to a 4" intake tube.
Braineack is online now   Reply With Quote
Old 03-18-2015, 07:12 PM   #29
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

Quote:
Originally Posted by deezums View Post
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...
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.
rleete is offline   Reply With Quote
Old 03-18-2015, 09:06 PM   #30
Elite Member
 
Join Date: Apr 2010
Location: Newcastle, Australia
Posts: 2,638
Total Cats: 25
Default

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..)




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
nitrodann is offline   Reply With Quote
Old 03-18-2015, 09:51 PM   #31
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

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.
deezums is offline   Reply With Quote
Old 03-19-2015, 05:20 AM   #32
Senior Member
 
Join Date: Nov 2012
Location: Israel
Posts: 543
Total Cats: -298
Default

Attached Thumbnails
Firewall intake???-9eee4d09-6034-42aa-bfac-81443d237c50.jpg  
elior77 is offline   Reply With Quote
Old 03-19-2015, 06:21 AM   #33
Elite Member
 
Join Date: Apr 2010
Location: Newcastle, Australia
Posts: 2,638
Total Cats: 25
Default

What boost control is that?
nitrodann is offline   Reply With Quote
Old 03-19-2015, 06:29 AM   #34
Senior Member
 
Join Date: Nov 2012
Location: Israel
Posts: 543
Total Cats: -298
Default

AMS500 with custom (my made) actuator.
elior77 is offline   Reply With Quote
Old 03-19-2015, 11:49 AM   #35
Junior Member
iTrader: (1)
 
Join Date: Dec 2014
Posts: 66
Total Cats: -7
Default

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
impulsive.ca is offline   Reply With Quote
Old 03-19-2015, 01:34 PM   #36
Goin Innnnn!!!
iTrader: (7)
 
Chooofoojoo's Avatar
 
Join Date: May 2014
Location: Denver, Co.
Posts: 460
Total Cats: 40
Default

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.
Chooofoojoo is offline   Reply With Quote
Old 03-19-2015, 02:31 PM   #37
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

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 ******** 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?
EO2K is offline   Reply With Quote
Old 03-19-2015, 02:44 PM   #38
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,008
Total Cats: 583
Default

hornetball is offline   Reply With Quote
Old 03-19-2015, 03:15 PM   #39
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Quote:
Originally Posted by hornetball View Post
Yep, I have that same K&N cone thingus sitting in my garage from when we discussed this previously. Thanks H
EO2K is offline   Reply With Quote
Old 03-19-2015, 03:53 PM   #40
Junior Member
iTrader: (1)
 
Join Date: Dec 2014
Posts: 66
Total Cats: -7
Default

Quote:
Originally Posted by Chooofoojoo View Post
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.
Perfect. I think I'll get this done at the same time as my FMIC piping re-routing.
impulsive.ca is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
01-05 Fab9 PNP COPs (used) FrankB Miata parts for sale/trade 6 09-30-2015 12:48 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:46 AM.