Sound levels w/ turbo+no cat+enthuza? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to   Members

Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

LinkBack Thread Tools Search this Thread
Old 04-26-2009, 07:40 PM   #21
Tour de Franzia
iTrader: (6)
hustler's Avatar
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351

Originally Posted by zoomin View Post
A high flow cat will not inhibit power enough to justify not having piece of mind from cops and keeping your hearing.
I'd love to see some real data on this...but none exists on this forum.

Originally Posted by zoomin View Post
Why not just run a proper high flow cat?
Jason/Enthuza claims they saw a negligible drop in output on a V8 with the cats he uses...but too many confounding variables exist.

Originally Posted by JayL View Post
Would a decent sized resonator take enough off or would a cat be pretty much the only option to bring it down to a comfortable sound level?
from what I've read, and what I did with the turbo vw, resonators only stop the popping noises and "rasp." It basically made the car sound boring and OEM. I have no resonator and think my car sounds pretty coo / mature / respectable.

bigger mufflers seem to be the right answer for making it quiet.
hustler is offline   Reply With Quote
Old 04-26-2009, 07:52 PM   #22
Elite Member
Thread Starter
iTrader: (7)
Join Date: Jan 2008
Location: Knoxville, TN
Posts: 2,120
Total Cats: 44

That seems like under 94 dB, ill just have to test it at the next autox after i put my car back together haha.
flier129 is offline   Reply With Quote
Old 04-26-2009, 08:37 PM   #23
Elite Member
iTrader: (13)
Join Date: Nov 2006
Location: Tigard, Oregon
Posts: 3,908
Total Cats: 0

Originally Posted by flier129 View Post
Im running stock header to a 2.5" text pipe to Enthuza's 2.5" turbo exhaust. Was wondering if anyone with a test pipe + enthuza catback with a turbo has any idea on how loud they're car is.

I'll be running a gt2560r with FM's manifold and 2.5" downpipe.

When you put the turbo in, the system you already have it will quiet down a bunch. A turbo exhaust without a turbo is VERY loud. That's what you are currently running. No wonder you were loud car of the day. Add the turbo it will mellow things out considerably.

On Enthuza's site and at Goodwin I remember this being discussed. A turbo exhaust without a turbo is loud. Not a good loud, an annoying raspy loud.
cueball1 is offline   Reply With Quote
Old 04-28-2009, 09:46 AM   #24
I haz no trubo
iTrader: (2)
Oscar's Avatar
Join Date: Jan 2007
Location: Bolton, UK
Posts: 3,021
Total Cats: 114

while we're whoring out exhaust vids:

stainless header, Enthuza stainless N/A racer exhaust w/ resonated midpipe, resonated testpipe and Borla muffler. Resonators are ANSA/Silverline glasspacks.
Oscar is offline   Reply With Quote
Old 05-08-2009, 03:15 PM   #25
Elite Member
iTrader: (8)
Join Date: Oct 2007
Location: Dallas
Posts: 1,841
Total Cats: 0

I had a 3" enthuza and a 3" silverline reasonator and at idle it sounded not much louder than stock. My chevy truck is louder with a turbo muffler.

And when driving it was perfect. No worries of cops, you can hear the radio, spool was awsome!, and everyone around you could tell you where not average. It was not bumble bee, it was quality bass and perfect.
Toddcod is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 06:00 PM.