If you've hollowed out your cats...
#1
Admitted 'rexaholic'
Thread Starter
If you've hollowed out your cats...
How did it change the sound? My SE is nearly as quiet as the wife's camry right now, just wondering how much louder it'll be with the cat hollowed out, if any louder at all. Just got a stock header & RB high flow cat.
#2
Senior Member
Join Date: Jul 2002
Location: Burlington, Ontario
Posts: 517
Likes: 0
Received 0 Likes
on
0 Posts
Mine is not that much louder, it just gives more of a rumble at idle. My racing beat exhasut on my last rex was louder. But my muffler is also brand new, that probably has alot to due with it. I do get the odd backfire.
#4
The infamous number guy!
Join Date: Dec 2002
Location: Terre Haute, IN.
Posts: 1,953
Likes: 0
Received 0 Likes
on
0 Posts
My car came with the stock exhaust and hollowed cats and i didn't even know it, it was very quiet, i was actually going to hollow out my cats, looked through the pipe and they already were... without cats the ACV needs to be removed and blocked off.
Trending Topics
#8
The infamous number guy!
Join Date: Dec 2002
Location: Terre Haute, IN.
Posts: 1,953
Likes: 0
Received 0 Likes
on
0 Posts
It works off the cats... or something, i don't really know... i just read it needs to be done. without cats the 5th and 6th ports need removed or wired open because the actuators won't have enough backpressure to open.
#11
Admitted 'rexaholic'
Thread Starter
Blockoff plate, actuators wired open, etc has been done.
https://www.rx7club.com/forum/showth...hreadid=169237
Now Kevin's having at it again, rebuilding my engine and doing a streetport, as well as hollowing out the cats. This car will really be something special in about a week!!
https://www.rx7club.com/forum/showth...hreadid=169237
Now Kevin's having at it again, rebuilding my engine and doing a streetport, as well as hollowing out the cats. This car will really be something special in about a week!!
#12
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,832
Received 2,599 Likes
on
1,846 Posts
Originally posted by O 16581 72452 5
It works off the cats... or something, i don't really know... i just read it needs to be done. without cats the 5th and 6th ports need removed or wired open because the actuators won't have enough backpressure to open.
It works off the cats... or something, i don't really know... i just read it needs to be done. without cats the 5th and 6th ports need removed or wired open because the actuators won't have enough backpressure to open.
mike
#13
FD > FB > FC
while were om the subject of cats, I have mine out right now, and is there anyway I can tell just by looking at it if its clogged? I dont really know what to look for here. All I can say is that there is that screen on both sides, and some of the holes in the screen are plugged up. I dont know how bad is "bad".
#17
Senior Member
Join Date: Jan 2003
Location: Pensacola FLA
Posts: 624
Likes: 0
Received 0 Likes
on
0 Posts
ive got the acv off and blocked and all emmisions off and a test pipe then midpipe with no muffler it sounds nice loud but nice got a cool murmur to it! well thats when the car is running lol!
#18
Senior Member
Join Date: May 2002
Location: British Columbia
Posts: 262
Likes: 0
Received 0 Likes
on
0 Posts
Hmm, does anyone know if its possible to run a test pipe with the air pump still hooked up, and the air pump 5/6th port mod done?
I'm thinking it might get kind of noisy with the vented pump going all the time...
I'm thinking it might get kind of noisy with the vented pump going all the time...
Thread
Thread Starter
Forum
Replies
Last Post
Kyo
2nd Generation Specific (1986-1992)
3
08-14-15 02:00 PM
HeatTreated
3rd Generation Specific (1993-2002)
6
11-10-02 04:13 AM