MX5 muffler delete

Create your own stuff? Talk about it here.
User avatar
Dwduc
Senior Member
Posts: 270
Joined: Wed Sep 18, 2013 9:14
Location: Sedalia

MX5 muffler delete

Postby Dwduc » Wed Nov 05, 2014 9:14

Little project for Saul.
Started with some plate and cut out a thin flange:
Image
Image

Cut a hole in it big enough for the exhaust tip Saul provided (he bought one way too big cuz he wanted that aggressive look).
Image

Put the pipe thru the hole with a slight down angle to prevent bumper melting and welded the backside. Ground the weld smooth so it should seat up well. This step was a little difficult, the pipe tip was very very thin and almost all chrome, the weld puddle was a little hard to control.
Image

Weight of his old stock muffler 16.6 lbs according to my bathroom scale:
Image

Weight of the delete tip <1 lbs:
Image

User avatar
Shadowden
Posts: 2277
Joined: Fri Aug 05, 2011 9:14
Location: Highlands Ranch
Contact:

Postby Shadowden » Wed Nov 05, 2014 9:14

Nice work! You did a great job getting that flange opening smoothed out and clean. What wire are you running in your mig? I'm running 0.023 so it is supposed to work a little better on thin material. The chrome finish is definitely a hurdle to overcome.

Great functional piece completed.

User avatar
Saul_Good
Senior Member
Posts: 476
Joined: Sun Jul 22, 2012 9:14
Location: Cerritos, CA (DW says i can't play here anymore...)
Contact:

Postby Saul_Good » Wed Nov 05, 2014 9:14

Can't wait to try this out! 15lbs weight savings, whut!?
Image

User avatar
Shadowden
Posts: 2277
Joined: Fri Aug 05, 2011 9:14
Location: Highlands Ranch
Contact:

Postby Shadowden » Wed Nov 05, 2014 9:14

Saul_Good wrote:Can't wait to try this out! 15lbs weight savings, whut!?


And less exhaust restriction!

FDEEZ
Senior Member
Posts: 232
Joined: Sun Aug 11, 2013 9:14
Location: Colorado Springs

Postby FDEEZ » Thu Nov 06, 2014 9:14

Nice! You should do a quick vid of the stock muffler sound vs muffler delete.

User avatar
Saul_Good
Senior Member
Posts: 476
Joined: Sun Jul 22, 2012 9:14
Location: Cerritos, CA (DW says i can't play here anymore...)
Contact:

Postby Saul_Good » Thu Nov 06, 2014 9:14

FDEEZ wrote:Nice! You should do a quick vid of the stock muffler sound vs muffler delete.


Will do.

This is mainly for track/autox. After the event, the regular (I say this cuz it's not stock either) one will be put back on.
Image

User avatar
Dwduc
Senior Member
Posts: 270
Joined: Wed Sep 18, 2013 9:14
Location: Sedalia

Postby Dwduc » Thu Nov 06, 2014 9:14

Think I'm using .030" wire. not positive though. This thing might be obnoxious loud, gonna drown out the sound of my popping and banging when I chase ya!

User avatar
Saul_Good
Senior Member
Posts: 476
Joined: Sun Jul 22, 2012 9:14
Location: Cerritos, CA (DW says i can't play here anymore...)
Contact:

Postby Saul_Good » Thu Nov 06, 2014 9:14

Dwduc wrote:This thing might be obnoxious loud, gonna drown out the sound of my popping and banging when I chase ya!


I might need to start looking for a straight thru midpipe in the spring/summer🙉
Image

User avatar
Saul_Good
Senior Member
Posts: 476
Joined: Sun Jul 22, 2012 9:14
Location: Cerritos, CA (DW says i can't play here anymore...)
Contact:

Postby Saul_Good » Sat Nov 22, 2014 9:14

Got this thing on today. It's friggin loud.
Image
http://vimeo.com/112577428
Attachments
DwDuc Muffler delete.jpg
Image

User avatar
RX-7 Chris
Posts: 7776
Joined: Tue Oct 02, 2007 9:14
Location: Colorado Springs
Contact:

Postby RX-7 Chris » Mon Nov 24, 2014 9:14

What about doing a supertrapp?
1984 RX-7 GSL-SE [size=84]My restomod project[/SIZE]


1964 Ford Galaxie 500XL flat black w/ white interior, 2 dr fastback, 390 thunderbird, C6 auto, 2500 rpm high stall converter, shift kit, AC, Holley 750 cfm

[size=100]RIP 1983 RX-7[/SIZE]

My Car Blog

User avatar
Saul_Good
Senior Member
Posts: 476
Joined: Sun Jul 22, 2012 9:14
Location: Cerritos, CA (DW says i can't play here anymore...)
Contact:

Postby Saul_Good » Mon Nov 24, 2014 9:14

Chris, It's ok if it's loud. I will only have this on when at the track -- gotta shave that weight! :P I've already got the muffler back on the car. It's a pretty quick swap.

I was unable to get recordings going 4500+ rpm but it actually sounds better (still loud) at the higher end of the tach.
Image

User avatar
Shadowden
Posts: 2277
Joined: Fri Aug 05, 2011 9:14
Location: Highlands Ranch
Contact:

Postby Shadowden » Mon Nov 24, 2014 9:14

Saul_Good wrote:Chris, It's ok if it's loud. I will only have this on when at the track -- gotta shave that weight! :P I've already got the muffler back on the car. It's a pretty quick swap.

I was unable to get recordings going 4500+ rpm but it actually sounds better (still loud) at the higher end of the tach.


That is how my T1R cat back is. It's pretty in vtec.

You had mentioned lugs before, but those look like through bolts. Can you exchange with the car on the ground? Probably doesn't matter since you will have it up changing wheels/tires anyway.


Return to “Fabrication”

Who is online

Users browsing this forum: No registered users and 1 guest