Getting a better sound from a NB..

Hjt · Postby **Hjt** » Mon Dec 05, 2011 3:51 pm

Want a great sound, bore your cylinders and run lumpy large cams

Postby **NitroDann** » Mon Dec 05, 2011 4:05 pm

I should make a clip of mine, I get a few compliments about it.

GFs mum said the scariest part is that you cannot hear yourself scream over the intake noise!

Dann

bruce · Postby **bruce** » Mon Dec 05, 2011 5:22 pm

NitroDann wrote:GFs mum said the scariest part is that you cannot hear yourself scream over the intake noise!

Dann, that is wrong on so many levels...

Postby **NitroDann** » Mon Dec 05, 2011 5:36 pm

Hahahahahahahaha.

Dann

Postby **Okibi** » Mon Dec 05, 2011 7:11 pm

Sounds good, any photos? :mrgreen:

Silvia · Postby **Silvia** » Mon Dec 05, 2011 7:28 pm

Looks exactly like the SMB one you mentioned earlier (http://www.smb.net.au/mx5zone.htm) but in steel with a 350mm /14" x 2.25" Lukey Sports muffler.

Postby **Okibi** » Mon Dec 05, 2011 8:15 pm

cat back?

Silvia · Postby **Silvia** » Mon Dec 05, 2011 8:35 pm

cat back?
No, she's still away.... :lol:

Just the axle-back set up, bolt-on fabrication. I'm looking for great sound, not extra performance.... I'm finding the high compression engine has a lot of herbs.
I'm hearing a timing advance can make a big difference in this engine (2002, 95 RON version)

Caffeine · Postby **Caffeine** » Wed Dec 07, 2011 8:45 am

NB8's have a knock sensor and will advance the timing automagically, some people have artificially fooled the ECU into advancing the timing further by rotating the crank angle sensor (involves some dodgy cutting and drilling) but it's not the ticket to free grunt on the NB like it was for the NA.

93_Clubman · Postby **93_Clubman** » Fri Dec 09, 2011 2:12 pm

Caffeine wrote:...some people have artificially fooled the ECU into advancing the timing further by rotating the crank angle sensor (involves some dodgy cutting and drilling)...

Caff, no need for the dodgy CAS mod any more, as there's COTS solution:
http://5xracing.com/i-6330020-5x-racing ... miata.html

Matty · Postby **Matty** » Mon Dec 12, 2011 10:33 am

Best near-stock MX I've heard had a used Falcon V8 muffler installed.

BTW the knock sensor will retard the ignition when knock occurs. It will not advance it past the base map settings at other times. This is where an ignition timing mod helps, as there is usually a margin between the base map settings, the point of optimum power, and the point that knock occurs.