OMX-596 - 1996 Spec'd NA6 - Updated 21 Apr 2013

Postby **orx626** » Sat Jun 14, 2008 7:05 pm

Here's some piccies and a vid from the Club Trackday held at Queensland Raceway on the 10th June. Thanks to Mr Starlet & 116GTA for the snaps.

Vid link -

Cheers,
Danny

Postby **orx626** » Sun Jul 27, 2008 9:36 pm

Got around to fabricating a new exhaust system yesterday!

The system is a 2.25" diameter stainless steel system that utilises a NPower rear muffler and XForce extractors. A 2.25" high flow catalytic convertor from NPower was also used. I'm extremely happy with not only the improvement in sound but also the incredible increase in top end performance when compared to the original factory exhaust. I'd never get near the rev limiter previously, but now......it's all too easy :twisted:

.

There is no droning or booming either.....the combination works very well together.

Here's some piccies of the build....

Changed out the 2 bolt flange for a 3 bolt.

NPower rear muffler in position with 2 bolt flange removed.

Positioning and tacking of the cat convertor....

Xforce Extractors....

Finished system from front....

Finished system from rear....

Rear end piccies....

Renesis NC waiting for some TLC....

Cheers,
Danny

timk · Postby **timk** » Sun Jul 27, 2008 11:13 pm

That work looks hawt! We'll have to "arrange" something when I decide to upgrade my SE exhaust!

Postby **orx626** » Tue Jul 29, 2008 8:25 pm

saboteur wrote:That work looks hawt! We'll have to "arrange" something when I decide to upgrade my SE exhaust!

I'm sure we can come to some sort of "arrangement" Tim

.

TheMissus wrote:Every time you post an update of what you've done I am just in awe.

Thanks Michelle. I'm stoked with the result, the improvement in performance was better than expected....anymore progress on your NA6

Cheers,
Danny

Postby **orx626** » Sun Aug 10, 2008 5:02 pm

TheMissus wrote:Ask me about my favourite subject why doncha Danny? Just stop reading if you get bored

Haha! I will never get bored of cars Michelle.

Made up an extension loom to allow the factory oxygen sensor to be reinstalled. This was required because the tapped boss for the oxygen sensor on the new extractors is further down the track.

Have got a bit of heat through the extractors now.....I have also added a mid-length exhaust hanger as well.

Looking forward to Lakeside in 2 weeks! :twisted:

Cheers,
Danny

Postby **orx626** » Wed Aug 13, 2008 4:51 pm

Mundi wrote:Beautiful car mate, love the work that went into it.

Thanks Mundi.

Hope your 5 turns out just the way you want it!

Cheers,
Danny

sliq · Postby **sliq** » Wed Aug 13, 2008 6:21 pm

Danny, i'm no exhaust specialist, but wouldn't a straight through exhaust produce more power than the npower exhausts?

Postby **orx626** » Wed Aug 13, 2008 6:35 pm

sliq wrote:Danny, i'm no exhaust specialist, but wouldn't a straight through exhaust produce more power than the npower exhausts?

Absolutely Sliq

.

However, the exhaust noise would have been obscene on a road car, and my wife would have been most upset :frown:

. A turbo would quieten it down a bit though (I'm not going down that path though)....I run a straight through system with hand-built mufflers on my 626 which uses a turboed 13B. It is quite acceptable.

I've found the NPower unit to be a great rear muffler by providing a noticable increase in engine performance without the unbearable noise. It really does sound great when on song above 4000 rpm.

Cheers,
Danny

Oh yeah, it looks tops too!

PUR157 · Postby **PUR157** » Thu Aug 14, 2008 2:09 am

Do you run around with the extractors unshielded?

My car is in a similar sort of state right now and I'm scratching my head as to whether or not I should worry about heat disspiation...

sliq · Postby **sliq** » Thu Aug 14, 2008 11:11 am

don't NA's come with a heatshield, standard?

Postby **orx626** » Thu Aug 14, 2008 11:32 am

PUR157 wrote:Do you run around with the extractors unshielded?

My car is in a similar sort of state right now and I'm scratching my head as to whether or not I should worry about heat disspiation...

Yes, I'm currently running them without a heatshield. The reason for a heat shield is to protect surrounding items from excessive heat. I will be fitting a heat shield in the not to distant future.

If you are concerned about heat dissipation from the exhaust gases then a heat shield is not the best solution. I recommend having the extractors ceramic coated (especially if they are mild steel) inside and out (ie. HPC) and installing a heat shield. This will reduce heat exposure of surrounding items and will also keep the exhaust gas energy higher.

Cheers,
Danny

Postby **orx626** » Thu Aug 14, 2008 11:34 am

sliq wrote:don't NA's come with a heatshield, standard?

Yes they do Sliq. However the standard headers have captive nuts to attach the heat shield to. The standard heat shield will not fit the aftermarket extractors.

Cheers,
Danny