What Have You Done To Your Stagea Lately?

[Reprieve]

Dose anyone know why the muffler is like this with the small tube in the center with no perforations in it? i would think its more of a restriction?

[PN-Mad]

Its just the way that they make Jap systems, unfortunatly. A Load of GTR owners have been caught out this way- Pay big Dollars for a brand name Jap system that states 90mm diam. or whatever, only to have the system taper down within the mufflers and restrict power. Genrally this is only happening at power levels >250kw.

This is what I'm going to test on my car- I think the exhaust might be holding it back. Checking is easy enough- run your car up on the dyno. Then remove mufflers / cats and run it up again. If there is a big difference, then you know there is restriction. Its always a pay off between noise and flow- it takes a good exhaust fab. to make a good flowing not offensively loud exhaust.

[iamhe77]

I think you'll find that it is a silencer that should be removable.

[PN-Mad]

OP did say non-removable in the previous page. I couldn't figure out how to get it out from the pics- but I'd be looking!

This is an example of what I mean. The Lovely Fujitsubo exhaust that all of us M35 owners love. Have a look at the pipe diam. 76.3 (3inch) to 60.3mm (about 2.3inch) . Wat! I guess the nismo is about the same. Am I really trying to push 200kw through 2.3inch exhaust...?

Product Specs

Brand: FUJITSUBO

Product: Legalis R Exhaust Muffler Nissan Stagea NM35 Turbo

Part Num: 790-14933

Kit Includes:

- 1x Legalis R Exhaust Muffler

- 1x Gasket Packing

- 1x Gasket Ring

- 1x M10x20 Flange Nuts set

- 1x M10x35 Flange Nuts set

- 1x M10 Flange

SPECIFICATIONS:

Tip Tipe: Round Slash (W)

Tip Diameter: 94mm

Pipe Diameter: 76.3mm-60.5mm

Muffler Weight:

- OEM: 23.2kg

- Fujitsubo: 15.6kg

Intermediate acceleration (40km/h to 120km/h in 3rd gear)

- OEM: -

- Fujitsubo: 2.7sec

Maximum output

- OEM: -

- Fujitsubo: 197.0kw (267.9ps) / 5400rpm

Maximum torque

- OEM: -

- Fujitsubo: 431.2N/m (44.0kg/m)/2770rpm

Supercharging pressure:

- OEM: -

- Fujitsubo: 1.09kgf/cm2

Noise Levels (dB):

OEM:

- Idling Sound: 60

- Noise Near exhaust (5850rpm): 81

- 3000rpm: 72

- 5000rpm: 81

- Response 4000rpm~6000rpm: 96

Fujitsubo:

- Idling Sound: 66

- Noise Near exhaust (5850rpm): 86

- 3000rpm: 80

- 5000rpm: 85

- Response 4000rpm~6000rpm: 105

COMPATIBILITY NOTES:

- Only for Turbo vehicles

[iamhe77]

the 60.5mm is the pipe to the resonator.

the main pipe is 76.3mm all the way through to the muffler

[PN-Mad]

Did you look in the back end through to the twin tips?

I don't think thats 3 inch, not that I can get in there and measure it.

[iamhe77]

Pretty sure it would be 3". Remember that each tip is 94mm, so considerably larger than the exit point of the muffler

http://www.kakimotoracing.co.jp/image_n31359.html

http://www.nengun.com/kakimoto-racing/inner-silencer

Note the external daimeter.... just sayin'

[PN-Mad]

^^^ That looks like His silencer. Be interesting if he thinks its loud with the slilencer in

Looks like moar measuring / testing of my exhaust to be undertaken

[iamhe77]

Did you look in the back end through to the twin tips?

I don't think thats 3 inch, not that I can get in there and measure it.

Bah! I forgot you had the Nismo one like I did. I was referring to the Legalis tips.

I thought that the Nismo muffler's exit hole was closer to 2.5" at first glance, but didn't measure it either.

Pretty sure that the Legalis' was larger (3") and I can't imagine they would have a smaller point to the tips than the inlet of the muffler...

[ironpaw]

Am I really trying to push 200kw through 2.3inch exhaust...?

I don't understand. Me and Scott are running way higher then 200awkw on our Legalis...not sure how that would "restrict" you at 200kw??

[Reprieve]

i think this is what you guys are talking about? -

mine is deff non removable it is one with the muffler lol

[iamhe77]

My God that sounds shit

In your pic, is there a space around it? I can't really tell on this laptop with that pic

http://www.skylinesaustralia.com/forums/gallery/image/83088-kakimoto-full-mega-n1-rev-muffler-115mm-tip/

[PN-Mad]

I'm not saying that it would restrict to 200 exactly. I am well aware that Cars running the legalis are well up and over that.

What I am saying is that any restriction will cause a loss in power, and their might be gains in looking into the exhaust for restrictions- durh, I know.

And I don't have the same exhaust as you. I have a Nismo- now I don't know if there are any signifigant differneces between the two rear mufflers in either system. It could be that the nismo runs a 2.5inch reducer in the rear can, while the legalis is bigger. Who knows?

Thats why I'm going to test it out.

[Reprieve]

its probably 130mm deep tip then the 2inch looking pipe starts with no gap round it

[Reprieve]

I think im going to unbolt my muffler and have a listen - not like it could get any louder lol

[Daleo]

I'm not saying that it would restrict to 200 exactly. I am well aware that Cars running the legalis are well up and over that.

What I am saying is that any restriction will cause a loss in power, and their might be gains in looking into the exhaust for restrictions- durh, I know.

And I don't have the same exhaust as you. I have a Nismo- now I don't know if there are any signifigant differneces between the two rear mufflers in either system. It could be that the nismo runs a 2.5inch reducer in the rear can, while the legalis is bigger. Who knows?

Thats why I'm going to test it out.

The easiest way to check it to put a pressure gauge in line and check for backpressure; your cat might even have a blanking plug in it that you could use.

[slippylotion]

But if he had a bung silencer in the rear wouldn't he be able to see the bolt holding it in place!

[Daleo]

But if he had a bung silencer in the rear wouldn't he be able to see the bolt holding it in place!

Some of them just slide in the end and wedge in.

[scotty nm35]

I have seen this style of silencer before, you should be able to slide a die grinder in there with a cut off wheel and just trim it out. It is manufactured into the muffler to help quieten it down.

[Reprieve]

You reckon i could cut it out - i don't think it would be easy. wouldn't there be insulation in the muffler round that smaller center pipe? if i recall it looks the same from both ends if i look down the muffler tip or on the incoming side

some more piks for a better look -