Exhausts with good flow velocity

[jflogerzi]

Originally Posted by Dirty Harry

It can be, if you’re patient and wait for deals or regularly check eBay etc., you can get it cheap. Maybe get it second hand?

I got the STI lowering springs for $700 AU fitted and the STI axle back for $1150 AU fitted. The lowering springs were part of an email campaign from Subaru (I admit this one was a fluke). I kept searching for the STI axle back on eBay and one day saw one advertised for $1300 and realised the seller was a local Subaru dealer. I phoned the dealer directly and got it fitted for $1150, it was clearance stock.

The springs were normally $1100 fitted and the axle back around $2500 fitted, so pretty happy and a bit lucky I guess and yes those prices are too much.

Thats just nuts! 2500$ for an axleback is

[Goingnowherefast]

Originally Posted by jflogerzi

2.5 is fine for NA and even small turbo setup as long as everything flows well. Bigger HP boosted builds can benefit from a 3inch exhaust. You can make the same power with less boost.

Real world counterpoint, a K20/K24 will see huge gains from an 3" exhaust versus a 2.5" exhaust. Obviously not a perfect example as the K20/K24 head flows a lot more.

[Ultramaroon]

Originally Posted by Goingnowherefast

Real world counterpoint, a K20/K24 will see huge gains from an 3" exhaust versus a 2.5" exhaust. Obviously not a perfect example as the K20/K24 head flows a lot more.

^^^ This ^^^


Bottom line, It's all acoustics. Have to tune the whole instrument to make it sing. Once it's there, it's there. Season to taste. FA20 heads are the bottleneck. Tuning intake runners and exhaust headers will move the resonant points around but there's no genie waiting in the bottle.

[Dirty Harry]

Originally Posted by jflogerzi

Thats just nuts! 2500$ for an axleback is

Yeah I was never going to pay that price, but I must admit it is very well made. Very happy with what I got it for.

[jflogerzi]

Originally Posted by Dirty Harry

Yeah I was never going to pay that price, but I must admit it is very well made. Very happy with what I got it for.

I paid 800$ for the fujitsubo axle back but man the quality on the welds...

It's the poor man's STI muffler




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[nikitopo]

Originally Posted by jflogerzi

Thats just nuts! 2500$ for an axleback is

I have changed different things on my car. The STI performance muffler was one of the best changes and worth all the money. Car makes now the sound it deserves, tune had to be greatly revised (although I have to admit that the rest of the parts contributed as well and the axleback was the cherry on the cake), rear looks is now gorgeous.

Originally Posted by jflogerzi

I paid 800$ for the fujitsubo axle back but man the quality on the welds...

It's the poor man's STI muffler

Nothing wrong going to something cheaper too. STI sports/performance mufflers are also manufactured by Fujitsubo. They have a strong relationship with STI and they are supplying the exhaust of the Nurburgring 24h car. These guys know what they are doing.

[Dirty Harry]

Originally Posted by jflogerzi

I paid 800$ for the fujitsubo axle back but man the quality on the welds...

It's the poor man's STI muffler

I must admit it does look pretty good, if I didn’t get the good deal on the STI exhaust, I probably would’ve got one myself.

[Dirty Harry]

Originally Posted by nikitopo

I have changed different things on my car. The STI performance muffler was one of the best changes and worth all the money. Car makes now the sound it deserves, tune had to be greatly revised (although I have to admit that the rest of the parts contributed as well and the axleback was the cherry on the cake), rear looks is now gorgeous.

Imagine the titanium STI axle back, that would be a cherry and whipped cream on top

[Captain Snooze]

Originally Posted by nikitopo

How low the pressure behind each pulse is depends on the gas velocity.

Given we're talking semi science here I am going pedant mode. I apologise but I can't help it.

[nikitopo]

Originally Posted by Captain Snooze

Given we're talking semi science here I am going pedant mode. I apologise but I can't help it.

Too much gaming?

[RToyo86]

Originally Posted by jflogerzi

I paid 800$ for the fujitsubo axle back but man the quality on the welds...

It's the poor man's STI muffler
[

Love me some weld porn.

How long did it take to get your in?
I'll be ordering mine as soon as Black Friday sales take effect.

[jflogerzi]

Originally Posted by RToyo86

Love me some weld porn.

How long did it take to get your in?
I'll be ordering mine as soon as Black Friday sales take effect.

2 days from ftspeed. Pretty sure it was dropped shipped. Now 1 left

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[RToyo86]

Originally Posted by jflogerzi

2 days from ftspeed. Pretty sure it was dropped shipped. Now 1 left

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Good to know!

I may have a 2.5" midpipe fitted later by FT86MS( link ) to spread out damage to the wallet.
On the subject of exhaust flow, it might add a couple HP. I am more interested in tuning sound as needed.

[jflogerzi]

Originally Posted by RToyo86

Good to know!



I may have a 2.5" midpipe fitted later by FT86MS to spread out damage to the wallet.

On the subject of exhaust flow, it might help with power. I am more interested in what it would do to the sound.

I am just going to use a stock mid pipe. I am going to be catless with full exhaust from JDL before mid pipe so there should be zero flow issues

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