Redline performance exhaust

[GorGasmSpecB]

Hehe my E55 headers were the same.  Fouled on the steering column as they were designed for LHD.  The guy fitting them bashed the down pipe in like yours.  Seemed to be all good .

[G B]

Happy to be corrected, but I always thought that any restriction after the turbo had the potential to affect velocity of gasses which can reduce spool up time.

[Guest]

3 hours ago, G B said:

Happy to be corrected, but I always thought that any restriction after the turbo had the potential to affect velocity of gasses which can reduce spool up time.

 

Boost is a measure of restriction. So in theory if you have a tiny exhaust yes you will make massive boost pressure with no flow which equates to a reduction in power. You want post turbo to flow at zero preferrably.

[El_Chado]

Even at the most narrow point where I've had to bash, it's still far wider than my stock pipe.

[G B]

Yes, the exhust gasses will quickly expand after the tubo but will then hit the 'constriction' which will affect velocity before they expand again. I would expect that to have an effect on flow and therefore performance.

Granted  it may be minimal, but would sfill be there?

[El_Chado]

I'm not chasing big Kw's so im not bothered.

[boon]

1 hour ago, G B said:

Yes, the exhust gasses will quickly expand after the tubo but will then hit the 'constriction' which will affect velocity before they expand again. I would expect that to have an effect on flow and therefore performance.

Granted  it may be minimal, but would sfill be there?

 

The wastegate flap on a VF is so small, being so close to the constriction it's really going to make virtually nil difference.

 

That said, unless I was forced to DIY it I would have got someone with a welder to notch that with a little bit of small-diameter stainless tube.

 

 

[Stielz]

El_Chado, what do you reckon about the sound note/volume of this kit?

 

Cheers for the heads up about the fitment issue with the steering rack linkage!

Maybe that could be fixed using a STI steering rack linkage - or any one that does not have the rubber vibration dampening coupler..?

[Kiwi_Fozze]

They are fuxxing loud with the silencer out, and sound like you're dragging plastic with it in

[El_Chado]

On 2017-5-15 at 1:52 PM, Stielz said:

El_Chado, what do you reckon about the sound note/volume of this kit?

 

Cheers for the heads up about the fitment issue with the steering rack linkage!

Maybe that could be fixed using a STI steering rack linkage - or any one that does not have the rubber vibration dampening coupler..?

 Sounds like dawg shite without the silencer and sounds stock with the silencer in. I'm going to replace the muffler with a Genome muffler when i can track one down.

 

If you have a forester then the steering linkage needs to be from a forester sti. Other sti linkages are slightly shorter. Im guessing since the fozzy has a factory body lift but I could be mistaken. 

[IZichard]

30 minutes ago, El_Chado said:

 Sounds like dawg shite without the silencer and sounds stock with the silencer in. I'm going to replace the muffler with a Genome muffler when i can track one down.

 

If you have a forester then the steering linkage needs to be from a forester sti. Other sti linkages are slightly shorter. Im guessing since the fozzy has a factory body lift but I could be mistaken. 

 

There is a genome muffler off of a legacy on trademe at the moment, might work with some modifications?

 

https://www.trademe.co.nz/1325824575

 

Im not sure what the longer tip would look like on a Forester.

[El_Chado]

That could work. Also the problem with the redline muffler is i had to remove my towbar

[Stielz]

What do you guys reckon about flipping the steering linkage around? 

 

That would place the fat rubber coupler lower down, maybe far enough down to not interfere with the downpipe.. 

 

Just a though I had, no sure if would even work.. Thoughts?

[Kiwi_Fozze]

38 minutes ago, Stielz said:

What do you guys reckon about flipping the steering linkage around? 

 

That would place the fat rubber coupler lower down, maybe far enough down to not interfere with the downpipe.. 

 

Just a though I had, no sure if would even work.. Thoughts?

Nah the splines on each side of the linkage are different

[Stielz]

Makes sense, that would have just been too easy

[killervq30de]

Watched this interesting video the other day .. where they bash and squash the hell out of headers and dyno the results as they go .. maybe different with turbo but at one point it Made power

 

OKAAAY - So looks ADIKT posted this already .. probably why I saw it in the first place.. so mines a repost .. I'll let it stand  ..

 

 

 

Edited June 12, 2017 by killervq30de