Screamer pipe Too loud!

[Robbie]

I think I've got to come up with a way to reduce the noise when the external wastegate opens up so I can enter a few more track events with strict sound levels.

Ive got the boostlogic kit that uses a 50mm pipe exiting the gases next to the lower sub frame mount. This doesn't give me enough room to connect up the pipe to the downpipe unless I cut it in at 90 degrees and I'm not too happy about welding onto the thin metal of the pipes anyway.

 

Does anyone know of a silencer/ muffler that would fit. I was told that Porsche did one but I've yet to find it. Some help would be appreciated:)

[Chris Wilson]

Get it plumbed back into the main system, that's the proper way. If you insist on a seperate muffler it needs to be sizeable and not just hanging on the end of the wasteaget, so support needs careful thought, to allow for expansion and contarction.

[Robbie]

Get it plumbed back into the main system, that's the proper way.

 

 

 

If I can find a way I will. There's so little room between the chassis, the downpipe, the engine and the position of the wastegate! Ideally I would have the gasses enter the main system after the main bend of the downpipe but i dont think I can fit an extended pipe past the subframe and the engine

[Chris Wilson]

You'll need a silencer about 2 foot long with baffles to shut up the noise from an open wastegate, so you still have the same prroblem, you may have to re engineer the manifold and mover the wastegate. I would NEVER buy a manifold and wastegate that isn't designed to plumb the exit of the `gate back into the exhaust, converting them afterwards is a nightmare. Making one that flows into the main system vent to atmo is trivial though. No way will it be elligible for most track days until this is done, so it's very limiting.

[mikeyb10supra]

You'll need a silencer about 2 foot long with baffles to shut up the noise from an open wastegate, so you still have the same prroblem, you may have to re engineer the manifold and mover the wastegate. I would NEVER buy a manifold and wastegate that isn't designed to plumb the exit of the `gate back into the exhaust, converting them afterwards is a nightmare. Making one that flows into the main system vent to atmo is trivial though. No way will it be elligible for most track days until this is done, so it's very limiting.

 

Sorry for the hijack robbie.....chris can this be done with one of arnouts manifolds and some custom pipework being fabricated??

 

This is something im thinking about as we speak

[Wez]

If you mean a cast manifold then yes it can be done as it can on any manifold as this part of the pipework is seperate from the manifold anyway.

 

Hayward and Scott could do this for you as i am also looking at options, mine is so so loud and my current screamer also has a silencer on it

[mikeyb10supra]

If you mean a cast manifold then yes it can be done as it can on any manifold as this part of the pipework is seperate from the manifold anyway.

 

Hayward and Scott could do this for you as i am also looking at options, mine is so so loud and my current screamer also has a silencer on it

 

 

Brill cheers wez, yep its a cast manifold, so Haywood and scott sound just the tickek and only 20min drive from me

 

how does the designing work, as ive never been to a pipe benders before, presumably they will need my car with manifold and turbo fitted before they can design it?? I will also need the downpipe fabricated as well

[Wez]

They will design it for you, just tell them exactly what you want.

 

Not sure how they would do it off the car though.

 

My current dumb to atmos setup was done by H&S and its fitted with brackets etc, very well put together, when I change to dump back into the exhaust I will take it back to them to redo it.

[Chris Wilson]

They'll need the car with manifold and turbo fitted, and the wastegate you intend to use.