screamer pipe
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From: South Shields
its an unsilenced length of pipe which goes from the turbo wastegate to atmosphere, so when the wastegate opens the gasses passing through it are seperate to the normal exhaust gasses, so dont mess up and interfere with the flow characteristics of the exhaust gasses.
10K+ Poster!!
Joined: Jun 2003
Posts: 10,788
Likes: 2
From: South Shields
10K+ Poster!!
Joined: Jun 2003
Posts: 10,788
Likes: 2
From: South Shields
also check this link for some more pics and description
http://fordlaser.com/forum/viewtopic...552daa3046ee14
http://fordlaser.com/forum/viewtopic...552daa3046ee14
Originally Posted by Red16
what turbo are you running? as some turbos you cant have one with
you wont know its there until you make full boost
you wont know its there until you make full boost
You will hear it as soon as the Wastegate opens. So, potentially, that could be around 14psi, perhaps even earlier depending on which Actuator (for internally 'Gated turbo's) or Wastegate Spring (for externally 'Gated turbo's)
Also, they are LOUD. A nice novelty, for about 5 minutes, but then it will get on your nerves. Believe me, we map as many cars with Screamer pipes as we do without and I wouldn't have one again. If I did, it would have a silencer in it or go back into the exhaust.
As briefly as it can be described......
A normal Internally Wastegated Turbo has 2 outlets. One is that main Turbine outlet, the other is the Wastegate. The Wastegate has a 'Flap' which is controlled by the Actuator. So, the Actuator holds the Wastegate flap closed until the pressure in the Boost system reaches a certain level controlled by the 'Pre-load' and Spring rate on the Actuator, where is allows the Wastegate to be blown open, thereby bleeding off excess boost pressure. This allows the boost level to be controlled.
Normally these 2 outlets vent into one exhaust, which goes through the normal silencer system and all comes out the back of the car.
On an internally 'gated turbo, you can separate the Turbine outlet from the Wastegate using a special divider and direct the Wastegate gasses down a separate pipe. This basically takes the strain off the exhaust, sending a proportion of the gasses elsewhere allowing the exhaust to be more efficient.
Normally people chose to have an unsilenced Screamer pipe that vents either under or out the side of the car. You can, however, add a Silencer or direct the Screamer pipe back into the exhaust further down the pipe. The main point is that the first few inches of exhaust are most critical as it normally contains a bend or two, so after this, you can normally get away with putting the pipe back into the exhaust.
With an Externally 'Gated turbo, you have to run a Screamer Pipe, although you do have the option still of taking the above measures to make it more bearable.
Hope this helps!!
A normal Internally Wastegated Turbo has 2 outlets. One is that main Turbine outlet, the other is the Wastegate. The Wastegate has a 'Flap' which is controlled by the Actuator. So, the Actuator holds the Wastegate flap closed until the pressure in the Boost system reaches a certain level controlled by the 'Pre-load' and Spring rate on the Actuator, where is allows the Wastegate to be blown open, thereby bleeding off excess boost pressure. This allows the boost level to be controlled.
Normally these 2 outlets vent into one exhaust, which goes through the normal silencer system and all comes out the back of the car.
On an internally 'gated turbo, you can separate the Turbine outlet from the Wastegate using a special divider and direct the Wastegate gasses down a separate pipe. This basically takes the strain off the exhaust, sending a proportion of the gasses elsewhere allowing the exhaust to be more efficient.
Normally people chose to have an unsilenced Screamer pipe that vents either under or out the side of the car. You can, however, add a Silencer or direct the Screamer pipe back into the exhaust further down the pipe. The main point is that the first few inches of exhaust are most critical as it normally contains a bend or two, so after this, you can normally get away with putting the pipe back into the exhaust.
With an Externally 'Gated turbo, you have to run a Screamer Pipe, although you do have the option still of taking the above measures to make it more bearable.
Hope this helps!!
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