Screamer pipes

[stylus350]

Out of interest, what is/was the joint and angle like when you had it plumbed into the exhaust?
Was the 20bhp drop/gain at a certain rev range, or general trend?

Was plumbed in to point in the direction of flow to try to keep disruption to a minimum

[Brett]

Presume the join was flush into the main exhaust? No protrusions?

Also, was power down in general, or only at certain rev/boost/throttle?

[stylus350]

Presume the join was flush into the main exhaust? No protrusions?

Also, was power down in general, or only at certain rev/boost/throttle?

You presume correctly. It was as good as it could be after much thought was put into it before any work began.

Jets got the charts I can\'t remember specifics but I run a screamer now which, at some point Will have its own silencer.

[Brett]

It\'s a black art!

[Grizzly]

Do you think it would make a difference plumbing the Return pipe in as far back as possible? (maybe mid pipe area?) or maybe put a dent just before the Return into the Downpipe to cause a low pressure spot as close to the end of the return as poss to help reduce Transition Turbulence at speed?

Be great to have a dyno that you could play on

[stylus350]

Do you think it would make a difference plumbing the Return pipe in as far back as possible? (maybe mid pipe area?) or maybe put a dent just before the Return into the Downpipe to cause a low pressure spot as close to the end of the return as poss to help reduce Transition Turbulence at speed?

Be great to have a dyno that you could play on

ye would be trying all kinds of shiz if i had my own dyno!!!

[jetpilot]

Do you think it would make a difference plumbing the Return pipe in as far back as possible? (maybe mid pipe area?) or maybe put a dent just before the Return into the Downpipe to cause a low pressure spot as close to the end of the return as poss to help reduce Transition Turbulence at speed?

Be great to have a dyno that you could play on

Interesting thought and concept, however, not being au fai with the darker art of exhausts and tuning, would the exhaust flow not be constant throughout the entire length of it, or are you suggesting that it then has less time to exit to actually interfere with the flow?

So, would it not be best, just before the back box with the introduction of a y pipe?

Seems to me the safest option, cost wise, would be to silence the screamer pipe as you are guaranteed a result!

[a.tapos]

The only reason i could see is if the exhaust acts as a venturi and and sucks the gas out of the w/gate when it opens causing it to oull out too much gas before the controller has time to adjust it,or boosted gas from the wastegate may affect the parth partially of the escaping exhaust gas and gas a dropin flow,
 
probably wrong but the first makes sense.,,
 
maybe this is less likely on a turbo with a top boost controller/wgate

[stylus350]

It\'s purely and simply to do with flow. If for eg. only half the engines gases are passing through a 3" system because of the rest diverted through the WG once plumbed back in that 3" system is now having to flow twice the volume. We all know the best exhaust for a turbo engine is no exhaust at al......

[BlitzBoy]

It\'s purely and simply to do with flow. If for eg. only half the engines gases are passing through a 3" system because of the rest diverted through the WG once plumbed back in that 3" system is now having to flow twice the volume. We all know the best exhaust for a turbo engine is no exhaust at al......

Correct :Thumbs-up

[jetpilot]

It\'s purely and simply to do with flow. If for eg. only half the engines gases are passing through a 3" system because of the rest diverted through the WG once plumbed back in that 3" system is now having to flow twice the volume. We all know the best exhaust for a turbo engine is no exhaust at al......

So i am with you know, hence why larger wastegates flow better...

I always wondered why wastegates were different sizes, sorry to sound daft

I think a silenced screamer is def the way forward then

[stylus350]

Correct :Thumbs-up

Yaaaaay! It\'s like getting a pat on the head from a wise uncle

[stylus350]

So i am with you know, hence why larger wastegates flow better...

I always wondered why wastegates were different sizes, sorry to sound daft

I think a silenced screamer is def the way forward then

That\'s what Im doing dude

eventually.