What does an open dumptube sound like?

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Old Nov 9, 2004 | 03:44 PM
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opto_isolator's Avatar
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Default What does an open dumptube sound like?

What does the an open dump tube sound like with a 35mm wastegate installed?

I've searched before, but only found 1 thread - which really wasn't much help.

Does the wastegate make a "rat-tat-tat" sound when the specified boost pressure is reached? Or is it supposed to be quiet?
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Old Nov 9, 2004 | 03:46 PM
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Default Re: What does an open dumptube sound like? (opto_isolator)

It sounds like a bad exhaust leak.
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Old Nov 9, 2004 | 03:56 PM
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Default Re: What does an open dumptube sound like? (ben@importparts.com)

I'm sorry - maybe I should rephrase my question.

What is the wastegate supposed to sound like when it actuates?

I know what the sound of the actual open dump tube is - but I am just curious to know if the wastegate is supposed to make a lot of racket when it actuates....
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Old Nov 9, 2004 | 04:05 PM
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i have an open dump on my car, its a d16, drag mani, t3, and a deltagate. whenever the gate opens up, it just gets REALLY loud, like BAM! INSTANT NOISE!

its kinda cool, i like it, but some people hate it. IMO it sounds very mean when it opens up. it definitely sounds mildly frightening.
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Old Nov 9, 2004 | 04:14 PM
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Finland's Avatar
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like a moped on steroids...

IMO...it sounds like total dogfuck. I have mine recirculated into the main downpipe.
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Old Nov 9, 2004 | 04:25 PM
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DOGFUCK!!!!! funniest word i've seen all week. top notch man! made my night..
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Old Nov 9, 2004 | 04:42 PM
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Default Re: (redzcstandardhatch)

So what kind of benefits are there to having an open dumptube?
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Old Nov 9, 2004 | 04:50 PM
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Default Re: (brickonwheels)

A few extra ponies.
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Old Nov 9, 2004 | 04:51 PM
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i just did it cause i was sick of routing piping , so i slapped together a "dump" tube. took 5 minutes of cutting and welding
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Old Nov 9, 2004 | 04:52 PM
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Default Re: What does an open dumptube sound like? (opto_isolator)

it is hard to describe. It is just really loud and obnoxious. My new dump tube is like 1.75 inches and really close to the ground. When it dumps it is so loud I can not hear anything. I can not even hear v-tec pop anymore.
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Old Nov 9, 2004 | 05:07 PM
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Default Re: What does an open dumptube sound like? (underpressure02)

Loud is a relative term....

Mine is loud. BUT - I can hear my wastegate valve banging against the the valve guide (rat a tat tat)....I've read on here that 1 other user posted something like this before - but that thread died.

The wastegate seems to work great (holds pressure, doesn't creep, etc) - its just loud, and I wondered if this is normal or what....
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Old Nov 9, 2004 | 05:09 PM
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Default Re: What does an open dumptube sound like? (underpressure02)

It sounds cool in first and second, but in thrid and forth when the motor is at full load it sounds like CRAP, I hated it. So I recirculated it back into the DP and its MUCH better.

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Old Dec 10, 2004 | 02:37 PM
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Default Re: What does an open dumptube sound like? (opto_isolator)

Heres a video of an eclipse with open dump..
GT32/?? turbo with tial wastegate(dumped to the ground)..Also HKS cams,,
Car coming at you..Idling,,accelerating away from you and in-car..(No music)

Right click save-as

about 5mb..Its a real good video..Download it before the link dies,,
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Old Dec 10, 2004 | 02:42 PM
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Default Re: What does an open dumptube sound like? (opto_isolator)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by opto_isolator &raquo;</TD></TR><TR><TD CLASS="quote">Loud is a relative term....

Mine is loud. BUT - I can hear my wastegate valve banging against the the valve guide (rat a tat tat)....I've read on here that 1 other user posted something like this before - but that thread died.

The wastegate seems to work great (holds pressure, doesn't creep, etc) - its just loud, and I wondered if this is normal or what....</TD></TR></TABLE>

You shouldn't hear the valve tapping around when the wastegate opens. All you should hear is the sound of exhaust, nothing else
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Old Dec 10, 2004 | 02:42 PM
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Default Re: (brickonwheels)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brickonwheels &raquo;</TD></TR><TR><TD CLASS="quote">So what kind of benefits are there to having an open dumptube?</TD></TR></TABLE>

Same effect as running a larger downpipe. At least thats my theory on it. Under boost the exhaust will choose to flow the less restrictive route (AKA the dump tube).
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Old Dec 10, 2004 | 02:45 PM
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Default Re: What does an open dumptube sound like? (opto_isolator)

The open dumps I've heard all sounded different.

Most noteable are the 4G64 with a 16G sounds like barfing noises when the wastegate opens and a friend's SR20DET with a T3/T04e that sounds like a motorcycle with an exhaust.

The ACV-R's wastegate solenoid was a lot louder than the GReddy Profec Spec B's in my experience. It clicks so fast and loud it sounds like Edward Scissor Hands on a type writer.
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Old Dec 10, 2004 | 03:48 PM
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Default Re: What does an open dumptube sound like? (IN VTEC)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote"> It clicks so fast and loud it sounds like Edward Scissor Hands on a type writer.</TD></TR></TABLE>

Nice analogy... LOL
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Old Dec 10, 2004 | 05:10 PM
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Default Re: What does an open dumptube sound like? (631 Teggy)

ask, and you shall recieve

ls@8lbs.......open tial 38mm; no dump tube, strait off the WG (temp of coarse )

http://www.we-todd-did-racing....DE%3D
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