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Old 04-06-2004, 06:27 PM   #1
eightballrj
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Default External wastegate owners please speak up!!

I am having some boost creep issues that I am trying to fix by either porting the wastegate housing on my 20g or just going external with one. If I go external I am going for a Tial 38mm. I assume that if I go external that I am going to dump it to the atmosphere because plumbing it back in is a pain in the butt from what I have heard.

1. Does anyone have any sound clips of a Subaru with an external wastegate dumped to the atmosphere?

I have heard them on other cars but I just didnt know if on ours it was going to be less of a SHHHHHHHH and more of a BLLLAAAAAAP sound, LOL!!

2. If no sound clip can you describe the sound? I know its LOUD but a description of the LOUD would be nice, haha.

3. Is the 38mm gate big enough for a 2.5l with a 20g?

Thanks for your help!!

Richard Jackson
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Old 04-06-2004, 07:40 PM   #2
subywrxwrblu
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Loud as hell!

Mine dumps right under the passenger floor board more or less. People that ride in my car describe it as to metal pipes vibrating together, which I don't see how

To me it sounds like an air hose with a large opening, best way I can describe it, but damn is it loud

But think of this, its only going to open where you have your boost set at, so its not like it will be open all of the time, I mean unless you drive around at that boost level all of the time.
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Old 04-06-2004, 07:43 PM   #3
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I know how it works, haha. Thanks for the explanation though!! But, I just didnt know how Suby's sounded relative to say a porsche turbo or supra or mustang with an open dump. So, its like a very loud "whoosh" or hiss? I have heard some that sounded like a huge fart and I didnt want that, haha.

Thanks,
Richard Jackson
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Old 04-06-2004, 09:19 PM   #4
wRxbeater11
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Basically when you get in boost it kinda sounds like a lil weed wacker that went crazy go off.. To me I think it sound bad ass and scares people Ill be going that once my Green arives

-Melo
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Old 04-06-2004, 09:47 PM   #5
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Can't add to what it sounds like (since I don't use one) but you could always just reroute the external WG via plumbing back into the exhaust. This would solve your problem of boost creep and add performance all while being discreet.
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Old 04-06-2004, 10:07 PM   #6
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Quote:
Originally posted by tmarcel
Can't add to what it sounds like (since I don't use one) but you could always just reroute the external WG via plumbing back into the exhaust. This would solve your problem of boost creep and add performance all while being discreet.
Pfffff....Discreet!!!!, I think not dear laddy..
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Old 04-06-2004, 11:35 PM   #7
eightballrj
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See thats what I am saying... some people say it sounds like a weedwacker on steriods and some say its just a loud hiss or whoosh. I guess it depends on you setup and the wastegate and the motor.

But, does anyone know if the 38mm would be big enough or do I need to go for the 40mm??

Thanks,
Richard Jackson
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Old 04-06-2004, 11:36 PM   #8
subywrxwrblu
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sorry dude, I can't compare them to the other cars you mentioned.
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Old 04-07-2004, 12:33 AM   #9
wRxbeater11
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Ive herd them on Talon's and honda's they both sounded the same.. BAD ASS!


Plus maybe it depends on which wastegate? My vote goes to Tial
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Old 04-07-2004, 02:07 AM   #10
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Here is my car racing with the a 40 mm Tial wastegate dumping to the ground:

Right Click and save: http://www.nickslife.citymax.com/f/qualcomm.wmv
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Old 04-07-2004, 02:23 AM   #11
ErikAnderson
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So, educate me please as my tiny brain sometimes takes some time to spool up. With an external wastegate you eliminate or atleast controll boost creep because you dump it directly in to the atnosphere and dont have to worry about your exhaust system. Is it compatable with IHI systems? Can you run an AVCr with a external wastegate?
THanks in advance
Erik
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Old 04-07-2004, 02:26 AM   #12
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WRXbeaster11

I am waiting for your reply for my cluster i paid for. email me my tracking number. its been a week already, please reply to my emails.
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Old 04-07-2004, 02:32 AM   #13
STEALTH-WRX
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Quote:
Originally posted by ErikAnderson
So, educate me please as my tiny brain sometimes takes some time to spool up. With an external wastegate you eliminate or atleast controll boost creep because you dump it directly in to the atnosphere and dont have to worry about your exhaust system. Is it compatable with IHI systems? Can you run an AVCr with a external wastegate?
THanks in advance
Erik
Basically external wastegates are more precise and can control boost with less spikes due to their fast response and build.
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Old 04-07-2004, 02:36 AM   #14
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Quote:
Originally posted by STEALTH-WRX
Basically external wastegates are more precise and can control boost with less spikes due to their fast response and build.
so can i still run an avcr with one?
i am picturing a custom exhaust setup here in my mind. am i correct?
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Old 04-07-2004, 03:04 AM   #15
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Erik, I'm running an AVCR with mine. It's not really a custom exhaust setup.. it's more of a custom uppipe setup, hehe. I'm running a Tial 38mm, and I mounted it straight back towards the firewall, off the uppipe, between the uppipe and the downpipe. I have pics of it, and I'll try to get it up. You can run it with any turbo system.. it just eliminates the wastegate. It is supposed to help spoolup because you eliminate the wastegate gases merging with the exhaust gases coming out of the hot side of the turbo, hence, less backpressure.. but I haven't noticed anything different, spoolup-wise. It sure does hold boost like crazy though.

Richard.. the best way to explain it is, basically when you floor it.. you'll hear the turbo spoolin... then all of a sudden the wastegate opens up and it's super loud. Sorta like: ssssshhhhhhhhhh-BBAAAAAAAA!!!!!!!!!

I think it sounds badass, and the thing holds like a champ. By the way, the 38mm -should- be enough. That 531whp neon is running a 38mm @ 30psi and it sticks like white on rice. But if you want to go bigger, just skip the 40 and go with the 44mm. They're new, not that expensive, and come with V bands
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Old 04-07-2004, 04:32 AM   #16
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OK, so i am running a set of DN performance SS unequal length headers with an integral up pipe. could an uppipe such as this (one that is built in to the header) be modded to accomidate a external wastegate? i imagine that it also needs.. for lack of a etter term a dump shoot or exhaust port so you are not just venting hot exhaust gasses all over your engine bay correct?
Sorry for the dumb questions but this really has me going.
I honestly dont think my setup needs it, just a measley TXS stage 4. but it sure would be something different, and if it holds boost at a more refined level i think that would be worth it right there. and why lie, i like the sound.
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Old 04-07-2004, 07:22 AM   #17
eightballrj
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Thanks Turkey! shhhhh-BAAAAA is the way that I have always heard them too, kinda...LOL. Anyways, I first have to figure out what I am doing with my car before I decide to do this or not, . Ah well, off to study for western civ, haha.

Richard
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Old 04-07-2004, 09:52 AM   #18
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MORE INFO! MORE INFO... I'd like to know how this is all setup as well. Pics and some setup information if you please.
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Old 04-07-2004, 10:17 AM   #19
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Yeahs its like on a B16 with an intake when VTEC kicks in. shhhhhhhh.. BAAAAAAAH! Sounds cool. I had a 35mm on my honda and I loved the way it sounded.. I could hear the whooshing sound of the FMIC pipes more than anything.. so it wasnt that loud.
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Old 04-14-2005, 09:36 PM   #20
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I agree about the sound open waste gates make. The only time i've ever heard any open air dumping was on a Nissan Laurel Club-S, drifting in Japan. It had the same motor as a Nissan Skyline GTS-T (2.0L I-6 Turbo 24v).

turbo spool up sssshhhhhhhhh and right at near redline, BBAAAAAAAAAHHHHHHH!!

It does sound good, but man does it attract attention when it opens up!! You are essentially having exhaust come straight out of the turbo to open air (atmosphere) since it won't be rerouted back into the downpipe as the factory WG would be. Completely un-muffled and directly out of the turbo so that's why it is so loud.

I'm curious what our boxer would sound like with one.

STEALTH-WRX, Your link didn't work, page not found. Please update the link. Thanks
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Old 04-15-2005, 12:36 AM   #21
ebeck
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The 38mm wastegate. See that blue tag there on the WG. It says do not run leaded fuels through the 38mm wg. An ofter overlooked fact. It will damage the WG.



The 1 Bar Spring. Ya it fits. If you ever have to change one search for my name and Tial wastegate.


This is Cronics old setup. Same as mine. He tooks pics so I did not bother, Looks the same.




The 44mm seems to not be a loud. During a dyno day every body had fingers in thier ears for my 38mm pulls and the 44mm T67 was pretty dang quiet. It is basicly open header loud. Moreover it is harsh. Way harsh with the windows down. The tone as much as volume. I bought a 1993, 930 turbo EWG muffler. Yes they had them. I am getting used to it now though. I may not put it on now. Do not misunderstand. It is Hot Rod Harley loud. Like 5 blocks away you can hear it. Ever heard a chopper and said, damn that is loud? Well there you go. BPM and Apexi exhausts are downright soothing compared to 38mm. If you had the Apexi exhaust the EWG would drown it out. Run a 17# spring so it never opens unless you mean it. Cronic gave me that advice and I pass it on. I am adding another .6 bar spring in addition to my 1 bar srping.

The AVC-R is superb with the Tial 38mm. I had mega boost control problems with the AVCS due to AVCS. Outside the scope of this thread. Botom lin boost now hits quick and holds like a rock. The degree of control with the AVC-R is excellent. It takes a bit of time to fully understand it as the documentation is confusing. If you need help just pm me. I can give you my number and I can brain dump on you.

Last edited by ebeck; 04-15-2005 at 12:51 AM.
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Old 04-15-2005, 12:44 AM   #22
dan avoN7
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oooo thats what i want. haha on my 44mm tial it opens up very very early. I only have the .6 bar spring.
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Old 04-15-2005, 12:57 AM   #23
ebeck
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Ya Dan, I had the .6 bar spring. Down right annoying. I need 17# spring. That is my low boost setting anyhow. Here is the swap instructions. http://forums.nasioc.com/forums/showthread.php?t=743603 With the Tial you can run inner and outer springs. Here are your choices in addition to your current 0.6 bar Small Blue
0.7 bar Big Yellow
0.8 bar Big Red
0.9 bar Big Green
1.0 bar Big Blue

Good luck with that turbo. Expect more out here.
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Old 04-15-2005, 01:40 AM   #24
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So people are sayingyou can get a Tial 38 that is able to run leaded race gas?
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Old 04-15-2005, 01:51 AM   #25
ebeck
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I am not aware of that. I know people run Leaded fuel through the Tail 38mm, probably becasue they tore the tag off and did not read it. On the plus side, you can run Manganese through it. MMT that is. I confirmed with Tial.
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