how loud is an atmospheric wastegate dump?
 

Seriously, for a street car? It would really simplify the hot-parts by a country mile.

I assume it would be similar to open header. IE, LOUD, since its not even dampened by the turbine at all. I'm pretty sure at least Chad is open dump, so maybe he can chime in.

It is loud, but it is more of a hissing sound rather then an open header sound.

Here is a video of a friend's SRT-gay which has open WG.

I love mine.

And so do my neighbors:laugh:

livable and simplified. I'm looking at failure points now, and instead of 9 bolts to fuck with, I'll have 3 clamps that won't get brittle and break.

Not a big deal at all. It will only come on at WOT anyway, and if your doing that its gonna be loud regardless. K.I.S.S.

Not deafening, but lame. I like my street cars pretty quiet, but my real problem with wastegate dumps is that they sound horrendous. Like as bad as Fran Dresher dragging her nails down a chalkboard.

...while laughing?


:crx:

I ran mine this way for a week while fabricating the wastegate branch, sounds terrible.

At boost and WOT it was totally obnoxious, killed all the sweet sound of the rest of the system.

Just run it VTA for a week, then weld in the branch if you don't like it.

Entire message deleted. (I fail at reading.)

We are talking EWG, not BOV.

its pretty loud...

I'm trying to understand how this would make things easier...

You want to make an internally wastegated turbo DTA?

Are you going to v-clamp the turbine exit somehow (welded fitment?) and just let the wastegate flapper vent into a pipe that goes under the car?

I don't understand how you could make a v-band setup with your turbo and not still have the WG join back up 18" down the line.

I would say "we need more info to help you noob" but I know you're just looking for opinions on noise. My opinion is your exhaust sounds fucking awesome right now, and I don't think dumping WG would improve it any, and would certainly get you unwanted attention from all directions: cops, ricer thieves, tranny hookers, etc.

It's loud on a 400 whp civic I got a ride in.


Chris

I thought I had a video of Airbrush1's dyno pull, he was open wastegate and I remember it being the loudest car on the dyno out of 7 or so other turboed miatas.

http://www.dcr62.net/Car%20Pics/E30%..._Wastegate.jpg

Its really cool right now on the track because you can't hear the turbo...you just see a green miata with a lot of hp raping. I'm so confused right now. Hold me.

OMG that's sex!

You were internal right?

Is this part of your big plan to avoid fasteners altogether?

Please explain.

I know I'm being annoying, but I'm really just interested in how this is going to work.

I do think DTA is a baaad idea, although on the road you may hardly every trip that WG since you probably hit 200rwtq with 60% of your max boost.

Ninja edit reply:

I think you want to just keep changing your car. Do what you need to fix your fastener problem...but keep that sweet exhaust and ninja potential you've got. Everyone hears the gorillas and elephants coming...it's the panthers that strike fear.

Don't you know this shit from your special ops training?

Yeah, its fun to work on cars. That's why I'm paying $350 out my ass to have someone drive 5-hours each way with a trailer to come get my car because I'm fucking stranded. Its fun, and I like working on cars.

Find the fastener fix and I'll buy it immediately. I want to drive the car, not work on it.

I had a EWG with a VTA on my old 2g. It was loud but it wasn't like I am going to go insane from it. But everyone could hear when I it opened that was for sure.

As for it on a street car. It depends on your driving style. If you just put around and only give it part throttle and don't hit your max boost often it liveable on the street. AKA not ever cop will be gunning for you. If you gun it also or if running low boost then it retard as it will be open over 75% of the time and will get you in deep shit with cops, neighbors and will most likely give you a headache.

As for a track car... IDK I am not sure, depends of if you want to listen it all the time. Kinda like running an open downpipe it just loud and after a in while it gets annoying, but I will admit it does make plumping easier and also never had an boost creep even when running my EWG off the O2 housing instead of the manifold.

Thanks.

Everyone take notes. This is how you make a proper post.

It's fucking annoying. I had a 38mm turbosmart on my Forester XT and it was the most annoying, obnoxious sound, especially on the dyno. When I was riding with the windows closed it was OK, but I had the whole interior Raammatted and close-cell foamed to make it quiet. I was still annoying everyone else though.

Just plumb it back into the exhaust downstream.

A bigger WG is actually quieter. Like a 44 Tial vs the 38.

Frank

It's loud when it opens, very loud. Is it unbearable, not at all. If you have a 2" exhaust and run a cat and a large muffler, then it will be much louder than what you are currently hearing at WOT. If you already have a full 3" catless setup, then it's just a little bit louder than what you are already hearing.

If you have a setup that spools instantly and you are only running 10# of boost then you will hear it often and it will annoy you if you use the car as a daily driver. On the other hand, if you run a slightly larger turbo and a higher amount of boost, then it will never open under daily driving conditions. During spirited driving you will definitely hear it and so will everyone around you.

One last thing to do is actually hear a Miata that runs this setup in person. I watched so many videos of cars and they sound nothing like my car does. Even the videos I have made of my own car sound nothing like how it sounds when you are next to it or riding in it.

All I've heard with an atmosdump is Matt Andrew's car and it has about 3" of side dump exhaust so it doesn't really compare.

How loud it is depends on how much boost you are running. i.e., if the turbo requires a majority of the exhaust flow to maintain requested boost level, the dump will be quieter. And vice-versa.

If you run big boost on a big turbo w/ a small engine, that's a recipe for a quiet external dump.

examples:
The external on my daily dsm (2.0L / 65Lb/min turbo) got a lot quieter moving from 18 to 24psi. Not bad, ran 2 years.

Running an external dump (same 2.0L) with a very small stock T25 at 12psi results in an extremely loud and disgusting sound. Absolutely horrible, lasted 1 day.

I had one on 3 different DSMs and the first time I rode in an EVO with the external plumbed back in, I was in heaven. The external dump is so loud and obnoxious after a while. It's fun at first opening it up next to people to see their reaction, but it really gets old quick. Add into the mix that the miata is a convertible and it'll be even louder.

I definitely recommend plumbing it back in.

I just like to say my friends MR2 turbo dumps to atmosphere and the questions is not how loud its how awesome is it?
Its just brilliant I cant wait to do it :D

It's just brilliant how you had to drag up a 5-week old post to tell us about your bro's MR2, broseph, I can't wait to REACH THROUGH THIS SCREEN AND HIT YOU IN THE FACE WITH YOUR KEYBOARD

It's ok to read old threads, but to resurrect an old thread to add completely worthless commentary is juvenile.

lol, Savington said you were a bitch. I recommend you never put you location because I'm a pretty bad-ass dude and you don't want to piss me off. I'll wear your face as a fucking mask...I've been to prison, and I learned quickly that when you want to teach someone respect, pliers and a blow-torch get your point across rather quickly.

http://images.google.com/url?source=...RVKJR1zLKCGr8Q


Thats right! Hustlers on the Right :)

talk shit again and I'll chop you in half with a sword.

there's a striking resemblance, mostly in the the fact that he's white, wearing a ball gag, and covered in bloody urine.