Case Study #403 - EWG on STock Turbo IX
Jul 3, 2007, 11:44 AM
#92
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If you guys want to see a good quality video of what a dump tube sounds like, check out this video: http://videos.streetfire.net/recentv...3801707a99.htm
It's a stock turbo STi with a open dump. I know it's an STi, but you get an idea of what it would sound like on the Evo
. Turn up your volume for the full effect >:].
It's a stock turbo STi with a open dump. I know it's an STi, but you get an idea of what it would sound like on the Evo
. Turn up your volume for the full effect >:].
Jul 3, 2007, 01:38 PM
#96
I had one of those on my DSM. They have been popular for quite a long time.... but in all honesty I'd never do it again unless I had absolutely used up all other power making options.
They are soooooooo fricken loud and annoying. They sound mean from a distance outside the car but that can be translated into cop magnet as well.
I'm not sure what the claimed HP level is for filling up a 3" exhaust but I know the stock turbo isn't going to do it. I doubt there is much of a gain if any at all.
They are soooooooo fricken loud and annoying. They sound mean from a distance outside the car but that can be translated into cop magnet as well.
I'm not sure what the claimed HP level is for filling up a 3" exhaust but I know the stock turbo isn't going to do it. I doubt there is much of a gain if any at all.
Jul 3, 2007, 03:55 PM
#98
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very interested in one of the dump tubes that will be made...count me in and put me on the list! thanks
In theory - it has two advantages
1 - It in effect makes the exhuast work like a larger one - by opening a seperate passage it gives less back pressure
(interestingly when we tried to run higher boost - thus closing the gate - the car actually lost power. To find peak power we needed to find the sweet spot. The lower your boost - (more flow through flapper) - the more the dump tube is helping)
2 - It helps the reduce turbulence by keeping the flow seperate
It remains to be seen what kind of gains we see in A - B testing
All I can say at this point is that this is prob the most power I have seen out of any stock turbo on our dyno to date
Al
1 - It in effect makes the exhuast work like a larger one - by opening a seperate passage it gives less back pressure
(interestingly when we tried to run higher boost - thus closing the gate - the car actually lost power. To find peak power we needed to find the sweet spot. The lower your boost - (more flow through flapper) - the more the dump tube is helping)
2 - It helps the reduce turbulence by keeping the flow seperate
It remains to be seen what kind of gains we see in A - B testing
All I can say at this point is that this is prob the most power I have seen out of any stock turbo on our dyno to date
Al
Jul 3, 2007, 04:20 PM
#100
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Well, I don't think it's annoying, but it would be annoying if I hit 1 psi, and the damn thing went SHHHHHHHHHHHHHHHHHHHHHHHHH @ 25823952 decibels. But I doubt that would happen. Just wanted to ballpark how it would sound with the throttle control so I can drive around town without attracting cops or giving seniors heart attacks.
Is someone going to be producing any of these? I would love to have one these though
.
Is someone going to be producing any of these? I would love to have one these though
.
Last edited by TeKiZeRo; Jul 3, 2007 at 04:24 PM.
Jul 3, 2007, 07:18 PM
#101
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Well, I don't think it's annoying, but it would be annoying if I hit 1 psi, and the damn thing went SHHHHHHHHHHHHHHHHHHHHHHHHH @ 25823952 decibels. But I doubt that would happen. Just wanted to ballpark how it would sound with the throttle control so I can drive around town without attracting cops or giving seniors heart attacks.
Is someone going to be producing any of these? I would love to have one these though.
Is someone going to be producing any of these? I would love to have one these though
.
Jul 3, 2007, 10:28 PM
#103
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Have you ever heard one of those WWII piston-engined fighter planes when their engine first fires up? It is kind of a deep, crackling, staccato explosive cacophany? Well, if you were to isolate just one of the audible combustion events coming from one of those stubby exhaust tubes on the flight deck of a WWII aircraft carrier...That would be your sound, more or less. Or have you ever been in a bigrig diesel going downgrade and been spooked by the exhaust brake? It's sorta like that, but just a single brap!
Last edited by sparky; Jul 3, 2007 at 10:32 PM.
Jul 4, 2007, 08:53 AM
#104
any updates on testing and such ?
sti ewg-this one is so noticeable
http://videos.streetfire.net/search/...40000add20.htm
eclipse gsx 4g63
http://youtube.com/watch?v=YhTEhxnBPpo
loud as fk.
sti ewg-this one is so noticeable
http://videos.streetfire.net/search/...40000add20.htm
eclipse gsx 4g63
http://youtube.com/watch?v=YhTEhxnBPpo
loud as fk.
Jul 4, 2007, 09:00 AM
#105
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any updates on testing and such ?
sti ewg-this one is so noticeable
http://videos.streetfire.net/search/...40000add20.htm
eclipse gsx 4g63
http://youtube.com/watch?v=YhTEhxnBPpo
loud as fk.
sti ewg-this one is so noticeable
http://videos.streetfire.net/search/...40000add20.htm
eclipse gsx 4g63
http://youtube.com/watch?v=YhTEhxnBPpo
loud as fk.
those are external wastegates, not internal ones with open dumps.
i dunno if al is testing anyone this week, but I'm going up this Sat so results should be up by then.