exactly how loud is a vented dumptube???
Eats, Sleeps, Dreams Rotary
Joined: Feb 2002
Posts: 3,045
Likes: 2
From: North Coast
Originally posted by razorback
what turbo is that for? is that custom? (would assume so)
what turbo is that for? is that custom? (would assume so)
"I got that GT35/40 Kit from Ivan at RPM in Australia. It was quite the ordeal trying to get it made. It is one of very few made with a cast mani...I guess Ivan and Tim down there (they started that whole GT35/40 thing) were having problems with SS mani's cracking on high boost pulls...so you have the absolute first cast mani made for the FD.
He is curious how it does as well, he emailed me not to long ago to see how my dyno went...then I had to break the bad news to him.
But now you know"
He is curious how it does as well, he emailed me not to long ago to see how my dyno went...then I had to break the bad news to him.
But now you know"
Senior Member
Joined: Feb 2001
Posts: 337
Likes: 0
From: Glendale, AZ
heres a vid of my open wastegate on dyno, racetrack etc.
yea they're not quiet.
J
draghttp://www.idahorotary.com/12.93firebird.wmv
autoxhttp://idahorotary.com/autox1.wmv
dynohttp://idahorotary.com/jayson.wmv
yea they're not quiet.
J
draghttp://www.idahorotary.com/12.93firebird.wmv
autoxhttp://idahorotary.com/autox1.wmv
dynohttp://idahorotary.com/jayson.wmv
Weird Cat Man
Joined: Aug 2001
Posts: 2,868
Likes: 3
From: A pale blue dot
I've got a vid of my car on the dyno on my ftp...
ftp.zeroglabs.com
username - rx7
password - rx7
directory is car_movies_2/movies15 and the file is called brian_405_dyno.avi or something similar.
Brian
ftp.zeroglabs.com
username - rx7
password - rx7
directory is car_movies_2/movies15 and the file is called brian_405_dyno.avi or something similar.
Brian
Rebreaking things
Joined: Jun 2001
Posts: 2,586
Likes: 0
From: 1 foot in Boston 1 in NJ
Last weekend I heard a single turbo with a mp, N1 exhaust and a vented WG on the dyno. I was standing by the pas side door when he made a couple pulls. Before the WG opened it was LOUD and after it opened it went from loud to horrendously stupid loud. In a way it was kind of neat, but I think it would get old after a few highway pulls.
my car is so loud it makes my ears rign after a long highway drive. The car Chris is talking about is way louder and i would not ever drive it unless it was track only.
Originally posted by CCarlisi
Last weekend I heard a single turbo with a mp, N1 exhaust and a vented WG on the dyno. I was standing by the pas side door when he made a couple pulls. Before the WG opened it was LOUD and after it opened it went from loud to horrendously stupid loud. In a way it was kind of neat, but I think it would get old after a few highway pulls.
Last weekend I heard a single turbo with a mp, N1 exhaust and a vented WG on the dyno. I was standing by the pas side door when he made a couple pulls. Before the WG opened it was LOUD and after it opened it went from loud to horrendously stupid loud. In a way it was kind of neat, but I think it would get old after a few highway pulls.
I measured 118.7dB in my car with the windows UP - god knows what it is outside!
Thats loud enough to cause instant permanent hearing damage - I wouldn't recommend it. Even driving around with earplugs hurts my ears after a few minutes.
My car is currently being re-muffled and i'm putting that dump tube back into the exhaust
-Manolis
PS - Apneablue, that manifold is not cast, it's a tubular manifold with what looks like a ceramic coating.
Thats loud enough to cause instant permanent hearing damage - I wouldn't recommend it. Even driving around with earplugs hurts my ears after a few minutes.
My car is currently being re-muffled and i'm putting that dump tube back into the exhaust
-Manolis
PS - Apneablue, that manifold is not cast, it's a tubular manifold with what looks like a ceramic coating.
Last edited by Manolis_D; Mar 31, 2004 at 05:27 PM.
Eats, Sleeps, Dreams Rotary
Joined: Feb 2002
Posts: 3,045
Likes: 2
From: North Coast
Originally posted by Manolis_D
I measured 118.7dB in my car with the windows UP - god knows what it is outside!
Thats loud enough to cause instant permanent hearing damage - I wouldn't recommend it. Even driving around with earplugs hurts my ears after a few minutes.
My car is currently being re-muffled and i'm putting that dump tube back into the exhaust
-Manolis
PS - Apneablue, that manifold is not cast, it's a tubular manifold with what looks like a ceramic coating.
I measured 118.7dB in my car with the windows UP - god knows what it is outside!
Thats loud enough to cause instant permanent hearing damage - I wouldn't recommend it. Even driving around with earplugs hurts my ears after a few minutes.
My car is currently being re-muffled and i'm putting that dump tube back into the exhaust
-Manolis
PS - Apneablue, that manifold is not cast, it's a tubular manifold with what looks like a ceramic coating.
NorCal 7's Co-founder
Joined: Aug 2002
Posts: 4,130
Likes: 5
From: Rocklin, CA
From the setups that I have heard, it's NO WAY at all nearly as loud as vented to atmosphere. Unless the ones I heard just weren't boosting high enough or something. How much of a difference did you see Manolis??
Zach
Zach
3rd motors a charm I hope
Joined: Apr 2003
Posts: 2,054
Likes: 0
From: Central New York
Originally posted by RX7 RAGE
anybody running a open wastegate WITH a resonated midpipe?
anybody running a open wastegate WITH a resonated midpipe?
I think 27 is a bit much.... I'd say more like a few like 1-5... *maybe*.
Just be sure to enter back into the exhaust stream 18in or more down stream of the turbo. That should minimize the increased turbulence to a point that any losses will be negligable.
I'll be doing that on my next system. I love the open sound but it draws way too much attention... and when you're accelerating that fast, you don't need the audio to go with the visual IMO
-Chris
Just be sure to enter back into the exhaust stream 18in or more down stream of the turbo. That should minimize the increased turbulence to a point that any losses will be negligable.
I'll be doing that on my next system. I love the open sound but it draws way too much attention... and when you're accelerating that fast, you don't need the audio to go with the visual IMO
-Chris
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